NationalInstruments.DAQmx

Represents a channel or a set of channels and the properties you can set on a channel.

is the base class for , , , , , and . All instances of are of one of the derived class types. Refer to the derived class documentation for more information.Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Gets the name of the virtual channel.

A that represents the name of the virtual channel. The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Releases all resources used by .

Use this method only if the application you create runs on a low memory system. The NI-DAQmx driver returned an error.

Indicates whether the channel is a global channel.

A value that indicates whether the channel is a global channel. The NI-DAQmx driver returned an error.

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Indicates the type of the virtual channel.

Indicates the type of the virtual channel. The NI-DAQmx driver returned an error.

Specifies the name of the physical channel upon which this virtual channel is based.

Specifies the name of the physical channel upon which this virtual channel is based. The NI-DAQmx driver returned an error.

Specifies a user-defined description for the channel.

Specifies a user-defined description for the channel. The NI-DAQmx driver returned an error.

Specifies the action to take if the target loses its synchronization to the grand master.

Specifies the action to take if the target loses its synchronization to the grand master. The NI-DAQmx driver returned an error.

Encapsulates one or more analog input virtual channels and the properties for an analog input virtual channel.

Use the property to create or access an analog input virtual channel. An might contain more than one virtual channel because the is defined by providing a valid NI-DAQmx channel string to the indexer or to an create virtual channel method. If you set a property on an object that represents multiple virtual channels, that property is set for all of the virtual channels that the object represents.Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Performs a bridge offset nulling calibration on the virtual channels in the task. An error will occur if not all virtual channels in the task support this operation.

The NI-DAQmx driver returned an error. This method adjusts the , , and properties to eliminate voltage offset in the virtual channel. If the acquisition device does not have a built-in potentiometer, only the initial bridge voltage attribute is adjusted. The task must not be reserved, committed, or started. All virtual channel configurations must be complete prior to calling this method. The physical channel must remain in the state at which you expect to read 0 V from the bridge while the method executes.

Gets or sets the date and time that the channel calibration expires.

The date and time that the channel calibration expires. The NI-DAQmx driver returned an error.

Gets or sets the last date and time that the channel underwent a channel calibration.

The last date and time that the channel underwent a channel calibration. The NI-DAQmx driver returned an error.

Performs a bridge offset nulling calibration on the virtual channels in the task.

Specifies whether or not to skip channels that do not support shunt calibration. If is , shunt calibration will be performed only on supported virtual channels in the task. If , shunt calibration will be performed on all virtual channels in the task, which may result in an error if not all channels support shunt calibration. The NI-DAQmx driver returned an error. This method adjusts the , , and properties to eliminate voltage offset in the virtual channel. If the acquisition device does not have a built-in potentiometer, only the initial bridge voltage attribute is adjusted. The task must not be reserved, committed, or started. All virtual channel configurations must be complete prior to calling this method. The physical channel must remain in the state at which you expect to read 0 V from the bridge while the method executes.

Performs shunt calibration for the virtual channels in the task using a strain gage sensor.

Specifies the shunt resistance, in ohms. Specifies the location of the shunt resistor. Specifies whether or not to skip channels that do not support shunt calibration. If is , shunt calibration will be performed only on supported virtual channels in the task. If , shunt calibration will be performed on all virtual channels in the task, which may result in an error if not all channels support shunt calibration. The NI-DAQmx driver returned an error.

Performs shunt calibration for the virtual channels in the task using a strain gage sensor. An error will occur if not all virtual channels in the task support this operation.

Specifies the shunt resistance, in ohms. Specifies the location of the shunt resistor. The NI-DAQmx driver returned an error.

Performs shunt calibration for the virtual channels in the task using a bridge sensor.

Specifies the shunt resistance, in ohms. Specifies the location of the shunt resistor. Specifies the bridge resistance, in ohms. Specifies whether or not to skip channels that do not support shunt calibration. If is , shunt calibration will be performed only on supported virtual channels in the task. If , shunt calibration will be performed on all virtual channels in the task, which may result in an error if not all channels support shunt calibration. The NI-DAQmx driver returned an error.

Performs shunt calibration for the virtual channels in the task using a bridge sensor. An error will occur if not all virtual channels in the task support this operation.

Specifies the shunt resistance, in ohms. Specifies the location of the shunt resistor. Specifies the bridge resistance, in ohms. The NI-DAQmx driver returned an error.

Performs thermocouple lead offset nulling calibration on the channels in the task to compensate for offsets introduced by open thermocouple detection. Use this method to specify whether or not to skip channels that do not support calibration.

Specifies whether or not to skip channels that do not support calibration. If is , calibration will be performed only on supported virtual channels in the task. If , calibration will be performed on all virtual channels in the task, which may result in an error if not all channels support calibration. The NI-DAQmx driver returned an error. Keep the measured temperature as constant as possible while performing this adjustment.

Performs thermocouple lead offset nulling calibration on the channels in the task to compensate for offsets introduced by open thermocouple detection. An error will occur if not all virtual channels in the task support this operation.

The NI-DAQmx driver returned an error. Keep the measured temperature as constant as possible while performing this adjustment.

Performs shunt calibration for the specified channels using a strain gage sensor.

The resistance, in ohms, of the shunt resistor. The location of the shunt resistor. The shunt calibration switch to use. The shunt resistor to use. The NI-DAQmx driver returned an error.

Performs shunt calibration for the specified channels using a strain gage sensor.

The resistance, in ohms, of the shunt resistor. The location of the shunt resistor. The shunt calibration switch to use. The shunt resistor to use. Specifies whether or not to skip channels that do not support shunt calibration. If is , shunt calibration is performed only on supported channels. If , shunt calibration is performed on channels specified by . The default is . The NI-DAQmx driver returned an error.

Performs shunt calibration for the specified channels using a bridge sensor.

The resistance, in ohms, of the shunt resistor. The location of the shunt resistor. The resistance, in ohms, of the bridge sensor. The shunt calibration switch to use. The shunt resistor to use. The NI-DAQmx driver returned an error.

Performs shunt calibration for the specified channels using a bridge sensor.

The resistance, in ohms, of the shunt resistor. The location of the shunt resistor. The resistance, in ohms, of the bridge sensor. The shunt calibration switch to use. The shunt resistor to use. Specifies whether or not to skip channels that do not support shunt calibration. If is , shunt calibration is performed only on supported channels. If , shunt calibration is performed on channels specified by . The default is . The NI-DAQmx driver returned an error.

Specifies the maximum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced maximum value that the device can measure with the current settings.

Specifies the maximum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced maximum value that the device can measure with the current settings. The NI-DAQmx driver returned an error.

Specifies the minimum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced minimum value that the device can measure with the current settings.

Specifies the minimum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced minimum value that the device can measure with the current settings. The NI-DAQmx driver returned an error.

Specifies the name of a custom scale for the channel.

Specifies the name of a custom scale for the channel. The NI-DAQmx driver returned an error.

Indicates the measurement to take with the analog input channel and in some cases, such as for temperature measurements, the sensor to use.

Indicates the measurement to take with the analog input channel and in some cases, such as for temperature measurements, the sensor to use. The NI-DAQmx driver returned an error.

Specifies the units to use to return voltage measurements from the channel.

Specifies the units to use to return voltage measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes.

Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. The NI-DAQmx driver returned an error.

Specifies the units to use to return voltage RMS measurements from the channel.

Specifies the units to use to return voltage RMS measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the units to use to return temperature measurements from the channel.

Specifies the units to use to return temperature measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range.

Specifies the type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range. The NI-DAQmx driver returned an error.

Specifies the method or equation form that the thermocouple scale uses.

Specifies the method or equation form that the thermocouple scale uses. The NI-DAQmx driver returned an error.

Indicates the source of cold-junction compensation.

Indicates the source of cold-junction compensation. The NI-DAQmx driver returned an error.

Specifies the temperature of the cold junction if is . Specify this value in the units of the measurement.

Specifies the temperature of the cold junction if is . Specify this value in the units of the measurement. The NI-DAQmx driver returned an error.

Indicates the channel that acquires the temperature of the cold junction if is . If the channel is a temperature channel, NI-DAQmx acquires the temperature in the correct units. Other channel types, such as a resistance channel with a custom sensor, must use a custom scale to scale values to degrees Celsius.

Indicates the channel that acquires the temperature of the cold junction if is . If the channel is a temperature channel, NI-DAQmx acquires the temperature in the correct units. Other channel types, such as a resistance channel with a custom sensor, must use a custom scale to scale values to degrees Celsius. The NI-DAQmx driver returned an error.

Specifies the type of RTD connected to the channel.

Specifies the type of RTD connected to the channel. The NI-DAQmx driver returned an error.

Specifies in ohms the sensor resistance at 0 deg C. The Callendar-Van Dusen equation requires this value. Refer to the sensor documentation to determine this value.

Specifies in ohms the sensor resistance at 0 deg C. The Callendar-Van Dusen equation requires this value. Refer to the sensor documentation to determine this value. The NI-DAQmx driver returned an error.

Specifies the 'A' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD.

Specifies the 'A' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. The NI-DAQmx driver returned an error.

Specifies the 'B' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD.

Specifies the 'B' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. The NI-DAQmx driver returned an error.

Specifies the 'C' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD.

Specifies the 'C' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. The NI-DAQmx driver returned an error.

Specifies the 'A' constant of the Steinhart-Hart thermistor equation.

Specifies the 'A' constant of the Steinhart-Hart thermistor equation. The NI-DAQmx driver returned an error.

Specifies the 'B' constant of the Steinhart-Hart thermistor equation.

Specifies the 'B' constant of the Steinhart-Hart thermistor equation. The NI-DAQmx driver returned an error.

Specifies the 'C' constant of the Steinhart-Hart thermistor equation.

Specifies the 'C' constant of the Steinhart-Hart thermistor equation. The NI-DAQmx driver returned an error.

Specifies in ohms the value of the reference resistor for the thermistor if you use voltage excitation. NI-DAQmx ignores this value for current excitation.

Specifies in ohms the value of the reference resistor for the thermistor if you use voltage excitation. NI-DAQmx ignores this value for current excitation. The NI-DAQmx driver returned an error.

Specifies whether to read from the channel if it is a cold-junction compensation channel. By default, reading from the task does not return data from cold-junction compensation channels. Setting this property to forces read operations to return the cold-junction compensation channel data with the other channels in the task.

Specifies whether to read from the channel if it is a cold-junction compensation channel. By default, reading from the task does not return data from cold-junction compensation channels. Setting this property to forces read operations to return the cold-junction compensation channel data with the other channels in the task. The NI-DAQmx driver returned an error.

Specifies the units to use to return current measurements from the channel.

Specifies the units to use to return current measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the units to use to return current RMS measurements from the channel.

Specifies the units to use to return current RMS measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the units to use to return strain measurements from the channel.

Specifies the units to use to return strain measurements from the channel. The NI-DAQmx driver returned an error.

Specifies whether the data is returned by reading from the task when set on a raw strain channel that is part of a rosette configuration.

Specifies whether the data is returned by reading from the task when set on a raw strain channel that is part of a rosette configuration. The NI-DAQmx driver returned an error.

Specifies the sensitivity of the strain gage. Gage factor relates the change in electrical resistance to the change in strain. Refer to the sensor documentation for this value.

Specifies the sensitivity of the strain gage. Gage factor relates the change in electrical resistance to the change in strain. Refer to the sensor documentation for this value. The NI-DAQmx driver returned an error.

Specifies the ratio of lateral strain to axial strain in the material you are measuring.

Specifies the ratio of lateral strain to axial strain in the material you are measuring. The NI-DAQmx driver returned an error.

Specifies the bridge configuration of the strain gages.

Specifies the bridge configuration of the strain gages. The NI-DAQmx driver returned an error.

Indicates the type of rosette gage.

Indicates the type of rosette gage. The NI-DAQmx driver returned an error.

Specifies gage orientation in degrees with respect to the X axis.

Specifies gage orientation in degrees with respect to the X axis. The NI-DAQmx driver returned an error.

Indicates the raw strain channels that comprise the strain rosette.

Indicates the raw strain channels that comprise the strain rosette. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies the type of rosette measurement.

Specifies the type of rosette measurement. The NI-DAQmx driver returned an error.

Specifies the units to use to return resistance measurements.

Specifies the units to use to return resistance measurements. The NI-DAQmx driver returned an error.

Specifies the units to use to return frequency measurements from the channel.

Specifies the units to use to return frequency measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the voltage level at which to recognize waveform repetitions. You should select a voltage level that occurs only once within the entire period of a waveform. You also can select a voltage that occurs only once while the voltage rises or falls.

Specifies the voltage level at which to recognize waveform repetitions. You should select a voltage level that occurs only once within the entire period of a waveform. You also can select a voltage that occurs only once while the voltage rises or falls. The NI-DAQmx driver returned an error.

Specifies in volts a window below . The input voltage must pass below minus this value before NI-DAQmx recognizes a waveform repetition at . Hysteresis can improve the measurement accuracy when the signal contains noise or jitter.

Specifies in volts a window below . The input voltage must pass below minus this value before NI-DAQmx recognizes a waveform repetition at . Hysteresis can improve the measurement accuracy when the signal contains noise or jitter. The NI-DAQmx driver returned an error.

Specifies the units to use to return linear position measurements from the channel.

Specifies the units to use to return linear position measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the sensitivity of the LVDT. This value is in the units you specify with . Refer to the sensor documentation to determine this value.

Specifies the sensitivity of the LVDT. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The NI-DAQmx driver returned an error.

Specifies the units of .

Specifies the units of . The NI-DAQmx driver returned an error.

Specifies the units to use to return angular position measurements from the channel.

Specifies the units to use to return angular position measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the sensitivity of the RVDT. This value is in the units you specify with . Refer to the sensor documentation to determine this value.

Specifies the sensitivity of the RVDT. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The NI-DAQmx driver returned an error.

Specifies the units of .

Specifies the units of . The NI-DAQmx driver returned an error.

Specifies the units to use to return proximity measurements from the channel.

Specifies the units to use to return proximity measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the sensitivity of the eddy current proximity probe . This value is in the units you specify with . Refer to the sensor documentation to determine this value.

Specifies the sensitivity of the eddy current proximity probe . This value is in the units you specify with . Refer to the sensor documentation to determine this value. The NI-DAQmx driver returned an error.

Specifies the units of .

Specifies the units of . The NI-DAQmx driver returned an error.

Specifies the maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals. NI-DAQmx uses the maximum sound pressure level to calculate values in pascals for and for the channel.

Specifies the maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals. NI-DAQmx uses the maximum sound pressure level to calculate values in pascals for and for the channel. The NI-DAQmx driver returned an error.

Specifies the units to use to return sound pressure measurements from the channel.

Specifies the units to use to return sound pressure measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. NI-DAQmx also uses the decibel reference level when converting to a voltage level.

Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. NI-DAQmx also uses the decibel reference level when converting to a voltage level. The NI-DAQmx driver returned an error.

Specifies the sensitivity of the microphone. This value is in mV/Pa. Refer to the sensor documentation to determine this value.

Specifies the sensitivity of the microphone. This value is in mV/Pa. Refer to the sensor documentation to determine this value. The NI-DAQmx driver returned an error.

Specifies the units to use to return acceleration measurements from the channel.

Specifies the units to use to return acceleration measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes.

Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. The NI-DAQmx driver returned an error.

Specifies the sensitivity of the 4 wire DC voltage acceleration sensor connected to the channel. This value is the units you specify with AI.Accel.4WireDCVoltage.SensitivityUnits. Refer to the sensor documentation to determine this value.

Specifies the sensitivity of the 4 wire DC voltage acceleration sensor connected to the channel. This value is the units you specify with AI.Accel.4WireDCVoltage.SensitivityUnits. Refer to the sensor documentation to determine this value. The NI-DAQmx driver returned an error.

Specifies the units of AI.Accel.4WireDCVoltage.Sensitivity.

Specifies the units of AI.Accel.4WireDCVoltage.Sensitivity. The NI-DAQmx driver returned an error.

Specifies the sensitivity of the accelerometer. This value is in the units you specify with . Refer to the sensor documentation to determine this value.

Specifies the sensitivity of the accelerometer. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The NI-DAQmx driver returned an error.

Specifies the units of .

Specifies the units of . The NI-DAQmx driver returned an error.

Specifies the sensitivity of the charge acceleration sensor connected to the channel. This value is the units you specify with AI.Accel.Charge.SensitivityUnits. Refer to the sensor documentation to determine this value.

Specifies the sensitivity of the charge acceleration sensor connected to the channel. This value is the units you specify with AI.Accel.Charge.SensitivityUnits. Refer to the sensor documentation to determine this value. The NI-DAQmx driver returned an error.

Specifies the units of AI.Accel.Charge.Sensitivity.

Specifies the units of AI.Accel.Charge.Sensitivity. The NI-DAQmx driver returned an error.

Specifies in which unit to return velocity measurements from the channel.

Specifies in which unit to return velocity measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes.

Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. The NI-DAQmx driver returned an error.

Specifies the sensitivity of the IEPE velocity sensor connected to the channel. Specify this value in the unit indicated by .

Specifies the sensitivity of the IEPE velocity sensor connected to the channel. Specify this value in the unit indicated by . The NI-DAQmx driver returned an error.

Specifies the units for .

Specifies the units for . The NI-DAQmx driver returned an error.

Specifies in which unit to return force or load measurements from the channel.

Specifies in which unit to return force or load measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the sensitivity of the IEPE force sensor connected to the channel. Specify this value in the unit indicated by .

Specifies the sensitivity of the IEPE force sensor connected to the channel. Specify this value in the unit indicated by . The NI-DAQmx driver returned an error.

Specifies the units for .

Specifies the units for . The NI-DAQmx driver returned an error.

Specifies in which unit to return pressure measurements from the channel.

Specifies in which unit to return pressure measurements from the channel. The NI-DAQmx driver returned an error.

Specifies in which unit to return torque measurements from the channel.

Specifies in which unit to return torque measurements from the channel. The NI-DAQmx driver returned an error.

Specifies in which unit to return voltage ratios from the channel.

Specifies in which unit to return voltage ratios from the channel. The NI-DAQmx driver returned an error.

Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values. The NI-DAQmx driver returned an error.

Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values. The NI-DAQmx driver returned an error.

Specifies the scaling type to use when scaling electrical values from the sensor to physical units.

Specifies the scaling type to use when scaling electrical values from the sensor to physical units. The NI-DAQmx driver returned an error.

Specifies the first electrical value, corresponding to . Specify this value in the unit indicated by .

Specifies the first electrical value, corresponding to . Specify this value in the unit indicated by . The NI-DAQmx driver returned an error.

Specifies the first physical value, corresponding to . Specify this value in the unit indicated by .

Specifies the first physical value, corresponding to . Specify this value in the unit indicated by . The NI-DAQmx driver returned an error.

Specifies the second electrical value, corresponding to . Specify this value in the unit indicated by .

Specifies the second electrical value, corresponding to . Specify this value in the unit indicated by . The NI-DAQmx driver returned an error.

Specifies the second physical value, corresponding to . Specify this value in the unit indicated by .

Specifies the second physical value, corresponding to . Specify this value in the unit indicated by . The NI-DAQmx driver returned an error.

Specifies the array of electrical values that map to the values in . Specify this value in the unit indicated by .

Specifies the array of electrical values that map to the values in . Specify this value in the unit indicated by . The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies the array of physical values that map to the values in . Specify this value in the unit indicated by .

Specifies the array of physical values that map to the values in . Specify this value in the unit indicated by . The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array of coefficients for the polynomial that converts electrical values to physical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3.

Specifies an array of coefficients for the polynomial that converts electrical values to physical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array of coefficients for the polynomial that converts physical values to electrical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3.

Specifies an array of coefficients for the polynomial that converts physical values to electrical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies the units to use to return charge measurements from the channel.

Specifies the units to use to return charge measurements from the channel. The NI-DAQmx driver returned an error.

Indicates if the virtual channel was initialized using a TEDS bitstream from the corresponding physical channel.

Indicates if the virtual channel was initialized using a TEDS bitstream from the corresponding physical channel. The NI-DAQmx driver returned an error.

Indicates the units defined by TEDS information associated with the channel.

Indicates the units defined by TEDS information associated with the channel. The NI-DAQmx driver returned an error.

Specifies the coupling for the channel.

Specifies the coupling for the channel. The NI-DAQmx driver returned an error.

Specifies the input impedance of the channel.

Specifies the input impedance of the channel. The NI-DAQmx driver returned an error.

Specifies the terminal configuration for the channel.

Specifies the terminal configuration for the channel. The NI-DAQmx driver returned an error.

Specifies the source of the channel. You can use the signal from the I/O connector or one of several calibration signals. Certain devices have a single calibration signal bus. For these devices, you must specify the same calibration signal for all channels you connect to a calibration signal.

Specifies the source of the channel. You can use the signal from the I/O connector or one of several calibration signals. Certain devices have a single calibration signal bus. For these devices, you must specify the same calibration signal for all channels you connect to a calibration signal. The NI-DAQmx driver returned an error.

Specifies the resistance configuration for the channel. NI-DAQmx uses this value for any resistance-based measurements, including temperature measurement using a thermistor or RTD.

Specifies the resistance configuration for the channel. NI-DAQmx uses this value for any resistance-based measurements, including temperature measurement using a thermistor or RTD. The NI-DAQmx driver returned an error.

Specifies in ohms the resistance of the wires that lead to the sensor.

Specifies in ohms the resistance of the wires that lead to the sensor. The NI-DAQmx driver returned an error.

Specifies the type of Wheatstone bridge connected to the channel.

Specifies the type of Wheatstone bridge connected to the channel. The NI-DAQmx driver returned an error.

Specifies in ohms the resistance of the bridge while not under load.

Specifies in ohms the resistance of the bridge while not under load. The NI-DAQmx driver returned an error.

Specifies in volts the output voltage of the bridge while not under load. NI-DAQmx subtracts this value from any measurements before applying scaling equations. If you set , NI-DAQmx coerces this property to times . This property is set by DAQmx Perform Bridge Offset Nulling Calibration. If you set this property, NI-DAQmx coerces to the value of this property divided by . If you set both this property and , and their values conflict, NI-DAQmx returns an error. To avoid this error, reset one property to its default value before setting the other.

Specifies in volts the output voltage of the bridge while not under load. NI-DAQmx subtracts this value from any measurements before applying scaling equations. If you set , NI-DAQmx coerces this property to times . This property is set by DAQmx Perform Bridge Offset Nulling Calibration. If you set this property, NI-DAQmx coerces to the value of this property divided by . If you set both this property and , and their values conflict, NI-DAQmx returns an error. To avoid this error, reset one property to its default value before setting the other. The NI-DAQmx driver returned an error.

Specifies in volts per volt the ratio of output voltage from the bridge to excitation voltage supplied to the bridge while not under load. NI-DAQmx subtracts this value from any measurements before applying scaling equations. If you set , NI-DAQmx coerces this property to divided by . If you set this property, NI-DAQmx coerces to the value of this property times . If you set both this property and , and their values conflict, NI-DAQmx returns an error. To avoid this error, reset one property to its default value before setting the other.

Specifies in volts per volt the ratio of output voltage from the bridge to excitation voltage supplied to the bridge while not under load. NI-DAQmx subtracts this value from any measurements before applying scaling equations. If you set , NI-DAQmx coerces this property to divided by . If you set this property, NI-DAQmx coerces to the value of this property times . If you set both this property and , and their values conflict, NI-DAQmx returns an error. To avoid this error, reset one property to its default value before setting the other. The NI-DAQmx driver returned an error.

Specifies whether to enable a shunt calibration switch. Use to select the switch(es) to enable.

Specifies whether to enable a shunt calibration switch. Use to select the switch(es) to enable. The NI-DAQmx driver returned an error.

Specifies which shunt calibration switch(es) to enable. Use to enable the switch(es) you specify with this property.

Specifies which shunt calibration switch(es) to enable. Use to enable the switch(es) you specify with this property. The NI-DAQmx driver returned an error.

Specifies whether to use internal or external shunt when Shunt Cal A is selected.

Specifies whether to use internal or external shunt when Shunt Cal A is selected. The NI-DAQmx driver returned an error.

Specifies the result of a shunt calibration. This property is set by DAQmx Perform Shunt Calibration. NI-DAQmx multiplies data read from the channel by the value of this property. This value should be close to 1.0.

Specifies the result of a shunt calibration. This property is set by DAQmx Perform Shunt Calibration. NI-DAQmx multiplies data read from the channel by the value of this property. This value should be close to 1.0. The NI-DAQmx driver returned an error.

Specifies in ohms the desired value of the internal shunt calibration A resistor.

Specifies in ohms the desired value of the internal shunt calibration A resistor. The NI-DAQmx driver returned an error.

Specifies in ohms the actual value of the internal shunt calibration A resistor.

Specifies in ohms the actual value of the internal shunt calibration A resistor. The NI-DAQmx driver returned an error.

Specifies in ohms the desired value of the internal shunt calibration B resistor.

Specifies in ohms the desired value of the internal shunt calibration B resistor. The NI-DAQmx driver returned an error.

Specifies in ohms the actual value of the internal shunt calibration B resistor.

Specifies in ohms the actual value of the internal shunt calibration B resistor. The NI-DAQmx driver returned an error.

Specifies by how much to compensate for offset in the signal. This value can be between 0 and 127.

Specifies by how much to compensate for offset in the signal. This value can be between 0 and 127. The NI-DAQmx driver returned an error.

Specifies by how much to compensate for offset in the signal. This value can be between 0 and 4095.

Specifies by how much to compensate for offset in the signal. This value can be between 0 and 4095. The NI-DAQmx driver returned an error.

Specifies the shunt resistor location for current measurements.

Specifies the shunt resistor location for current measurements. The NI-DAQmx driver returned an error.

Specifies in ohms the external shunt resistance for current measurements.

Specifies in ohms the external shunt resistance for current measurements. The NI-DAQmx driver returned an error.

Specifies whether to use local or remote sense to sense excitation.

Specifies whether to use local or remote sense to sense excitation. The NI-DAQmx driver returned an error.

Specifies the source of excitation.

Specifies the source of excitation. The NI-DAQmx driver returned an error.

Specifies the amount of excitation that the sensor requires. If is , this value is in volts. If is , this value is in amperes.

Specifies the amount of excitation that the sensor requires. If is , this value is in volts. If is , this value is in amperes. The NI-DAQmx driver returned an error.

Specifies if NI-DAQmx divides the measurement by the excitation. You should typically set this property to for ratiometric transducers. If you set this property to , set and to reflect the scaling.

Specifies if NI-DAQmx divides the measurement by the excitation. You should typically set this property to for ratiometric transducers. If you set this property to , set and to reflect the scaling. The NI-DAQmx driver returned an error. For example, if you expect to acquire a voltage between -5 and 5, and you use an excitation of .10 volts to scale the measurement, set to -50 and set to 50. If you set to , this property has no effect on the measurement.

Specifies if the SCXI-1122 multiplexes the excitation to the upper half of the channels as it advances through the scan list.

Specifies if the SCXI-1122 multiplexes the excitation to the upper half of the channels as it advances through the scan list. The NI-DAQmx driver returned an error.

Specifies the actual amount of excitation supplied by an internal excitation source. If you read an internal excitation source more precisely with an external device, set this property to the value you read. NI-DAQmx ignores this value for external excitation. When performing shunt calibration, some devices set this property automatically.

Specifies the actual amount of excitation supplied by an internal excitation source. If you read an internal excitation source more precisely with an external device, set this property to the value you read. NI-DAQmx ignores this value for external excitation. When performing shunt calibration, some devices set this property automatically. The NI-DAQmx driver returned an error.

Specifies if the excitation supply is DC or AC.

Specifies if the excitation supply is DC or AC. The NI-DAQmx driver returned an error.

Specifies if the channel uses current or voltage excitation.

Specifies if the channel uses current or voltage excitation. The NI-DAQmx driver returned an error.

Specifies whether this channel will disable excitation after the task is uncommitted. Setting this to Zero Volts or Amps disables excitation after task uncommit. Setting this attribute to Maintain Existing Value leaves the excitation on after task uncommit.

Specifies whether this channel will disable excitation after the task is uncommitted. Setting this to Zero Volts or Amps disables excitation after task uncommit. Setting this attribute to Maintain Existing Value leaves the excitation on after task uncommit. The NI-DAQmx driver returned an error.

Specifies the AC excitation frequency in Hertz.

Specifies the AC excitation frequency in Hertz. The NI-DAQmx driver returned an error.

Specifies whether to synchronize the AC excitation source of the channel to that of another channel. Synchronize the excitation sources of multiple channels to use multichannel sensors. Set this property to for the master channel and to for the slave channels.

Specifies whether to synchronize the AC excitation source of the channel to that of another channel. Synchronize the excitation sources of multiple channels to use multichannel sensors. Set this property to for the master channel and to for the slave channels. The NI-DAQmx driver returned an error.

Specifies the number of leads on the LVDT or RVDT. Some sensors require you to tie leads together to create a four- or five- wire sensor. Refer to the sensor documentation for more information.

Specifies the number of leads on the LVDT or RVDT. Some sensors require you to tie leads together to create a four- or five- wire sensor. Refer to the sensor documentation for more information. The NI-DAQmx driver returned an error.

Specifies whether to apply the open thermocouple detection bias voltage to the channel. Changing the value of this property on a channel may require settling time before the data returned is valid. To compensate for this settling time, discard unsettled data or add a delay between committing and starting the task. Refer to your device specifications for the required settling time. When open thermocouple detection is enabled, use to determine if any channels were open.

Specifies whether to apply the open thermocouple detection bias voltage to the channel. Changing the value of this property on a channel may require settling time before the data returned is valid. To compensate for this settling time, discard unsettled data or add a delay between committing and starting the task. Refer to your device specifications for the required settling time. When open thermocouple detection is enabled, use to determine if any channels were open. The NI-DAQmx driver returned an error.

Specifies the lead offset nulling voltage to subtract from measurements on a device. This property is ignored if open thermocouple detection is disabled.

Specifies the lead offset nulling voltage to subtract from measurements on a device. This property is ignored if open thermocouple detection is disabled. The NI-DAQmx driver returned an error.

Specifies the amount of attenuation to use.

Specifies the amount of attenuation to use. The NI-DAQmx driver returned an error.

Specifies the amount of attenuation provided by the probe connected to the channel. Specify this attenuation as a ratio.

Specifies the amount of attenuation provided by the probe connected to the channel. Specify this attenuation as a ratio. The NI-DAQmx driver returned an error.

Specifies whether to enable the lowpass filter of the channel.

Specifies whether to enable the lowpass filter of the channel. The NI-DAQmx driver returned an error.

Specifies the frequency in Hertz that corresponds to the -3dB cutoff of the filter.

Specifies the frequency in Hertz that corresponds to the -3dB cutoff of the filter. The NI-DAQmx driver returned an error.

Specifies the source of the filter clock. If you need a higher resolution for the filter, you can supply an external clock to increase the resolution. Refer to the SCXI-1141/1142/1143 User Manual for more information.

Specifies the source of the filter clock. If you need a higher resolution for the filter, you can supply an external clock to increase the resolution. Refer to the SCXI-1141/1142/1143 User Manual for more information. The NI-DAQmx driver returned an error.

Specifies the frequency of the external clock when you set to . NI-DAQmx uses this frequency to set the pre- and post- filters on the SCXI-1141, SCXI-1142, and SCXI-1143. On those devices, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information.

Specifies the frequency of the external clock when you set to . NI-DAQmx uses this frequency to set the pre- and post- filters on the SCXI-1141, SCXI-1142, and SCXI-1143. On those devices, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information. The NI-DAQmx driver returned an error.

Specifies the divisor for the external clock when you set to . On the SCXI-1141, SCXI-1142, and SCXI-1143, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information.

Specifies the divisor for the external clock when you set to . On the SCXI-1141, SCXI-1142, and SCXI-1143, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information. The NI-DAQmx driver returned an error.

Specifies the divisor for the output clock. NI-DAQmx uses the cutoff frequency to determine the output clock frequency. Refer to the SCXI-1141/1142/1143 User Manual for more information.

Specifies the divisor for the output clock. NI-DAQmx uses the cutoff frequency to determine the output clock frequency. Refer to the SCXI-1141/1142/1143 User Manual for more information. The NI-DAQmx driver returned an error.

Specifies whether the digital filter is enabled or disabled.

Specifies whether the digital filter is enabled or disabled. The NI-DAQmx driver returned an error.

Specifies the digital filter type.

Specifies the digital filter type. The NI-DAQmx driver returned an error.

Specifies the digital filter response.

Specifies the digital filter response. The NI-DAQmx driver returned an error.

Specifies the order of the digital filter.

Specifies the order of the digital filter. The NI-DAQmx driver returned an error.

Specifies the lowpass cutoff frequency of the digital filter.

Specifies the lowpass cutoff frequency of the digital filter. The NI-DAQmx driver returned an error.

Specifies the highpass cutoff frequency of the digital filter.

Specifies the highpass cutoff frequency of the digital filter. The NI-DAQmx driver returned an error.

Specifies the center frequency of the passband for the digital filter.

Specifies the center frequency of the passband for the digital filter. The NI-DAQmx driver returned an error.

Specifies the width of the passband centered around the center frequency for the digital filter.

Specifies the width of the passband centered around the center frequency for the digital filter. The NI-DAQmx driver returned an error.

Specifies the center frequency of the stopband for the digital filter.

Specifies the center frequency of the stopband for the digital filter. The NI-DAQmx driver returned an error.

Specifies the width of the stopband centered around the center frequency for the digital filter.

Specifies the width of the stopband centered around the center frequency for the digital filter. The NI-DAQmx driver returned an error.

Specifies the digital filter coefficients.

Specifies the digital filter coefficients. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the amount of time between when the ADC samples data and when the sample is read by the host device. This value is in the units you specify with . You can adjust this amount of time using .

Indicates the amount of time between when the ADC samples data and when the sample is read by the host device. This value is in the units you specify with . You can adjust this amount of time using . The NI-DAQmx driver returned an error.

Specifies the units of and .

Specifies the units of and . The NI-DAQmx driver returned an error.

Specifies if filter delay removal is enabled on the device.

Specifies if filter delay removal is enabled on the device. The NI-DAQmx driver returned an error.

Specifies the amount of filter delay that gets removed if is enabled. This delay adjustment is in addition to the value indicated by . This delay adjustment is in the units you specify with .

Specifies the amount of filter delay that gets removed if is enabled. This delay adjustment is in addition to the value indicated by . This delay adjustment is in the units you specify with . The NI-DAQmx driver returned an error.

Specifies the number of samples to average while acquiring data. Increasing the number of samples to average reduces noise in your measurement.

Specifies the number of samples to average while acquiring data. Increasing the number of samples to average reduces noise in your measurement. The NI-DAQmx driver returned an error.

Indicates the units of .

Indicates the units of . The NI-DAQmx driver returned an error.

Indicates the resolution of the analog-to-digital converter of the channel. This value is in the units you specify with .

Indicates the resolution of the analog-to-digital converter of the channel. This value is in the units you specify with . The NI-DAQmx driver returned an error.

Indicates in bits the size of a raw sample from the device.

Indicates in bits the size of a raw sample from the device. The NI-DAQmx driver returned an error.

Indicates the justification of a raw sample from the device.

Indicates the justification of a raw sample from the device. The NI-DAQmx driver returned an error.

Specifies the ADC timing mode, controlling the tradeoff between speed and effective resolution. Some ADC timing modes provide increased powerline noise rejection. On devices that have an AI Convert clock, this setting affects both the maximum and default values for . You must use the same ADC timing mode for all channels on a device, but you can use different ADC timing modes for different devices in the same task.

Specifies the ADC timing mode, controlling the tradeoff between speed and effective resolution. Some ADC timing modes provide increased powerline noise rejection. On devices that have an AI Convert clock, this setting affects both the maximum and default values for . You must use the same ADC timing mode for all channels on a device, but you can use different ADC timing modes for different devices in the same task. The NI-DAQmx driver returned an error.

Specifies the timing mode of the ADC when is .

Specifies the timing mode of the ADC when is . The NI-DAQmx driver returned an error.

Specifies whether to enable dithering. Dithering adds Gaussian noise to the input signal. You can use dithering to achieve higher resolution measurements by over sampling the input signal and averaging the results.

Specifies whether to enable dithering. Dithering adds Gaussian noise to the input signal. You can use dithering to achieve higher resolution measurements by over sampling the input signal and averaging the results. The NI-DAQmx driver returned an error.

Indicates if the channel has calibration information.

Indicates if the channel has calibration information. The NI-DAQmx driver returned an error.

Specifies whether to enable the channel calibration associated with the channel.

Specifies whether to enable the channel calibration associated with the channel. The NI-DAQmx driver returned an error.

Specifies whether to apply the channel calibration to the channel after the expiration date has passed.

Specifies whether to apply the channel calibration to the channel after the expiration date has passed. The NI-DAQmx driver returned an error.

Specifies the method or equation form that the calibration scale uses.

Specifies the method or equation form that the calibration scale uses. The NI-DAQmx driver returned an error.

Specifies the reference values collected when calibrating the channel.

Specifies the reference values collected when calibrating the channel. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies the acquired values collected when calibrating the channel.

Specifies the acquired values collected when calibrating the channel. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies the forward polynomial values used for calibrating the channel.

Specifies the forward polynomial values used for calibrating the channel. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies the reverse polynomial values used for calibrating the channel.

Specifies the reverse polynomial values used for calibrating the channel. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies the name of the operator who performed the channel calibration.

Specifies the name of the operator who performed the channel calibration. The NI-DAQmx driver returned an error.

Specifies the description entered for the calibration of the channel.

Specifies the description entered for the calibration of the channel. The NI-DAQmx driver returned an error.

Specifies the reference values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process.

Specifies the reference values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies the acquired values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process.

Specifies the acquired values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies the upper limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts.

Specifies the upper limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. The NI-DAQmx driver returned an error.

Specifies the lower limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts.

Specifies the lower limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. The NI-DAQmx driver returned an error.

Specifies the DC value to add to the input range of the device. Use and to specify the input range. This offset is in the native units of the device .

Specifies the DC value to add to the input range of the device. Use and to specify the input range. This offset is in the native units of the device . The NI-DAQmx driver returned an error.

Specifies a gain factor to apply to the channel.

Specifies a gain factor to apply to the channel. The NI-DAQmx driver returned an error.

Specifies whether to enable the sample and hold circuitry of the device. When you disable sample and hold circuitry, a small voltage offset might be introduced into the signal. You can eliminate this offset by using to perform an auto zero on the channel.

Specifies whether to enable the sample and hold circuitry of the device. When you disable sample and hold circuitry, a small voltage offset might be introduced into the signal. You can eliminate this offset by using to perform an auto zero on the channel. The NI-DAQmx driver returned an error.

Specifies how often to measure ground. NI-DAQmx subtracts the measured ground voltage from every sample.

Specifies how often to measure ground. NI-DAQmx subtracts the measured ground voltage from every sample. The NI-DAQmx driver returned an error.

Specifies whether the device will chop its inputs. Chopping removes offset voltages and other low frequency errors.

Specifies whether the device will chop its inputs. Chopping removes offset voltages and other low frequency errors. The NI-DAQmx driver returned an error.

Specifies the rate in B/s to transfer data from the device. If this value is not set, then the device will transfer data at a rate based on the bus detected. Modify this value to affect performance under different combinations of operating system, configuration, and device.

Specifies the rate in B/s to transfer data from the device. If this value is not set, then the device will transfer data at a rate based on the bus detected. Modify this value to affect performance under different combinations of operating system, configuration, and device. The NI-DAQmx driver returned an error.

Specifies the data transfer mode for the device.

Specifies the data transfer mode for the device. The NI-DAQmx driver returned an error.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer. The NI-DAQmx driver returned an error.

Specifies the number of samples that must be in the FIFO to transfer data from the device if is .

Specifies the number of samples that must be in the FIFO to transfer data from the device if is . The NI-DAQmx driver returned an error.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. The NI-DAQmx driver returned an error.

Specifies the type of compression to apply to raw samples returned from the device.

Specifies the type of compression to apply to raw samples returned from the device. The NI-DAQmx driver returned an error. Refer to the DAQmx Professional Tools Web site for more information and examples of raw data compression and streaming to disk.

Specifies the number of bits to return in a raw sample when is set to .

Specifies the number of bits to return in a raw sample when is set to . The NI-DAQmx driver returned an error. Refer to the DAQmx Professional Tools Web site for more information and examples of raw data compression and streaming to disk.

Indicates the coefficients of a polynomial equation that NI-DAQmx uses to scale values from the native format of the device to volts. Each element of the array corresponds to a term of the equation. For example, if index two of the array is 4, the third term of the equation is 4x^2. Scaling coefficients do not account for any custom scales or sensors contained by the channel.

Indicates the coefficients of a polynomial equation that NI-DAQmx uses to scale values from the native format of the device to volts. Each element of the array corresponds to a term of the equation. For example, if index two of the array is 4, the third term of the equation is 4x^2. Scaling coefficients do not account for any custom scales or sensors contained by the channel. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies whether to enable enhanced alias rejection. Leave this property set to the default value for most applications.

Specifies whether to enable enhanced alias rejection. Leave this property set to the default value for most applications. The NI-DAQmx driver returned an error.

Specifies whether to enable open channel detection.

Specifies whether to enable open channel detection. The NI-DAQmx driver returned an error.

Indicates if the device or devices detected an open channel condition in any virtual channel in the task. Reading this property clears the open channel status for all channels in this task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device or devices detected an open channel condition in any virtual channel in the task. Reading this property clears the open channel status for all channels in this task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any open virtual channels. You must read before you read this property. Otherwise you will receive an error.

Indicates a list of names of any open virtual channels. You must read before you read this property. Otherwise you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates a list of details of any open virtual channels. You must read before you read this property. Otherwise you will receive an error.

Indicates a list of details of any open virtual channels. You must read before you read this property. Otherwise you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Encapsulates one or more analog output channels and the properties for an analog output channel.

Use the property to create or access an analog output channel. An might contain more than one virtual channel because the is defined by providing a valid NI-DAQmx channel string to the indexer or to an create channel method. If you set a property on a object that represents multiple channels, that property is set for all of the channels that the object represents.Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Specifies the maximum value you expect to generate. The value is in the units you specify with a units property. If you try to write a value larger than the maximum value, NI-DAQmx generates an error. NI-DAQmx might coerce this value to a smaller value if other task settings restrict the device from generating the desired maximum.

Specifies the maximum value you expect to generate. The value is in the units you specify with a units property. If you try to write a value larger than the maximum value, NI-DAQmx generates an error. NI-DAQmx might coerce this value to a smaller value if other task settings restrict the device from generating the desired maximum. The NI-DAQmx driver returned an error.

Specifies the minimum value you expect to generate. The value is in the units you specify with a units property. If you try to write a value smaller than the minimum value, NI-DAQmx generates an error. NI-DAQmx might coerce this value to a larger value if other task settings restrict the device from generating the desired minimum.

Specifies the minimum value you expect to generate. The value is in the units you specify with a units property. If you try to write a value smaller than the minimum value, NI-DAQmx generates an error. NI-DAQmx might coerce this value to a larger value if other task settings restrict the device from generating the desired minimum. The NI-DAQmx driver returned an error.

Specifies the name of a custom scale for the channel.

Specifies the name of a custom scale for the channel. The NI-DAQmx driver returned an error.

Indicates whether the channel generates voltage, current, or a waveform.

Indicates whether the channel generates voltage, current, or a waveform. The NI-DAQmx driver returned an error.

Specifies in what units to generate voltage on the channel. Write data to the channel in the units you select.

Specifies in what units to generate voltage on the channel. Write data to the channel in the units you select. The NI-DAQmx driver returned an error.

Specifies the current limit, in amperes, for the voltage channel.

Specifies the current limit, in amperes, for the voltage channel. The NI-DAQmx driver returned an error.

Specifies in what units to generate current on the channel. Write data to the channel in the units you select.

Specifies in what units to generate current on the channel. Write data to the channel in the units you select. The NI-DAQmx driver returned an error.

Specifies the kind of the waveform to generate.

Specifies the kind of the waveform to generate. The NI-DAQmx driver returned an error.

Specifies the frequency of the waveform to generate in hertz.

Specifies the frequency of the waveform to generate in hertz. The NI-DAQmx driver returned an error.

Specifies the zero-to-peak amplitude of the waveform to generate in volts. Zero and negative values are valid.

Specifies the zero-to-peak amplitude of the waveform to generate in volts. Zero and negative values are valid. The NI-DAQmx driver returned an error.

Specifies the voltage offset of the waveform to generate.

Specifies the voltage offset of the waveform to generate. The NI-DAQmx driver returned an error.

Specifies the square wave duty cycle of the waveform to generate.

Specifies the square wave duty cycle of the waveform to generate. The NI-DAQmx driver returned an error.

Specifies if the device generates a modulated version of the waveform using the original waveform as a carrier and input from an external terminal as the signal.

Specifies if the device generates a modulated version of the waveform using the original waveform as a carrier and input from an external terminal as the signal. The NI-DAQmx driver returned an error.

Specifies the FM deviation in hertz per volt when is .

Specifies the FM deviation in hertz per volt when is . The NI-DAQmx driver returned an error.

Specifies in ohms the impedance of the analog output stage of the device.

Specifies in ohms the impedance of the analog output stage of the device. The NI-DAQmx driver returned an error.

Specifies in ohms the load impedance connected to the analog output channel.

Specifies in ohms the load impedance connected to the analog output channel. The NI-DAQmx driver returned an error.

Specifies the state of the channel when no generation is in progress.

Specifies the state of the channel when no generation is in progress. The NI-DAQmx driver returned an error.

Specifies the terminal configuration of the channel.

Specifies the terminal configuration of the channel. The NI-DAQmx driver returned an error.

Specifies the units of .

Specifies the units of . The NI-DAQmx driver returned an error.

Indicates the resolution of the digital-to-analog converter of the channel. This value is in the units you specify with .

Indicates the resolution of the digital-to-analog converter of the channel. This value is in the units you specify with . The NI-DAQmx driver returned an error.

Specifies the upper limit of the output range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts.

Specifies the upper limit of the output range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. The NI-DAQmx driver returned an error.

Specifies the lower limit of the output range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts.

Specifies the lower limit of the output range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. The NI-DAQmx driver returned an error.

Specifies whether to ground the internal DAC reference. Grounding the internal DAC reference has the effect of grounding all analog output channels and stopping waveform generation across all analog output channels regardless of whether the channels belong to the current task. You can ground the internal DAC reference only when is and is .

Specifies whether to ground the internal DAC reference. Grounding the internal DAC reference has the effect of grounding all analog output channels and stopping waveform generation across all analog output channels regardless of whether the channels belong to the current task. You can ground the internal DAC reference only when is and is . The NI-DAQmx driver returned an error.

Specifies whether to allow grounding the internal DAC reference at run time. You must set this property to and set to before you can set to .

Specifies whether to allow grounding the internal DAC reference at run time. You must set this property to and set to before you can set to . The NI-DAQmx driver returned an error.

Specifies the source of the DAC reference voltage. The value of this voltage source determines the full-scale value of the DAC.

Specifies the source of the DAC reference voltage. The value of this voltage source determines the full-scale value of the DAC. The NI-DAQmx driver returned an error.

Specifies the source of the DAC reference voltage if is . The valid sources for this signal vary by device.

Specifies the source of the DAC reference voltage if is . The valid sources for this signal vary by device. The NI-DAQmx driver returned an error.

Specifies in volts the value of the DAC reference voltage. This voltage determines the full-scale range of the DAC. Smaller reference voltages result in smaller ranges, but increased resolution.

Specifies in volts the value of the DAC reference voltage. This voltage determines the full-scale range of the DAC. Smaller reference voltages result in smaller ranges, but increased resolution. The NI-DAQmx driver returned an error.

Specifies the source of the DAC offset voltage. The value of this voltage source determines the full-scale value of the DAC.

Specifies the source of the DAC offset voltage. The value of this voltage source determines the full-scale value of the DAC. The NI-DAQmx driver returned an error.

Specifies the source of the DAC offset voltage if is . The valid sources for this signal vary by device.

Specifies the source of the DAC offset voltage if is . The valid sources for this signal vary by device. The NI-DAQmx driver returned an error.

Specifies in volts the value of the DAC offset voltage. To achieve best accuracy, the DAC offset value should be hand calibrated.

Specifies in volts the value of the DAC offset voltage. To achieve best accuracy, the DAC offset value should be hand calibrated. The NI-DAQmx driver returned an error.

Specifies whether to enable reglitching. The output of a DAC normally glitches whenever the DAC is updated with a new value. The amount of glitching differs from code to code and is generally largest at major code transitions. Reglitching generates uniform glitch energy at each code transition and provides for more uniform glitches. Uniform glitch energy makes it easier to filter out the noise introduced from glitching during spectrum analysis.

Specifies whether to enable reglitching. The output of a DAC normally glitches whenever the DAC is updated with a new value. The amount of glitching differs from code to code and is generally largest at major code transitions. Reglitching generates uniform glitch energy at each code transition and provides for more uniform glitches. Uniform glitch energy makes it easier to filter out the noise introduced from glitching during spectrum analysis. The NI-DAQmx driver returned an error.

Specifies the amount of time between when the sample is written by the host device and when the sample is output by the DAC. This value is in the units you specify with .

Specifies the amount of time between when the sample is written by the host device and when the sample is output by the DAC. This value is in the units you specify with . The NI-DAQmx driver returned an error.

Specifies the units of and .

Specifies the units of and . The NI-DAQmx driver returned an error.

Specifies an additional amount of time to wait between when the sample is written by the host device and when the sample is output by the DAC. This delay adjustment is in addition to the value indicated by . This delay adjustment is in the units you specify with .

Specifies an additional amount of time to wait between when the sample is written by the host device and when the sample is output by the DAC. This delay adjustment is in addition to the value indicated by . This delay adjustment is in the units you specify with . The NI-DAQmx driver returned an error.

Specifies in decibels the gain factor to apply to the channel.

Specifies in decibels the gain factor to apply to the channel. The NI-DAQmx driver returned an error.

Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory directly after you start the task. Onboard memory includes data FIFOs.

Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory directly after you start the task. Onboard memory includes data FIFOs. The NI-DAQmx driver returned an error.

Specifies the data transfer mode for the device.

Specifies the data transfer mode for the device. The NI-DAQmx driver returned an error.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device. The NI-DAQmx driver returned an error.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. The NI-DAQmx driver returned an error.

Indicates the coefficients of a linear equation that NI-DAQmx uses to scale values from a voltage to the native format of the device. Each element of the array corresponds to a term of the equation. The first element of the array corresponds to the y-intercept, and the second element corresponds to the slope. Scaling coefficients do not account for any custom scales that may be applied to the channel.

Indicates the coefficients of a linear equation that NI-DAQmx uses to scale values from a voltage to the native format of the device. Each element of the array corresponds to a term of the equation. The first element of the array corresponds to the y-intercept, and the second element corresponds to the slope. Scaling coefficients do not account for any custom scales that may be applied to the channel. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies whether to enable the DAC interpolation filter. Disable the interpolation filter to improve DAC signal-to-noise ratio at the expense of degraded image rejection.

Specifies whether to enable the DAC interpolation filter. Disable the interpolation filter to improve DAC signal-to-noise ratio at the expense of degraded image rejection. The NI-DAQmx driver returned an error.

Encapsulates one or more digital input channels and the properties for a digital input channel.

Use the property to create or access a digital input channel. A might contain more than one virtual channel because the is defined by providing a valid NI-DAQmx channel string to the indexer or to a create channel method. If you set a property on a object that represents multiple channels, that property is set for all of the channels that the object represents.Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Specifies whether to invert the lines in the channel. If you set this property to , the lines are at high logic when off and at low logic when on.

Specifies whether to invert the lines in the channel. If you set this property to , the lines are at high logic when off and at low logic when on. The NI-DAQmx driver returned an error.

Indicates the number of digital lines in the channel.

Indicates the number of digital lines in the channel. The NI-DAQmx driver returned an error.

Specifies whether to enable the digital filter for the line(s) or port(s). You can enable the filter on a line-by-line basis. You do not have to enable the filter for all lines in a channel.

Specifies whether to enable the digital filter for the line(s) or port(s). You can enable the filter on a line-by-line basis. You do not have to enable the filter for all lines in a channel. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes as a valid high or low state transition.

Specifies in seconds the minimum pulse width the filter recognizes as a valid high or low state transition. The NI-DAQmx driver returned an error.

Specifies whether to enable bus mode for digital filtering. If you set this property to , NI-DAQmx treats all lines that use common filtering settings as a bus. If any line in the bus has jitter, all lines in the bus hold state until the entire bus stabilizes, or until 2 times the minimum pulse width elapses. If you set this property to , NI-DAQmx filters all lines individually. Jitter in one line does not affect other lines.

Specifies whether to enable bus mode for digital filtering. If you set this property to , NI-DAQmx treats all lines that use common filtering settings as a bus. If any line in the bus has jitter, all lines in the bus hold state until the entire bus stabilizes, or until 2 times the minimum pulse width elapses. If you set this property to , NI-DAQmx filters all lines individually. Jitter in one line does not affect other lines. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Specifies whether to tristate the lines in the channel. If you set this property to , NI-DAQmx tristates the lines in the channel. If you set this property to , NI-DAQmx does not modify the configuration of the lines even if the lines were previously tristated. Set this property to to read lines in other tasks or to read output-only lines.

Specifies whether to tristate the lines in the channel. If you set this property to , NI-DAQmx tristates the lines in the channel. If you set this property to , NI-DAQmx does not modify the configuration of the lines even if the lines were previously tristated. Set this property to to read lines in other tasks or to read output-only lines. The NI-DAQmx driver returned an error.

Specifies the logic family to use for acquisition. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families.

Specifies the logic family to use for acquisition. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families. The NI-DAQmx driver returned an error.

Specifies the data transfer mode for the device.

Specifies the data transfer mode for the device. The NI-DAQmx driver returned an error.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer. The NI-DAQmx driver returned an error.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. The NI-DAQmx driver returned an error.

Specifies on which edge of the sample clock to acquire samples.

Specifies on which edge of the sample clock to acquire samples. The NI-DAQmx driver returned an error.

Encapsulates one or more digital output channels and the properties for a digital output channel.

Use the property to create or access a digital output channel. A might contain more than one virtual channel because the is defined by providing a valid NI-DAQmx channel string to the indexer or to a create channel method. If you set a property on a object that represents multiple channels, that property is set for all of the channels that the object represents.Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Specifies the drive type for digital output channels.

Specifies the drive type for digital output channels. The NI-DAQmx driver returned an error.

Specifies whether to invert the lines in the channel. If you set this property to , the lines are at high logic when off and at low logic when on.

Specifies whether to invert the lines in the channel. If you set this property to , the lines are at high logic when off and at low logic when on. The NI-DAQmx driver returned an error.

Indicates the number of digital lines in the channel.

Indicates the number of digital lines in the channel. The NI-DAQmx driver returned an error.

Specifies whether to stop driving the channel and set it to a high-impedance state. You must commit the task for this setting to take effect.

Specifies whether to stop driving the channel and set it to a high-impedance state. You must commit the task for this setting to take effect. The NI-DAQmx driver returned an error. Setting this property before you commit the task determines whether NI-DAQmx drives data on the channel or tristates the channel after the task transitions to the committed state. Use this property when you want to read and write to channels in a task. Set this property to before you read from the channel and set this property to before you write to the channel. When you read from an output channel that is not tristated, the value corresponds to the current value you are driving on the channel. When you write to a channel that is tristated, no change occurs until you set this property to . After you set this property to , the value NI-DAQmx drives on the channel corresponds to the last value written to the channel. Ensure the channel is tristated before any external devices that you connect to the channel drive data onto the channel. Failure to do so could result in double-driving the channel and damaging the device. This property is supported only for line-configurable, bidirectional ports.

Specifies the state of the lines in a digital output task when the task starts.

Specifies the state of the lines in a digital output task when the task starts. The NI-DAQmx driver returned an error.

Specifies the state of the lines in a digital output task when the task pauses.

Specifies the state of the lines in a digital output task when the task pauses. The NI-DAQmx driver returned an error.

Specifies the state of the lines in a digital output task when the task completes execution.

Specifies the state of the lines in a digital output task when the task completes execution. The NI-DAQmx driver returned an error.

Specifies the logic family to use for generation. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families.

Specifies the logic family to use for generation. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families. The NI-DAQmx driver returned an error.

Specifies the current threshold in Amperes for the channel. A value of 0 means the channel observes no limit. Devices can monitor only a finite number of current thresholds simultaneously. If you attempt to monitor additional thresholds, NI-DAQmx returns an error.

Specifies the current threshold in Amperes for the channel. A value of 0 means the channel observes no limit. Devices can monitor only a finite number of current thresholds simultaneously. If you attempt to monitor additional thresholds, NI-DAQmx returns an error. The NI-DAQmx driver returned an error.

Specifies whether to automatically reenable channels after they no longer exceed the current limit specified by .

Specifies whether to automatically reenable channels after they no longer exceed the current limit specified by . The NI-DAQmx driver returned an error.

Specifies the delay in seconds between the time a channel no longer exceeds the current limit and the reactivation of that channel, if is .

Specifies the delay in seconds between the time a channel no longer exceeds the current limit and the reactivation of that channel, if is . The NI-DAQmx driver returned an error.

Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory after you start the task. Onboard memory includes data FIFOs.

Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory after you start the task. Onboard memory includes data FIFOs. The NI-DAQmx driver returned an error.

Specifies the data transfer mode for the device.

Specifies the data transfer mode for the device. The NI-DAQmx driver returned an error.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device. The NI-DAQmx driver returned an error.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. The NI-DAQmx driver returned an error.

Specifies on which edge of the sample clock to generate samples.

Specifies on which edge of the sample clock to generate samples. The NI-DAQmx driver returned an error.

Encapsulates one counter/timer input channel and the properties for a counter/timer input channel.

Use the property to create or access a counter/timer input channel. A might contain more than one virtual channel because the is defined by providing a valid NI-DAQmx channel string to the indexer or to a create channel method. If you set a property on a object that represents multiple channels, that property is set for all of the channels that the object represents.Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Specifies the maximum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced maximum value that the hardware can measure with the current settings.

Specifies the maximum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced maximum value that the hardware can measure with the current settings. The NI-DAQmx driver returned an error.

Specifies the minimum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced minimum value that the hardware can measure with the current settings.

Specifies the minimum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced minimum value that the hardware can measure with the current settings. The NI-DAQmx driver returned an error.

Specifies the name of a custom scale for the channel.

Specifies the name of a custom scale for the channel. The NI-DAQmx driver returned an error.

Indicates the measurement to take with the channel.

Indicates the measurement to take with the channel. The NI-DAQmx driver returned an error.

Specifies the units to use to return frequency measurements.

Specifies the units to use to return frequency measurements. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to measure.

Specifies the input terminal of the signal to measure. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies between which edges to measure the frequency of the signal.

Specifies between which edges to measure the frequency of the signal. The NI-DAQmx driver returned an error.

Specifies the method to use to measure the frequency of the signal.

Specifies the method to use to measure the frequency of the signal. The NI-DAQmx driver returned an error.

Specifies whether to enable averaging mode for Sample Clock-timed frequency measurements.

Specifies whether to enable averaging mode for Sample Clock-timed frequency measurements. The NI-DAQmx driver returned an error.

Specifies in seconds the length of time to measure the frequency of the signal if is . Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, however, the count register could roll over, which results in an incorrect measurement.

Specifies in seconds the length of time to measure the frequency of the signal if is . Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, however, the count register could roll over, which results in an incorrect measurement. The NI-DAQmx driver returned an error.

Specifies the value by which to divide the input signal if is . The larger the divisor, the more accurate the measurement. However, too large a value could cause the count register to roll over, which results in an incorrect measurement.

Specifies the value by which to divide the input signal if is . The larger the divisor, the more accurate the measurement. However, too large a value could cause the count register to roll over, which results in an incorrect measurement. The NI-DAQmx driver returned an error.

Specifies the unit to use to return period measurements.

Specifies the unit to use to return period measurements. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to measure.

Specifies the input terminal of the signal to measure. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies between which edges to measure the period of the signal.

Specifies between which edges to measure the period of the signal. The NI-DAQmx driver returned an error.

Specifies the method to use to measure the period of the signal.

Specifies the method to use to measure the period of the signal. The NI-DAQmx driver returned an error.

Specifies whether to enable averaging mode for Sample Clock-timed period measurements.

Specifies whether to enable averaging mode for Sample Clock-timed period measurements. The NI-DAQmx driver returned an error.

Specifies in seconds the length of time to measure the period of the signal if is . Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, however, the count register could roll over, which results in an incorrect measurement.

Specifies in seconds the length of time to measure the period of the signal if is . Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, however, the count register could roll over, which results in an incorrect measurement. The NI-DAQmx driver returned an error.

Specifies the value by which to divide the input signal if is . The larger the divisor, the more accurate the measurement. However, too large a value could cause the count register to roll over, which results in an incorrect measurement.

Specifies the value by which to divide the input signal if is . The larger the divisor, the more accurate the measurement. However, too large a value could cause the count register to roll over, which results in an incorrect measurement. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to measure.

Specifies the input terminal of the signal to measure. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies whether to increment or decrement the counter on each edge.

Specifies whether to increment or decrement the counter on each edge. The NI-DAQmx driver returned an error.

Specifies the source terminal of the digital signal that controls the count direction if is .

Specifies the source terminal of the digital signal that controls the count direction if is . The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies the starting value from which to count.

Specifies the starting value from which to count. The NI-DAQmx driver returned an error.

Specifies on which edges to increment or decrement the counter.

Specifies on which edges to increment or decrement the counter. The NI-DAQmx driver returned an error.

Specifies whether to reset the count on the active edge specified with .

Specifies whether to reset the count on the active edge specified with . The NI-DAQmx driver returned an error.

Specifies the value to reset the count to.

Specifies the value to reset the count to. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to reset the count.

Specifies the input terminal of the signal to reset the count. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies the minimum pulse width the filter recognizes.

Specifies the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input of the signal to use as the timebase of the pulse width filter.

Specifies the input of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Specifies on which edge of the signal to reset the count.

Specifies on which edge of the signal to reset the count. The NI-DAQmx driver returned an error.

Specifies whether to enable the functionality to gate the counter input signal for a count edges measurement.

Specifies whether to enable the functionality to gate the counter input signal for a count edges measurement. The NI-DAQmx driver returned an error.

Specifies the gate terminal.

Specifies the gate terminal. The NI-DAQmx driver returned an error.

Specifies the gate terminal configuration.

Specifies the gate terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the gate input line.

Specifies the logic level behavior on the gate input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the gate input signal.

Specifies whether to apply the pulse width filter to the gate input signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the digital filter recognizes.

Specifies in seconds the minimum pulse width the digital filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether the counter gates input pulses while the signal is high or low.

Specifies whether the counter gates input pulses while the signal is high or low. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to measure.

Specifies the input terminal of the signal to measure. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the digital filter recognizes.

Specifies in seconds the minimum pulse width the digital filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies which edge of the input signal to begin the duty cycle measurement.

Specifies which edge of the input signal to begin the duty cycle measurement. The NI-DAQmx driver returned an error.

Specifies the units to use to return angular position measurements from the channel.

Specifies the units to use to return angular position measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B.

Specifies the number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B. The NI-DAQmx driver returned an error.

Specifies the starting angle of the encoder. This value is in the units you specify with .

Specifies the starting angle of the encoder. This value is in the units you specify with . The NI-DAQmx driver returned an error.

Specifies the units to use to return linear encoder measurements from the channel.

Specifies the units to use to return linear encoder measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units you specify with .

Specifies the distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units you specify with . The NI-DAQmx driver returned an error.

Specifies the position of the encoder when the measurement begins. This value is in the units you specify with .

Specifies the position of the encoder when the measurement begins. This value is in the units you specify with . The NI-DAQmx driver returned an error.

Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. , , and are valid for quadrature encoders only. is valid for two-pulse encoders only.

Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. , , and are valid for quadrature encoders only. is valid for two-pulse encoders only. The NI-DAQmx driver returned an error. X2 and X4 decoding are more sensitive to smaller changes in position than X1 encoding, with X4 being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if vibration exists in the encoder or other noise exists in the signals.

Specifies the terminal to which signal A is connected.

Specifies the terminal to which signal A is connected. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies the terminal to which signal B is connected.

Specifies the terminal to which signal B is connected. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies the terminal to which signal Z is connected.

Specifies the terminal to which signal Z is connected. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies whether to use Z indexing for the channel.

Specifies whether to use Z indexing for the channel. The NI-DAQmx driver returned an error.

Specifies the value to which to reset the measurement when signal Z is high and signal A and signal B are at the states you specify with . Specify this value in the units of the measurement.

Specifies the value to which to reset the measurement when signal Z is high and signal A and signal B are at the states you specify with . Specify this value in the units of the measurement. The NI-DAQmx driver returned an error.

Specifies the states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while signal A and signal B are high, for example, you must choose a phase other than .

Specifies the states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while signal A and signal B are high, for example, you must choose a phase other than . The NI-DAQmx driver returned an error. When signal Z transitions to high and how long it stays high varies from encoder to encoder. Refer to the documentation for the encoder to determine the timing of signal Z with respect to signal A and signal B.

Specifies the units to use to return pulse width measurements.

Specifies the units to use to return pulse width measurements. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to measure.

Specifies the input terminal of the signal to measure. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies on which edge of the input signal to begin each pulse width measurement.

Specifies on which edge of the input signal to begin each pulse width measurement. The NI-DAQmx driver returned an error.

Specifies the units to use to return timestamp measurements.

Specifies the units to use to return timestamp measurements. The NI-DAQmx driver returned an error.

Specifies the number of seconds that elapsed since the beginning of the current year. This value is ignored if is .

Specifies the number of seconds that elapsed since the beginning of the current year. This value is ignored if is . The NI-DAQmx driver returned an error.

Specifies the method to use to synchronize the counter to a GPS receiver.

Specifies the method to use to synchronize the counter to a GPS receiver. The NI-DAQmx driver returned an error.

Specifies the terminal to which the GPS synchronization signal is connected.

Specifies the terminal to which the GPS synchronization signal is connected. The NI-DAQmx driver returned an error.

Specifies the units to use to return angular velocity counter measurements.

Specifies the units to use to return angular velocity counter measurements. The NI-DAQmx driver returned an error.

Specifies the number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B.

Specifies the number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B. The NI-DAQmx driver returned an error.

Specifies the units to use to return linear encoder velocity measurements from the channel.

Specifies the units to use to return linear encoder velocity measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units you specify in CI.Velocity.LinEncoder.DistUnits.

Specifies the distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units you specify in CI.Velocity.LinEncoder.DistUnits. The NI-DAQmx driver returned an error.

Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. Two Pulse Counting is valid for two-pulse encoders only.

Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. Two Pulse Counting is valid for two-pulse encoders only. The NI-DAQmx driver returned an error.

Specifies the terminal to which signal A is connected.

Specifies the terminal to which signal A is connected. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior of the input terminal.

Specifies the logic level behavior of the input terminal. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the digital filter recognizes.

Specifies in seconds the minimum pulse width the digital filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies the terminal to which signal B is connected.

Specifies the terminal to which signal B is connected. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior of the input terminal.

Specifies the logic level behavior of the input terminal. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the digital filter recognizes.

Specifies in seconds the minimum pulse width the digital filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies in seconds the length of time to measure the velocity of the signal.

Specifies in seconds the length of time to measure the velocity of the signal. The NI-DAQmx driver returned an error.

Specifies the value by which to divide the input signal.

Specifies the value by which to divide the input signal. The NI-DAQmx driver returned an error.

Specifies the units to use to return two-edge separation measurements from the channel.

Specifies the units to use to return two-edge separation measurements from the channel. The NI-DAQmx driver returned an error.

Specifies the source terminal of the digital signal that starts each measurement.

Specifies the source terminal of the digital signal that starts each measurement. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies on which edge of the first signal to start each measurement.

Specifies on which edge of the first signal to start each measurement. The NI-DAQmx driver returned an error.

Specifies the source terminal of the digital signal that stops each measurement.

Specifies the source terminal of the digital signal that stops each measurement. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies on which edge of the second signal to stop each measurement.

Specifies on which edge of the second signal to stop each measurement. The NI-DAQmx driver returned an error.

Specifies the units to use to return semi-period measurements.

Specifies the units to use to return semi-period measurements. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to measure.

Specifies the input terminal of the signal to measure. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies on which edge of the input signal to begin semi-period measurement. Semi-period measurements alternate between high time and low time, starting on this edge.

Specifies on which edge of the input signal to begin semi-period measurement. Semi-period measurements alternate between high time and low time, starting on this edge. The NI-DAQmx driver returned an error.

Specifies the units to use to return pulse specifications in terms of frequency.

Specifies the units to use to return pulse specifications in terms of frequency. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to measure.

Specifies the input terminal of the signal to measure. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the signal to measure.

Specifies whether to apply a digital filter to the signal to measure. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Specifies on which edge of the input signal to begin pulse measurement.

Specifies on which edge of the input signal to begin pulse measurement. The NI-DAQmx driver returned an error.

Specifies the units to use to return pulse specifications in terms of high time and low time.

Specifies the units to use to return pulse specifications in terms of high time and low time. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to measure.

Specifies the input terminal of the signal to measure. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the signal to measure.

Specifies whether to apply a digital filter to the signal to measure. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Specifies on which edge of the input signal to begin pulse measurement.

Specifies on which edge of the input signal to begin pulse measurement. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to measure.

Specifies the input terminal of the signal to measure. The NI-DAQmx driver returned an error.

Specifies the input terminal configuration.

Specifies the input terminal configuration. The NI-DAQmx driver returned an error.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the signal to measure.

Specifies whether to apply a digital filter to the signal to measure. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Specifies on which edge of the input signal to begin pulse measurement.

Specifies on which edge of the input signal to begin pulse measurement. The NI-DAQmx driver returned an error.

Specifies the terminal of the timebase to use for the counter.

Specifies the terminal of the timebase to use for the counter. The NI-DAQmx driver returned an error. Typically, NI-DAQmx uses one of the internal counter timebases when performing counter measurements. Use this property to specify an external timebase and produce custom measurement ranges that are not possible with the internal timebases. You also can use this property to chain counters together. By using the output of a counter as the timebase of another counter, you can effectively widen a counter. For example, you can chain two 24 bit counters together to produce one 48 bit counter.

Specifies in Hertz the frequency of the counter timebase. Specifying the rate of a counter timebase allows you to take measurements in terms of time or frequency rather than in ticks of the timebase. If you use an external timebase and do not specify the rate, you can take measurements only in terms of ticks of the timebase.

Specifies in Hertz the frequency of the counter timebase. Specifying the rate of a counter timebase allows you to take measurements in terms of time or frequency rather than in ticks of the timebase. If you use an external timebase and do not specify the rate, you can take measurements only in terms of ticks of the timebase. The NI-DAQmx driver returned an error.

Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge.

Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies the digital threshold value in Volts for high and low input transitions. Some devices do not support this for differential channels.

Specifies the digital threshold value in Volts for high and low input transitions. Some devices do not support this for differential channels. The NI-DAQmx driver returned an error.

Indicates the current value of the count register.

Indicates the current value of the count register. The NI-DAQmx driver returned an error.

Indicates the current state of the out terminal of the counter.

Indicates the current state of the out terminal of the counter. The NI-DAQmx driver returned an error.

Indicates whether the counter rolled over. When you query this property, NI-DAQmx resets it to .

Indicates whether the counter rolled over. When you query this property, NI-DAQmx resets it to . The NI-DAQmx driver returned an error.

Specifies the divisor for an external counter timebase. You can divide the counter timebase in order to measure slower signals without causing the count register to roll over.

Specifies the divisor for an external counter timebase. You can divide the counter timebase in order to measure slower signals without causing the count register to roll over. The NI-DAQmx driver returned an error.

Specifies the counter behavior when data is read but a new value was not detected during a sample clock.

Specifies the counter behavior when data is read but a new value was not detected during a sample clock. The NI-DAQmx driver returned an error.

Specifies the sentinel value returned when the No New Sample Behavior is set to Sentinel Value.

Specifies the sentinel value returned when the No New Sample Behavior is set to Sentinel Value. The NI-DAQmx driver returned an error.

Specifies the data transfer mode for the channel.

Specifies the data transfer mode for the channel. The NI-DAQmx driver returned an error.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer. The NI-DAQmx driver returned an error.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. The NI-DAQmx driver returned an error.

Indicates the number of samples that the device might have overwritten before it could transfer them to the buffer.

Indicates the number of samples that the device might have overwritten before it could transfer them to the buffer. The NI-DAQmx driver returned an error. On certain devices during finite buffered time measurements, it is not possible to detect if the counter overwrites a value it read before the device could transfer the sample to the buffer. This uncertainty is present only when is and occurs as the acquisition nears completion. Once the acquisition completes, it is impossible to tell if the status value on the counter indicates an overwrite as a result of a true overwrite, or because the counter detected another edge of the input signal after the acquisition completed but before the counter could disarm. As a result of this behavior, higher frequency input signals are more likely to increase the number of possibly invalid samples. To decrease the number of possibly invalid samples, read more often from the buffer. Reading from the buffer forces a check on the hardware status and ensures all data is valid up to the present point in the buffer. By default, NI-DAQmx checks the validity of data every fourth of the buffer. If you do not perform a read until after the device acquires all data, the value of this property is one-fourth of the buffer size or zero. The value this property indicates is valid only while the task is in the running state. The value of this property while the task is in any other state is zero.

Specifies whether to enable duplicate count prevention for the channel. Duplicate count prevention is enabled by default. Setting disables duplicate count prevention unless you explicitly enable it.

Specifies whether to enable duplicate count prevention for the channel. Duplicate count prevention is enabled by default. Setting disables duplicate count prevention unless you explicitly enable it. The NI-DAQmx driver returned an error.

Specifies the divisor to apply to the signal you connect to the counter source terminal. Scaled data that you read takes this setting into account. You should use a prescaler only when you connect an external signal to the counter source terminal and when that signal has a higher frequency than the fastest onboard timebase. Setting this value disables duplicate count prevention unless you explicitly set to .

Specifies the divisor to apply to the signal you connect to the counter source terminal. Scaled data that you read takes this setting into account. You should use a prescaler only when you connect an external signal to the counter source terminal and when that signal has a higher frequency than the fastest onboard timebase. Setting this value disables duplicate count prevention unless you explicitly set to . The NI-DAQmx driver returned an error.

Specifies the maximum period (in seconds) in which the device will recognize signals. For frequency measurements, a signal with a higher period than the one set in this property will return 0 Hz. For duty cycle, the device will return 0 or 1 depending on the state of the line during the max defined period of time. Period measurements will return NaN. Pulse width measurement will return zero.

Specifies the maximum period (in seconds) in which the device will recognize signals. For frequency measurements, a signal with a higher period than the one set in this property will return 0 Hz. For duty cycle, the device will return 0 or 1 depending on the state of the line during the max defined period of time. Period measurements will return NaN. Pulse width measurement will return zero. The NI-DAQmx driver returned an error.

Encapsulates one or more counter/timer output channels and the properties for a counter/timer output channel.

Use the property to create or access a counter/timer output channel. A might contain more than one virtual channel because the is defined by providing a valid NI-DAQmx channel string to the indexer or to a create channel method. If you set a property on a object that represents multiple channels, that property is set for all of the channels that the object represents.Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Indicates how to define pulses generated on the channel.

Indicates how to define pulses generated on the channel. The NI-DAQmx driver returned an error.

Specifies the resting state of the output terminal.

Specifies the resting state of the output terminal. The NI-DAQmx driver returned an error.

Specifies on which terminal to generate pulses.

Specifies on which terminal to generate pulses. The NI-DAQmx driver returned an error.

Specifies the units in which to define high and low pulse time.

Specifies the units in which to define high and low pulse time. The NI-DAQmx driver returned an error.

Specifies the amount of time that the pulse is at a high voltage. This value is in the units you specify with or when you create the channel.

Specifies the amount of time that the pulse is at a high voltage. This value is in the units you specify with or when you create the channel. The NI-DAQmx driver returned an error.

Specifies the amount of time that the pulse is at a low voltage. This value is in the units you specify with or when you create the channel.

Specifies the amount of time that the pulse is at a low voltage. This value is in the units you specify with or when you create the channel. The NI-DAQmx driver returned an error.

Specifies in seconds the amount of time to wait before generating the first pulse.

Specifies in seconds the amount of time to wait before generating the first pulse. The NI-DAQmx driver returned an error.

Specifies the duty cycle of the pulses. The duty cycle of a signal is the width of the pulse divided by period. NI-DAQmx uses this ratio and the pulse frequency to determine the width of the pulses and the delay between pulses.

Specifies the duty cycle of the pulses. The duty cycle of a signal is the width of the pulse divided by period. NI-DAQmx uses this ratio and the pulse frequency to determine the width of the pulses and the delay between pulses. The NI-DAQmx driver returned an error.

Specifies the units in which to define pulse frequency.

Specifies the units in which to define pulse frequency. The NI-DAQmx driver returned an error.

Specifies the frequency of the pulses to generate. This value is in the units you specify with or when you create the channel.

Specifies the frequency of the pulses to generate. This value is in the units you specify with or when you create the channel. The NI-DAQmx driver returned an error.

Specifies in seconds the amount of time to wait before generating the first pulse.

Specifies in seconds the amount of time to wait before generating the first pulse. The NI-DAQmx driver returned an error.

Specifies the number of ticks the pulse is high.

Specifies the number of ticks the pulse is high. The NI-DAQmx driver returned an error.

Specifies the number of ticks the pulse is low.

Specifies the number of ticks the pulse is low. The NI-DAQmx driver returned an error.

Specifies the number of ticks to wait before generating the first pulse.

Specifies the number of ticks to wait before generating the first pulse. The NI-DAQmx driver returned an error.

Specifies the terminal of the timebase to use for the counter. Typically, NI-DAQmx uses one of the internal counter timebases when generating pulses. Use this property to specify an external timebase and produce custom pulse widths that are not possible using the internal timebases.

Specifies the terminal of the timebase to use for the counter. Typically, NI-DAQmx uses one of the internal counter timebases when generating pulses. Use this property to specify an external timebase and produce custom pulse widths that are not possible using the internal timebases. The NI-DAQmx driver returned an error.

Specifies in Hertz the frequency of the counter timebase. Specifying the rate of a counter timebase allows you to define output pulses in seconds rather than in ticks of the timebase. If you use an external timebase and do not specify the rate, you can define output pulses only in ticks of the timebase.

Specifies in Hertz the frequency of the counter timebase. Specifying the rate of a counter timebase allows you to define output pulses in seconds rather than in ticks of the timebase. If you use an external timebase and do not specify the rate, you can define output pulses only in ticks of the timebase. The NI-DAQmx driver returned an error.

Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge.

Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Indicates the current value of the count register.

Indicates the current value of the count register. The NI-DAQmx driver returned an error.

Indicates the current state of the output terminal of the counter.

Indicates the current state of the output terminal of the counter. The NI-DAQmx driver returned an error.

Specifies a number of timebase ticks by which to increase the time spent in the idle state for each successive pulse.

Specifies a number of timebase ticks by which to increase the time spent in the idle state for each successive pulse. The NI-DAQmx driver returned an error. When this value is greater than 0, NI-DAQmx generates progressively longer pulses until the count register rolls over. At that point, the generated pulses return to the original pulse width and grow progressively longer until the count register rolls over again. Use this property to provide a clock to an analog input channel for equivalent time sampling (ETS). ETS is a data acquisition technique in which data on a periodic waveform with a frequency higher than the Nyquist frequency of the system is obtained by sampling the waveform at instants in time skewed in relation to the beginning of each period of the waveform.

Specifies the divisor for an external counter timebase. You can divide the counter timebase in order to generate slower signals without causing the count register to roll over.

Specifies the divisor for an external counter timebase. You can divide the counter timebase in order to generate slower signals without causing the count register to roll over. The NI-DAQmx driver returned an error.

Indicates if the task completed pulse generation. Use this value for retriggerable pulse generation when you need to determine if the device generated the current pulse. For retriggerable tasks, when you query this property, NI-DAQmx resets it to .

Indicates if the task completed pulse generation. Use this value for retriggerable pulse generation when you need to determine if the device generated the current pulse. For retriggerable tasks, when you query this property, NI-DAQmx resets it to . The NI-DAQmx driver returned an error.

Specifies whether to apply the initial delay to retriggered pulse trains.

Specifies whether to apply the initial delay to retriggered pulse trains. The NI-DAQmx driver returned an error.

Specifies constraints to apply when the counter generates pulses. Constraining the counter reduces the device resources required for counter operation. Constraining the counter can also allow additional analog or counter tasks on the device to run concurrently. For continuous counter tasks, NI-DAQmx consumes no device resources when the counter is constrained. For finite counter tasks, resource use increases with the frequency regardless of the constraint mode. However, fixed frequency constraints significantly reduce resource usage, and fixed duty cycle constraint marginally reduces it.

Specifies constraints to apply when the counter generates pulses. Constraining the counter reduces the device resources required for counter operation. Constraining the counter can also allow additional analog or counter tasks on the device to run concurrently. For continuous counter tasks, NI-DAQmx consumes no device resources when the counter is constrained. For finite counter tasks, resource use increases with the frequency regardless of the constraint mode. However, fixed frequency constraints significantly reduce resource usage, and fixed duty cycle constraint marginally reduces it. The NI-DAQmx driver returned an error.

Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory directly after you start the task. Onboard memory includes data FIFOs.

Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory directly after you start the task. Onboard memory includes data FIFOs. The NI-DAQmx driver returned an error.

Specifies the data transfer mode for the device. For buffered operations, use DMA or USB Bulk. For non-buffered operations, use Polled.

Specifies the data transfer mode for the device. For buffered operations, use DMA or USB Bulk. For non-buffered operations, use Polled. The NI-DAQmx driver returned an error.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device. The NI-DAQmx driver returned an error.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device.

Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. The NI-DAQmx driver returned an error.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash.

Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. The NI-DAQmx driver returned an error.

Specifies the divisor to apply to the signal you connect to the counter source terminal. Pulse generations defined by frequency or time take this setting into account, but pulse generations defined by ticks do not. You should use a prescaler only when you connect an external signal to the counter source terminal and when that signal has a higher frequency than the fastest onboard timebase.

Specifies the divisor to apply to the signal you connect to the counter source terminal. Pulse generations defined by frequency or time take this setting into account, but pulse generations defined by ticks do not. You should use a prescaler only when you connect an external signal to the counter source terminal and when that signal has a higher frequency than the fastest onboard timebase. The NI-DAQmx driver returned an error.

Indicates whether the counter is ready for new continuous pulse train values.

Indicates whether the counter is ready for new continuous pulse train values. The NI-DAQmx driver returned an error.

Contains properties and methods that configure the sample timing and duration of the .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Sets the source of the sample clock, the rate of the sample clock, and the number of samples to acquire or generate.

The source terminal of the clock. To use the internal clock of the device, set this value to . The sampling rate in samples per second. If you use an external source for the sample clock, set this input to the maximum expected rate of that clock. The edges of sample clock pulses on which to acquire or generate samples. The duration of the task. A task is either finite and stops once the specified number of samples have been acquired or generated, or it is continuous and continues to acquire or generate samples until the task is explicitly stopped. The number of samples to acquire or generate if is . If sample mode is , NI-DAQmx uses this value to determine the buffer size. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. this method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . You cannot apply this method to a subset of devices in the task, and you must apply this method to the task as a whole. You must call this method on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception. Before calling this method, you must configure channels on the task using one of the channel collection properties (for example, on ).

Determines the sample timing and duration of the task with the specified number of samples, using standard 8255/82C55 digital handshaking between the device and a peripheral device.

The duration of the task. A task is either finite and stops once the specified number of samples has been acquired or generated, or it is continuous and continues to acquire or generate samples until the task is explicitly stopped. The number of samples to acquire or generate for each channel in the task if is . If is , NI-DAQmx uses this value to determine the buffer size. Use this method if the task requires a finite number of samples. These devices support handshake timing. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . You cannot apply this method to a subset of devices in the task, and you must apply this method to the task as a whole. You must call this method on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception. The NI-DAQmx driver returned an error.

Sets only the duration of the task and the number of samples to acquire or generate without specifying timing.

The duration of the task. A task is either finite and stops once the specified number of samples have been acquired or generated, or it is continuous and continues to acquire or generate samples until the task is explicitly stopped. The number of samples to acquire or generate for each channel in the task if is . For finite counter output tasks, is the number of pulses to generate. If sample mode is , NI-DAQmx uses this value to determine the buffer size. Typically, you use implicit timing when sample timing is not required for the task, such as for a task that uses counters for buffered frequency measurement, buffered period measurement, or pulse train generation. Use this method if the task requires a finite number of samples. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . You cannot apply this method to a subset of devices in the task, and you must apply this method to the task as a whole. You must call this method on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception. The NI-DAQmx driver returned an error.

Sets the source of the sample clock and the rate of the sample clock.

The source terminal of the clock. To use the internal clock of the device, set this value to . The sampling rate in samples per second. If you use an external source for the sample clock, set this input to the maximum expected rate of that clock. The edges of sample clock pulses on which to acquire or generate samples. The duration of the task. A task is either finite and stops once the specified number of samples have been acquired or generated, or it is continuous and continues to acquire or generate samples until the task is explicitly stopped. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . You cannot apply this method to a subset of devices in the task, and you must apply this method to the task as a whole. You must call this method on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception. Before calling this method, you must configure channels on the task using one of the channel collection properties (for example, on ).

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Sets only the duration of the task without specifying timing.

The duration of the task. A task is either finite and stops once the specified number of samples have been acquired or generated, or it is continuous and continues to acquire or generate samples until the task is explicitly stopped. Typically, you use implicit timing when sample timing is not required for the task, such as for a task that uses counters for buffered frequency measurement, buffered period measurement, or pulse train generation. Use this method for continuous operations. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . You cannot apply this method to a subset of devices in the task, and you must apply this method to the task as a whole. You must call this method on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception. The NI-DAQmx driver returned an error.

Determines the sample timing and duration of the task using standard 8255/82C55 digital handshaking between the device and a peripheral device.

The duration of the task. A task is either finite and stops once the specified number of samples has been acquired or generated, or it is continuous and continues to acquire or generate samples until the task is explicitly stopped. Use this method for continuous operations. These devices support handshake timing. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . You cannot apply this method to a subset of devices in the task, and you must apply this method to the task as a whole. You must call this method on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception. The NI-DAQmx driver returned an error.

Configures the task to acquire samples on the rising and/or falling edges of the specified lines or ports.

The names of the digital lines or ports on which to detect rising edges. The lines or ports must be contained in the task. You can specify a string that defines a list or range of channels for this parameter. The names of the digital lines or ports on which to detect falling edges. The lines or ports must be contained in the task. You can specify a string that defines a list or range of channels for this parameter. The duration of the task. A task is either finite and stops when the specified number of samples have been acquired, or it is continuous and continues to acquire samples until the task is explicitly stopped. The NI-DAQmx driver returned an error. Use this method to configure a task to continuously acquire samples using change detection timing. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task. You start the task with , by reading from or writing to the task, or by calling with . You cannot apply this method to a subset of devices in the task, and you must apply this method to the task as a whole. You must call this method on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception.

Configures the task to acquire samples on the rising and/or falling edges of the specified lines or ports and sets the number of samples to acquire.

The names of the digital lines or ports on which to detect rising edges. The lines or ports must be contained in the task. You can specify a string that defines a list or range of channels for this parameter. The names of the digital lines or ports on which to detect falling edges. The lines or ports must be contained in the task. You can specify a string that defines a list or range of channels for this parameter. The duration of the task. A task is either finite and stops when the specified number of samples have been acquired, or it is continuous and continues to acquire samples until the task is explicitly stopped. The number of samples to acquire from each channel in the task if is . If is , NI-DAQmx uses this value to determine the buffer size. The NI-DAQmx driver returned an error. Use this method to configure a task to acquire a finite number of samples using change detection timing.The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .You cannot apply this method to a subset of devices in the task, and you must apply this method to the task as a whole. You must call this method on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception.

Gets an instance of .

The instance. You cannot apply to a subset of devices in the task and you must apply to the task as a whole. Call on the instance of returned from the property on the class. Accessing on instances of returned from the property throws an exception.

Determines when the DAQ device transfers data to a peripheral device, using an imported sample clock to control burst handshake timing.

The source terminal of the sample clock. To use the internal clock of the device, set this value to . The rate of the sample clock, in hertz. The edges of the sample clock pulses on which to acquire or generate samples. Specifies whether the task pauses while the trigger signal is high or low. The active level for the data transfer event. The duration of the task. A task is either finite and stops once the specified number of samples has been acquired or generated, or it is continuous and continues to acquire or generate samples until the task is explicitly stopped. The number of samples to acquire or generate for each channel in the task if is . If is , NI-DAQmx uses this value to determine the buffer size. These devices support burst handshake timing for digital I/O. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . You cannot apply to a subset of devices in the task, and you must apply to the task as a whole. You must call on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception. The NI-DAQmx driver returned an error.

Determines when the DAQ device transfers data to a peripheral device, using the onboard sample clock of the DAQ device to control burst handshake timing and exporting that clock for use by the peripheral device.

The terminal to which to export the sample clock. The rate of the sample clock, in hertz. Specifies whether the task pauses while the trigger signal is high or low. The active level for the data transfer event. The polarity of the exported sample clock. The duration of the task. A task is either finite and stops once the specified number of samples has been acquired or generated, or it is continuous and continues to acquire or generate samples until the task is explicitly stopped. The number of samples to acquire or generate for each channel in the task if is . If is , NI-DAQmx uses this value to determine the buffer size. These devices support burst handshake timing for digital I/O. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . You cannot apply to a subset of devices in the task, and you must apply to the task as a whole. You must call on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception. The NI-DAQmx driver returned an error.

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Gets an instance of that contains settings for only the specified devices. In Visual C#, this property is the indexer.

One or more device names that the retrieved class operates on. Use a comma to separate multiple device names. You may pass or to specify all devices in the task. The specified instance of . The NI-DAQmx driver returned an error. Use the property to retrieve an instance of that applies only to certain devices in your task. allows you to set timing properties differently on different devices in your task. If you want to set a property on all devices in the task, you can use the property of the class. This property is only supported by certain National Instruments devices. Please refer to your product-specific documentation to determine which properties, if any, you can set on a device-specific basis. Some members of the class do not apply to a subset of devices in the task and apply only to the task as a whole. You must call these members on the instance of returned from the property of the class. Accessing these members on instances of returned from this property throws an exception. These members include the property, this property, and configuration methods, like . You can use the property to determine what devices are in a task.

Sets the source of the sample clock, the rate of the sample clock, the number of samples to acquire or generate, and configures the sample clock for pipelining.

The source terminal of the clock. To use the internal clock of the device, set this value to . The sampling rate in samples per second. If you use an external source for the sample clock, set this input to the maximum expected rate of that clock. The edges of sample clock pulses on which to acquire or generate samples. The duration of the task. A task is either finite and stops once the specified number of samples have been acquired or generated, or it is continuous and continues to acquire or generate samples until the task is explicitly stopped. The number of samples to acquire or generate if is . If sample mode is , NI-DAQmx uses this value to determine the buffer size. The NI-DAQmx driver returned an error. The device acquires or generates samples on each sample clock edge, but does not respond to certain triggers until a few sample clock edges later. Pipelining allows higher data transfer rates at the cost of increased trigger response latency. Refer to the device documentation for information about which triggers pipelining affects. This timing type allows handshaking using the Pause trigger, the Ready for Transfer event, or the Data Active event. Refer to the device documentation for more information. This timing type is supported only by the NI 6536 and NI 6537.The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .You cannot apply this method to a subset of devices in the task, and you must apply this method to the task as a whole. You must call this method on the instance of returned from the property on the class. Accessing this method on instances of returned from the property throws an exception.

Specifies how the device responds to the sample clock and to triggers. This property has been deprecated in favor of the method.

Specifies how the device responds to the sample clock and to triggers. The NI-DAQmx driver returned an error.

Gets the timestamp of the first sample.

The timestamp of the first sample. The NI-DAQmx driver returned an error. The timestamp returned is expressed as a UTC time. To read this property, you must first set to . For more information on timestamps in NI-DAQmx, see Timestamps.

Gets or sets the start time of the synchronization pulse.

The start time of the synchronization pulse. The NI-DAQmx driver returned an error. The trigger time is represented by a expressed as a UTC time. To set a trigger time based on the current system time, use , adding an offset, rather than .

Indicates if samples were missed because change detection events occurred faster than the device could handle them. Some devices detect overflows differently than others.

Indicates if samples were missed because change detection events occurred faster than the device could handle them. Some devices detect overflows differently than others. The NI-DAQmx driver returned an error.

Specifies if a task acquires or generates a finite number of samples or if it continuously acquires or generates samples.

Specifies if a task acquires or generates a finite number of samples or if it continuously acquires or generates samples. The NI-DAQmx driver returned an error. For an analog input task with a Reference Trigger, you must set this property to even though the task runs continuously until the Reference Trigger occurs.

Specifies the number of samples to acquire or generate for each channel if is . If is , NI-DAQmx uses this value to determine the buffer size.

Specifies the number of samples to acquire or generate for each channel if is . If is , NI-DAQmx uses this value to determine the buffer size. The NI-DAQmx driver returned an error. To configure an analog output task to generate a finite number of cycles of a waveform, set this property to (desired number of cycles) * (number of samples per cycle). This property affects the buffer allocation for the task.

Specifies the type of sample timing to use for the task.

Specifies the type of sample timing to use for the task. The NI-DAQmx driver returned an error. Select when a hardware signal (usually a clock) must acquire or produce samples. To perform buffered edge counting, for example, select and use to specify the source of the Sample clock. Select to use bidirectional hardware signals to time the exchange of digital data between two devices. Select to run at a slower rate but with the capability for per sample evaluation of triggers and events to pause the operation. Select on supported devices to run at the maximum sample rate with a few Sample clock cycles delay before the device can respond to triggers and events. Select to acquire data only when reading from the task executes or to generate data only when writing to the task executes. Select to perform a buffered period or frequency counter measurement or to generate a finite pulse train. Select to capture data only when certain digital lines change states and without continuously transferring unnecessary data during periods of inactivity.

Specifies the sampling rate in samples per channel per second. If you use an external source for the Sample Clock, set this input to the maximum expected rate of that clock.

Specifies the sampling rate in samples per channel per second. If you use an external source for the Sample Clock, set this input to the maximum expected rate of that clock. The NI-DAQmx driver returned an error.

Indicates the maximum Sample Clock rate supported by the task, based on other timing settings. For output tasks, the maximum Sample Clock rate is the maximum rate of the DAC. For input tasks, NI-DAQmx calculates the maximum sampling rate differently for multiplexed devices than simultaneous sampling devices.

Indicates the maximum Sample Clock rate supported by the task, based on other timing settings. For output tasks, the maximum Sample Clock rate is the maximum rate of the DAC. For input tasks, NI-DAQmx calculates the maximum sampling rate differently for multiplexed devices than simultaneous sampling devices. The NI-DAQmx driver returned an error. For multiplexed devices, NI-DAQmx calculates the maximum sample clock rate based on the maximum AI Convert Clock rate unless you set . If you set that property, NI-DAQmx calculates the maximum sample clock rate based on that setting. Use to query the maximum AI Convert Clock rate. NI-DAQmx also uses the minimum sample clock delay to calculate the maximum sample clock rate unless you set . For simultaneous sampling devices, the maximum Sample Clock rate is the maximum rate of the ADC.

Specifies the terminal of the signal to use as the Sample Clock.

Specifies the terminal of the signal to use as the Sample Clock. The NI-DAQmx driver returned an error.

Specifies on which edge of a clock pulse sampling takes place. This property is useful primarily when the signal you use as the Sample Clock is not a periodic clock.

Specifies on which edge of a clock pulse sampling takes place. This property is useful primarily when the signal you use as the Sample Clock is not a periodic clock. The NI-DAQmx driver returned an error.

Specifies the action to take if Sample Clock edges occur faster than the device can handle them.

Specifies the action to take if Sample Clock edges occur faster than the device can handle them. The NI-DAQmx driver returned an error.

Specifies the action to take when the onboard memory of the device becomes empty. In either case, the sample clock does not stop.

Specifies the action to take when the onboard memory of the device becomes empty. In either case, the sample clock does not stop. The NI-DAQmx driver returned an error.

Specifies the number of Sample Clock Timebase pulses needed to produce a single Sample Clock pulse.

Specifies the number of Sample Clock Timebase pulses needed to produce a single Sample Clock pulse. The NI-DAQmx driver returned an error. The rate of the Sample Clock is equal to (frequency of Sample Clock Timebase) / (value of this property). If the Sample Clock Timebase is not a periodic clock, the value of this property determines the number of Sample Clock Timebase edges that the device must receive before producing each Sample Clock pulse. Use to specify the polarity of these edges. Setting this property has a similar effect to setting . Use when you know the rate of the Sample Clock Timebase and you want to acquire or generate samples at the specified rate. Use this property when you have an external timebase that you want to divide down and use as the Sample Clock, but you do not know rate of the external timebase.

Indicates the name of the internal Sample Clock terminal for the task. This property does not return the name of the Sample Clock source terminal specified with .

Indicates the name of the internal Sample Clock terminal for the task. This property does not return the name of the Sample Clock source terminal specified with . The NI-DAQmx driver returned an error.

Specifies the rate of the Sample Clock Timebase. Some applications require that you specify a rate when you use any signal other than the onboard Sample Clock Timebase. NI-DAQmx requires this rate to calculate other timing parameters.

Specifies the rate of the Sample Clock Timebase. Some applications require that you specify a rate when you use any signal other than the onboard Sample Clock Timebase. NI-DAQmx requires this rate to calculate other timing parameters. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the Sample Clock Timebase.

Specifies the terminal of the signal to use as the Sample Clock Timebase. The NI-DAQmx driver returned an error.

Specifies on which edge to recognize a Sample Clock Timebase pulse. This property is useful primarily when the signal you use as the Sample Clock Timebase is not a periodic clock.

Specifies on which edge to recognize a Sample Clock Timebase pulse. This property is useful primarily when the signal you use as the Sample Clock Timebase is not a periodic clock. The NI-DAQmx driver returned an error.

Specifies the number of pulses of the Master Timebase needed to produce a single pulse of the Sample Clock Timebase.

Specifies the number of pulses of the Master Timebase needed to produce a single pulse of the Sample Clock Timebase. The NI-DAQmx driver returned an error. The rate of the Sample Clock Timebase is equal to (frequency of Master Timebase) / (value of this property). The only valid values for this property are 1 and 200. Setting this property has a similar effect to setting . Use when you know the rate of the Master Timebase and you want to produce a Sample Clock Timebase at the specified rate. Use this property when you have an external Master Timebase that you want to divide down and use as the Sample Clock Timebase, but you do not know rate of that external Master Timebase.

Indicates the name of the internal Sample Clock Timebase terminal for the task. This property does not return the name of the Sample Clock Timebase source terminal specified with .

Indicates the name of the internal Sample Clock Timebase terminal for the task. This property does not return the name of the Sample Clock Timebase source terminal specified with . The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Specifies the number of seconds to wait after a handshake cycle before starting a new handshake cycle.

Specifies the number of seconds to wait after a handshake cycle before starting a new handshake cycle. The NI-DAQmx driver returned an error.

Specifies the point in the handshake cycle that the device is in when the task starts.

Specifies the point in the handshake cycle that the device is in when the task starts. The NI-DAQmx driver returned an error.

Specifies on which edge of the Handshake Trigger an input task latches the data from the peripheral device.

Specifies on which edge of the Handshake Trigger an input task latches the data from the peripheral device. The NI-DAQmx driver returned an error.

Specifies the names of the digital lines or ports on which to detect rising edges. The lines or ports must be used by virtual channels in the task. You also can specify a string that contains a list or range of digital lines or ports.

Specifies the names of the digital lines or ports on which to detect rising edges. The lines or ports must be used by virtual channels in the task. You also can specify a string that contains a list or range of digital lines or ports. The NI-DAQmx driver returned an error.

Specifies the names of the digital lines or ports on which to detect falling edges. The lines or ports must be used by virtual channels in the task. You also can specify a string that contains a list or range of digital lines or ports.

Specifies the names of the digital lines or ports on which to detect falling edges. The lines or ports must be used by virtual channels in the task. You also can specify a string that contains a list or range of digital lines or ports. The NI-DAQmx driver returned an error.

Specifies whether to tristate lines specified with and that are not in a virtual channel in the task. If you set this property to , NI-DAQmx tristates rising/falling edge lines that are not in a virtual channel in the task. If you set this property to , NI-DAQmx does not modify the configuration of rising/falling edge lines that are not in a virtual channel in the task, even if the lines were previously tristated. Set this property to to detect changes on lines in other tasks or to detect changes on output-only lines.

Specifies whether to tristate lines specified with and that are not in a virtual channel in the task. If you set this property to , NI-DAQmx tristates rising/falling edge lines that are not in a virtual channel in the task. If you set this property to , NI-DAQmx does not modify the configuration of rising/falling edge lines that are not in a virtual channel in the task, even if the lines were previously tristated. Set this property to to detect changes on lines in other tasks or to detect changes on output-only lines. The NI-DAQmx driver returned an error.

Specifies whether to update all channels in the task simultaneously, rather than updating channels independently when you write a sample to that channel.

Specifies whether to update all channels in the task simultaneously, rather than updating channels independently when you write a sample to that channel. The NI-DAQmx driver returned an error.

Specifies the action to take when the onboard memory of the device becomes empty.

Specifies the action to take when the onboard memory of the device becomes empty. The NI-DAQmx driver returned an error.

Specifies in Hertz the rate at which to clock the analog-to-digital converter. This clock is specific to the analog input section of multiplexed devices.

Specifies in Hertz the rate at which to clock the analog-to-digital converter. This clock is specific to the analog input section of multiplexed devices. The NI-DAQmx driver returned an error. By default, NI-DAQmx selects the maximum convert rate supported by the device, plus up to 10 microseconds per channel settling time. Other task settings, such as high channel counts or setting , can result in a faster default convert rate. CompactDAQ applies up to 10 microseconds of settling time for all C Series devices even if the maximum convert rates of the devices differ. If you connect signal conditioning accessories with track and hold capabilities, such as an SCXI module, to the device, NI-DAQmx uses the fastest convert rate possible that meets the settling requirements for the slowest module sampled. Refer to the device documentation for the signal conditioning accessory for more information.

Indicates the maximum convert rate supported by the task, given the current devices and channel count.

Indicates the maximum convert rate supported by the task, given the current devices and channel count. The NI-DAQmx driver returned an error. This rate is generally faster than the default AI Convert Clock rate selected by NI-DAQmx, because NI-DAQmx adds in an additional 10 microseconds per channel settling time to compensate for most potential system settling constraints. For single channel tasks, the maximum AI Convert Clock rate is the maximum rate of the ADC. For multiple channel tasks, the maximum AI Convert Clock rate is the maximum convert rate of the analog hardware, including the ADC, filters, multiplexers, and amplifiers. Signal conditioning accessories can further constrain the maximum AI Convert Clock based on timing and settling requirements.

Specifies the terminal of the signal to use as the AI Convert Clock.

Specifies the terminal of the signal to use as the AI Convert Clock. The NI-DAQmx driver returned an error.

Specifies on which edge of the clock pulse an analog-to-digital conversion takes place.

Specifies on which edge of the clock pulse an analog-to-digital conversion takes place. The NI-DAQmx driver returned an error. This property is useful primarily when the signal you use as the AI Convert Clock is not a periodic clock. For example, set this property to to perform an analog to digital conversion on each rising edge of an aperiodic signal.

Specifies the number of AI Convert Clock Timebase pulses needed to produce a single AI Convert Clock pulse.

Specifies the number of AI Convert Clock Timebase pulses needed to produce a single AI Convert Clock pulse. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the AI Convert Clock Timebase.

Specifies the terminal of the signal to use as the AI Convert Clock Timebase. The NI-DAQmx driver returned an error.

Specifies the units of .

Specifies the units of . The NI-DAQmx driver returned an error. NI-DAQmx uses the AI Convert Clock timebase to produce the delay. If you set this property to and N is the value of , N pulses of the AI Convert Clock Timebase occur after receiving a Sample Clock pulse before the acquisition of the sample begins. If you set this property to , that number of seconds elapses after receiving a Sample Clock pulse before the acquisition of the sample begins.

Specifies the amount of time to wait after receiving a Sample Clock edge before beginning to acquire the sample. This value is in the units you specify with .

Specifies the amount of time to wait after receiving a Sample Clock edge before beginning to acquire the sample. This value is in the units you specify with . The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the AI Convert Clock.

Specifies whether to apply a digital filter to the AI Convert Clock. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Specifies the rate of the Master Timebase.

Specifies the rate of the Master Timebase. The NI-DAQmx driver returned an error. This property is useful only when the source of the Master Timebase is not the onboard 20 MHz timebase. NI-DAQmx requires the Master Timebase rate to calculate other timing parameters.

Specifies the terminal of the signal to use as the Master Timebase. On an E Series device, you can choose only between the onboard 20MHz Timebase or the RTSI7 terminal.

Specifies the terminal of the signal to use as the Master Timebase. On an E Series device, you can choose only between the onboard 20MHz Timebase or the RTSI7 terminal. The NI-DAQmx driver returned an error.

Specifies the frequency of the Reference Clock.

Specifies the frequency of the Reference Clock. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the Reference Clock.

Specifies the terminal of the signal to use as the Reference Clock. The NI-DAQmx driver returned an error.

Specifies the type of sync pulse used in the task.

Specifies the type of sync pulse used in the task. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the synchronization pulse. The synchronization pulse resets the clock dividers and the ADCs/DACs on the device.

Specifies the terminal of the signal to use as the synchronization pulse. The synchronization pulse resets the clock dividers and the ADCs/DACs on the device. The NI-DAQmx driver returned an error.

Specifies the timescale to be used for timestamps for a sync pulse.

Specifies the timescale to be used for timestamps for a sync pulse. The NI-DAQmx driver returned an error.

Indicates in seconds the delay required to reset the ADCs/DACs after the device receives the synchronization pulse.

Indicates in seconds the delay required to reset the ADCs/DACs after the device receives the synchronization pulse. The NI-DAQmx driver returned an error. This time is the minimum delay required by the device between the receipt of the synchronization pulse and the start of the acquisition. Read this property for all slave devices and set for the master device to the maximum of these delays.

Specifies in seconds the amount of time that elapses after the master device issues the synchronization pulse before the task starts.

Specifies in seconds the amount of time that elapses after the master device issues the synchronization pulse before the task starts. The NI-DAQmx driver returned an error. Read for all slave devices, and set this property for the master device to the maximum of those values.

Indicates in seconds the amount of time required for the ADCs or DACs on the device to reset. When synchronizing devices, query this property on all devices and note the largest reset time. Then, for each device, subtract the value of this property from the largest reset time and set to the resulting value.

Indicates in seconds the amount of time required for the ADCs or DACs on the device to reset. When synchronizing devices, query this property on all devices and note the largest reset time. Then, for each device, subtract the value of this property from the largest reset time and set to the resulting value. The NI-DAQmx driver returned an error.

Specifies in seconds the amount of time to wait after the Synchronization Pulse before resetting the ADCs or DACs on the device. When synchronizing devices, query on all devices and note the largest reset time. Then, for each device, subtract the reset time from the largest reset time and set this property to the resulting value.

Specifies in seconds the amount of time to wait after the Synchronization Pulse before resetting the ADCs or DACs on the device. When synchronizing devices, query on all devices and note the largest reset time. Then, for each device, subtract the reset time from the largest reset time and set this property to the resulting value. The NI-DAQmx driver returned an error.

Indicates the name of the internal Synchronization Pulse terminal for the task. This property does not return the name of the source terminal.

Indicates the name of the internal Synchronization Pulse terminal for the task. This property does not return the name of the source terminal. The NI-DAQmx driver returned an error.

Specifies the interval, in Sample Clock periods, between each internal Synchronization Clock pulse. NI-DAQmx uses this pulse for synchronization of triggers between multiple devices at different rates. Refer to device documentation for information about how to calculate this value.

Specifies the interval, in Sample Clock periods, between each internal Synchronization Clock pulse. NI-DAQmx uses this pulse for synchronization of triggers between multiple devices at different rates. Refer to device documentation for information about how to calculate this value. The NI-DAQmx driver returned an error.

Specifies which timing engine to use for the task.

Specifies which timing engine to use for the task. The NI-DAQmx driver returned an error.

Specifies whether to enable the first sample timestamp.

Specifies whether to enable the first sample timestamp. The NI-DAQmx driver returned an error.

Specifies the timescale to be used for the first sample timestamp.

Specifies the timescale to be used for the first sample timestamp. The NI-DAQmx driver returned an error.

Contains properties and methods that configure how the task begins measurement or generation.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Configures the task to start acquiring or generating samples immediately upon starting the task.

The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Gets the .

The .

Gets the .

The .

Gets the .

The .

Configures the task to start acquiring or generating samples on a rising or falling edge of a digital signal.

The name of a terminal where there is a digital signal to use as the source of the trigger. The edge of the digital signal to start acquiring or generating samples. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures the task to start acquiring or generating samples when an analog signal enters or leaves a range you specify.

The name of a virtual channel or terminal where there is a digital signal to use as the source of the trigger. For E Series devices, if you use a channel name, the channel must be the first channel in the task. The only terminal you can use for E Series devices is PFI0. Specifies if the reference trigger occurs when the signal enters the window or leaves the window. Use and to specify the limits of the window. The upper limit of the voltage window, in the units of the measurement or generation. The lower limit of the voltage window, in the units of the measurement or generation. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures the task to start acquiring or generating samples when an analog signal crosses the level you specify.

The name of a virtual channel or terminal where there is a digital signal to use as the source of the trigger. For E Series devices, if you use a channel name, the channel must be the first channel in the task. The only terminal you can use for E Series devices is PFI0. The slope of the signal to start acquiring or generating samples when the signal crosses . The threshold to start acquiring or generating samples, in the units of the measurement or generation. Use to specify on which slope to trigger at this threshold. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Configures the task to start acquiring or generating samples when a digital pattern is matched.

The physical channels to use for pattern matching. The order of the physical channels determines the order of the pattern. If a port is included, the order of the physical channels within the port is in ascending order. The digital pattern that must be met for the trigger to occur. The condition under which the trigger occurs. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Gets the .

The .

Gets the .

The .

Gets the .

The .

Gets the start trigger timestamp.

The start trigger timestamp. The NI-DAQmx driver returned an error. The timestamp returned is expressed as a UTC time. For more information on timestamps in NI-DAQmx, see Timestamps.

Configures the task to start acquiring or generating samples when any of the configured analog signals cross the respective levels you specify.

A string specifying a list of terminals, physical channel names, or ranges of physical channels where there are analog signals to use as the sources of the trigger. An array containing the slopes of the signals to start acquiring or generating samples when the respective signal crosses the respective trigger level. Each element corresponds to the sources specified in and elements in the other array parameters. An array containing the thresholds at which to start acquiring or generating samples. Each element corresponds to the sources specified in and elements in the other array parameters. Specify these values in the units of the measurement or generation. Use to specify on which slopes to trigger at the respective thresholds. The NI-DAQmx driver returned an error. Multi-edge triggering treats the specified triggers as if they are logically ORed. The number of trigger sources represented by and the number of elements in and must all be the same.

Configures the task to start acquiring or generating samples at a the specified .

The start trigger time. The timescale of the . For more information, see . The NI-DAQmx driver returned an error. The trigger time is represented by a expressed as a UTC time. To set a trigger time based on the current system time, use , adding an offset, rather than .

Specifies the type of trigger to use to start a task.

Specifies the type of trigger to use to start a task. The NI-DAQmx driver returned an error.

Indicates the name of the internal Start Trigger terminal for the task. This property does not return the name of the trigger source terminal.

Indicates the name of the internal Start Trigger terminal for the task. This property does not return the name of the trigger source terminal. The NI-DAQmx driver returned an error.

Specifies whether the start trigger timestamp is enabled. If the timestamp is enabled but no resources are available, an error will be returned at run time.

Specifies whether the start trigger timestamp is enabled. If the timestamp is enabled but no resources are available, an error will be returned at run time. The NI-DAQmx driver returned an error.

Specifies the start trigger timestamp timescale.

Specifies the start trigger timestamp timescale. The NI-DAQmx driver returned an error.

Specifies an amount of time to wait after the Start Trigger is received before acquiring or generating the first sample. This value is in the units you specify with .

Specifies an amount of time to wait after the Start Trigger is received before acquiring or generating the first sample. This value is in the units you specify with . The NI-DAQmx driver returned an error.

Specifies the units of .

Specifies the units of . The NI-DAQmx driver returned an error.

Specifies whether a finite task resets and waits for another Start Trigger after the task completes. When you set this property to , the device performs a finite acquisition or generation each time the Start Trigger occurs until the task stops. The device ignores a trigger if it is in the process of acquiring or generating signals.

Specifies whether a finite task resets and waits for another Start Trigger after the task completes. When you set this property to , the device performs a finite acquisition or generation each time the Start Trigger occurs until the task stops. The device ignores a trigger if it is in the process of acquiring or generating signals. The NI-DAQmx driver returned an error.

Specifies the period of time in seconds after the task starts during which the device may trigger. Once the window has expired, the device stops detecting triggers, and the task will finish after the device finishes acquiring post-trigger samples for any triggers detected. If no triggers are detected during the entire period, then no data will be returned. Ensure the period of time specified covers the entire time span desired for trigger detection to avoid missed triggers. Specifying a Trigger Window of -1 causes the window to be infinite.

Specifies the period of time in seconds after the task starts during which the device may trigger. Once the window has expired, the device stops detecting triggers, and the task will finish after the device finishes acquiring post-trigger samples for any triggers detected. If no triggers are detected during the entire period, then no data will be returned. Ensure the period of time specified covers the entire time span desired for trigger detection to avoid missed triggers. Specifying a Trigger Window of -1 causes the window to be infinite. The NI-DAQmx driver returned an error.

Specifies the period of time in seconds after each trigger during which the device may trigger. Once the window has expired, the device stops detecting triggers, and the task will finish after the device finishes acquiring post-trigger samples that it already started. Ensure the period of time specified covers the entire time span desired for retrigger detection to avoid missed triggers. Specifying a Retrigger Window of -1 causes the window to be infinite.

Specifies the period of time in seconds after each trigger during which the device may trigger. Once the window has expired, the device stops detecting triggers, and the task will finish after the device finishes acquiring post-trigger samples that it already started. Ensure the period of time specified covers the entire time span desired for retrigger detection to avoid missed triggers. Specifying a Retrigger Window of -1 causes the window to be infinite. The NI-DAQmx driver returned an error.

Specifies the maximum number of times the task will detect a start trigger during the task. The number of times a trigger is detected and acted upon by the module may be less than the specified amount if the task stops early because of trigger/retrigger window expiration. Specifying the Maximum Number of Triggers to Detect to be 0 causes the driver to automatically set this value to the maximum possible number of triggers detectable by the device and configuration combination. Note: The number of detected triggers may be less than number of trigger events occurring, because the devices were unable to respond to the trigger.

Specifies the maximum number of times the task will detect a start trigger during the task. The number of times a trigger is detected and acted upon by the module may be less than the specified amount if the task stops early because of trigger/retrigger window expiration. Specifying the Maximum Number of Triggers to Detect to be 0 causes the driver to automatically set this value to the maximum possible number of triggers detectable by the device and configuration combination. Note: The number of detected triggers may be less than number of trigger events occurring, because the devices were unable to respond to the trigger. The NI-DAQmx driver returned an error.

Contains properties and methods that configure the trigger that creates the reference point between the pretrigger samples and the post-trigger samples.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Disables reference triggering for the measurement.

The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Gets the .

The .

Gets the .

The .

Gets the .

The .

Configures the task to stop the acquisition when the device acquires all pretrigger samples, detects a rising or falling edge of a digital signal, and acquires all post-trigger samples.

The name of the terminal where there is a digital signal to use as the source of the trigger. The edge of the digital signal on which the reference trigger occurs. The minimum number of samples to acquire per channel before recognizing the reference trigger. The number of post-trigger samples is equal to the value of minus the value of . If equals , the measurement or generation stops when the reference trigger occurs. When you use a Reference Trigger, the default value of the property is with a value of 0. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Configures the task to stop the acquisition when the device acquires all pretrigger samples; an analog signal enters or leaves a range you specify; and the device acquires all post-trigger samples.

The name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger. For E Series devices, if you use a virtual channel, it must be the only channel in the task. The only terminal you can use for E Series devices is PFI0. Specifies if the reference trigger occurs when the signal enters the window or leaves the window. Use and to specify the limits of the window. The upper limit of the voltage window, in the units of the measurement or generation. The lower limit of the voltage window, in the units of the measurement or generation. The minimum number of samples per channel to acquire before recognizing the reference trigger. The number of post-trigger samples is equal to the value of minus the value of . If equals , the measurement or generation stops when the reference trigger occurs. When you use a Reference Trigger, the default value of the property is with a value of 0. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Configures the task to stop the acquisition when the device acquires all pretrigger samples; an analog signal reaches the level you specify; and the device acquires all post-trigger samples.

The name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger. For E Series devices, if you use a virtual channel, it must be the only channel in the task. The only terminal you can use for E Series devices is PFI0. The slope of the signal on which the reference trigger occurs. The threshold, in the units of the measurement or generation, to trigger. Use to specify on which slope to trigger at this threshold. The minimum number of samples per channel to acquire before recognizing the reference trigger. The number of post-trigger samples is equal to the value of minus the value of . If equals , the measurement or generation stops when the reference trigger occurs. When you use a Reference Trigger, the default value of the property is with a value of 0. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Configures a task to stop the acquisition when the device acquires all pretrigger samples, matches a digital pattern, and acquires all posttrigger samples.

The physical channels to use for pattern matching. The order of the physical channels determines the order of the pattern. If a port is included, the order of the physical channels within the port is in ascending order. The digital pattern that must be met for the trigger to occur. The condition under which the trigger occurs. The minimum number of samples to acquire per channel before recognizing the reference trigger. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Gets the .

The .

Gets the .

The .

Gets the reference trigger timestamp.

The reference trigger timestamp. The NI-DAQmx driver returned an error. The timestamp returned is expressed as a UTC time. For more information on timestamps in NI-DAQmx, see Timestamps.

Configures the task to stop the acquisition when the device acquires all pretrigger samples, any of the configured analog signals reaches the levels you specify, and the device acquires all post-trigger samples.

A string specifying a list of terminals, physical channel names, or ranges of physical channels where there are analog signals to use as the sources of the trigger. An array containing the slopes of the signals to start acquiring or generating samples when the respective signal crosses the respective trigger level. Each element corresponds to the sources specified in and elements in the other array parameters. An array containing the thresholds at which to start acquiring or generating samples. Each element corresponds to the sources specified in and elements in the other array parameters. Specify these values in the units of the measurement or generation. Use to specify on which slopes to trigger at the respective thresholds. The minimum number of samples per channel to acquire before recognizing the reference trigger. The number of posttrigger samples per channel is equal to minus . The NI-DAQmx driver returned an error. When you use a , the default for is with a of 0. Multi-edge triggering treats the specified triggers as if they are logically ORed. The number of trigger sources represented by and the number of elements in and must all be the same.

Specifies the type of trigger to use to mark a reference point for the measurement.

Specifies the type of trigger to use to mark a reference point for the measurement. The NI-DAQmx driver returned an error.

Specifies the minimum number of pretrigger samples to acquire from each channel before recognizing the reference trigger. Post-trigger samples per channel are equal to minus the number of pretrigger samples per channel.

Specifies the minimum number of pretrigger samples to acquire from each channel before recognizing the reference trigger. Post-trigger samples per channel are equal to minus the number of pretrigger samples per channel. The NI-DAQmx driver returned an error.

Indicates the name of the internal Reference Trigger terminal for the task. This property does not return the name of the trigger source terminal.

Indicates the name of the internal Reference Trigger terminal for the task. This property does not return the name of the trigger source terminal. The NI-DAQmx driver returned an error.

Specifies whether to send a software trigger to the device when a hardware trigger is no longer active in order to prevent a timeout.

Specifies whether to send a software trigger to the device when a hardware trigger is no longer active in order to prevent a timeout. The NI-DAQmx driver returned an error.

Indicates whether a completed acquisition was triggered by the auto trigger. If an acquisition has not completed after the task starts, this property returns . This property is only applicable when is .

Indicates whether a completed acquisition was triggered by the auto trigger. If an acquisition has not completed after the task starts, this property returns . This property is only applicable when is . The NI-DAQmx driver returned an error.

Specifies whether the reference trigger timestamp is enabled. If the timestamp is enabled but no resources are available, an error will be returned at run time.

Specifies whether the reference trigger timestamp is enabled. If the timestamp is enabled but no resources are available, an error will be returned at run time. The NI-DAQmx driver returned an error.

Specifies the reference trigger timestamp timescale.

Specifies the reference trigger timestamp timescale. The NI-DAQmx driver returned an error.

Specifies in seconds the time to wait after the device receives the Reference Trigger before switching from pretrigger to posttrigger samples.

Specifies in seconds the time to wait after the device receives the Reference Trigger before switching from pretrigger to posttrigger samples. The NI-DAQmx driver returned an error.

Specifies whether a finite task resets, acquires pretrigger samples, and waits for another Reference Trigger after the task completes. When you set this property to TRUE, the device will acquire post-trigger samples, reset, and acquire pretrigger samples each time the Reference Trigger occurs until the task stops. The device ignores a trigger if it is in the process of acquiring signals.

Specifies whether a finite task resets, acquires pretrigger samples, and waits for another Reference Trigger after the task completes. When you set this property to TRUE, the device will acquire post-trigger samples, reset, and acquire pretrigger samples each time the Reference Trigger occurs until the task stops. The device ignores a trigger if it is in the process of acquiring signals. The NI-DAQmx driver returned an error.

Specifies the duration in seconds after the task starts during which the device may trigger. Once the window has passed, the device stops detecting triggers, and the task will stop after the device finishes acquiring post-trigger samples that it already started. If no triggers are detected during the entire period, then no data will be returned. Specifying a Trigger Window of -1 causes the window to be infinite.

Specifies the duration in seconds after the task starts during which the device may trigger. Once the window has passed, the device stops detecting triggers, and the task will stop after the device finishes acquiring post-trigger samples that it already started. If no triggers are detected during the entire period, then no data will be returned. Specifying a Trigger Window of -1 causes the window to be infinite. The NI-DAQmx driver returned an error.

Specifies the duration in seconds after each trigger during which the device may trigger. Once the window has passed, the device stops detecting triggers, and the task will stop after the device finishes acquiring post-trigger samples that it already started. Specifying a Retrigger Window of -1 causes the window to be infinite.

Specifies the duration in seconds after each trigger during which the device may trigger. Once the window has passed, the device stops detecting triggers, and the task will stop after the device finishes acquiring post-trigger samples that it already started. Specifying a Retrigger Window of -1 causes the window to be infinite. The NI-DAQmx driver returned an error.

Specifies the maximum number of times the task will detect a reference trigger during the task. The number of times a trigger is detected and acted upon by the module may be less than the specified amount if the task stops early because of trigger/retrigger window expiration. Specifying the Maximum Number of Triggers to Detect to be 0 causes the driver to automatically set this value to the maximum possible number of triggers detectable by the device and configuration combination. Note: The number of detected triggers may be less than number of trigger events occurring, because the devices were unable to respond to the trigger.

Specifies the maximum number of times the task will detect a reference trigger during the task. The number of times a trigger is detected and acted upon by the module may be less than the specified amount if the task stops early because of trigger/retrigger window expiration. Specifying the Maximum Number of Triggers to Detect to be 0 causes the driver to automatically set this value to the maximum possible number of triggers detectable by the device and configuration combination. Note: The number of detected triggers may be less than number of trigger events occurring, because the devices were unable to respond to the trigger. The NI-DAQmx driver returned an error.

Contains properties and methods that configure how the switch task advances to the next entry in the scan list and causes the switch to advance programmatically.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Gets the .

The .

Disables advance triggering for the task.

The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures a task to advance to the next entry in a scan list upon a rising or falling edge of a digital signal.

The terminal of the trigger signal. The edge of the trigger signal that causes an advance trigger to occur. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Configures a task to advance to the next entry in a scan list upon a software trigger.

The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Sends a notification to the hardware from the running program to advance to the next entry in the switch scan list.

The name of the software trigger to generate. The NI-DAQmx driver returned an error.

(Deprecated) Specifies the type of trigger to use to advance to the next entry in a switch scan list.

(Deprecated) Specifies the type of trigger to use to advance to the next entry in a switch scan list. The NI-DAQmx driver returned an error.

Contains properties and methods that configure signals and triggers that pause a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Gets the .

The .

Gets the .

The .

Gets the .

The .

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Disables pause triggering for the task. Once started, samples are acquired or generated until the requested number has been acquired or generated, or the task has stopped.

The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures the task to pause acquisition or generation based on the level of a digital signal.

The name of a terminal where there is a digital signal to use as the source of the trigger. The level of the digital signal that pauses acquiring or generating samples. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures the task to pause acquisition or generation when an analog signal is inside or outside of a range you specify.

The name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger. Specifies if the task pauses acquiring and generating samples when the signal is inside the window or outside the window. Use and to specify the limits of the window. The upper limit of the voltage window, in the units of the measurement or generation. The lower limit of the voltage window, in the units of the measurement or generation. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures the task to pause acquisition or generation when an analog signal is above or below a level you specify.

The name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger. Specifies if the task pauses acquiring and generating samples when the signal is below or above . The analog threshold level, in the units of the measurement or generation. Use to specify if the task pauses above or below this threshold. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures a task to pause the acquisition or generation when the device matches a digital pattern.

The physical channels to use for pattern matching. The order of the physical channels determines the order of the pattern. If a port is included, the order of the physical channels within the port is in ascending order. The digital pattern that must be met for the trigger to occur. The condition under which the trigger occurs. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task. You start the task with , by reading from or writing to the task, or by calling with .

Gets the .

The .

Specifies the type of trigger to use to pause a task.

Specifies the type of trigger to use to pause a task. The NI-DAQmx driver returned an error.

Indicates the name of the internal Pause Trigger terminal for the task. This property does not return the name of the trigger source terminal.

Indicates the name of the internal Pause Trigger terminal for the task. This property does not return the name of the trigger source terminal. The NI-DAQmx driver returned an error.

Represents a collection of virtual channels and their per-channel properties and timing, triggering, and other properties that apply to the DAQmx Task.

is the principal class that represents the channels, timing, triggering, exported signals, and other information about an NI-DAQmx task. For most tasks, in addition to the object, you must create an instance of a reader or writer class to read samples from or write samples to the of the task. To create a reader or writer for a particular , pass the property of that to the reader or writer constructor. Some DAQ devices are not currently supported by the NI-DAQmx driver. Refer to NI-DAQ Readme for a complete listing of supported hardware. Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples. Tasks

Initializes a new instance of the class with the specified name.

The name of the task to create. If you specify or , the NI-DAQmx driver assigns a unique name to the new task. The NI-DAQmx driver returned an error. This constructor creates a new task in the current process. To load a task from Measurement Automation Explorer (MAX), use the method on the instance of .

Gets the timing configurations for the task.

The for the task.

Gets the triggers for the task.

The for the task.

Transitions the task to the running state, which begins the measurement or generation.

If you do not use this method, a measurement task starts automatically when you call a read method. How you set the write method parameter determines if calling the write method automatically starts a generation task. If you do not use and when you use a read or write method multiple times, the task starts and stops repeatedly, which reduces the performance of the application. Refer to When Should You Use the Start Function for more information. The NI-DAQmx driver returned an error.

Transitions the task from the running to the committed state, which ends the measurement or generation.

If you do not use this method, the read method ends a measurement task automatically before returning. How you set the parameter of the write method determines if calling the write method automatically ends a generation task before returning. If you do not use and when you use a read or write method multiple times, the task starts and stops repeatedly, which reduces the performance of the application. If an asynchronous read or write on the task is in progress, does not return until the data from the pending read or write has been transferred to or from the task buffer. does not wait for read or write asynchronous callback methods to finish, however. You may pass to the method stop the task immediately, without waiting for any currently running operation to complete. The NI-DAQmx driver returned an error.

Gets the exported signal configuration for the task.

The for the task.

Gets the switch scan configuration for the task.

The for the task.

Alters the state of the task according to the mode you specify.

The action to use to alter the state of the task. To start a task more quickly, set to to program the hardware with all parameters of the task prior to starting it. If the task is in the running state and an asynchronous read or write on the task is in progress, calling to move the task out of the running state does not return until the data from the pending read or write has been transferred to or from the task buffer. However, if is , then does not wait for the asynchronous read or write callback methods to finish. The pending asynchronous call stops immediately and raises a . The NI-DAQmx driver returned an error.

Gets the stream for the task.

The for the task.

Gets the collection of counter output channels in the task.

A that contains the objects in the task. Each task can contain only one type of channel. You must use the channels property that corresponds to the type of channels in the task to access the channels in the task.

Gets the collection of counter input channels in the task.

A that contains the objects in the task. Each task can contain only one type of channel. You must use the channels property that corresponds to the type of channels in the task to access the channels in the task.

Gets the collection of digital output channels in the task.

An that contains the objects in the task. Each task can contain only one type of channel. You must use the channels property that corresponds to the type of channels in the task to access the channels in the task.

Gets the collection of digital input channels in the task.

A that contains the objects in the task. Each task can contain only one type of channel. You must use the channels property that corresponds to the type of channels in the task to access the channels in the task.

Gets the collection of analog output channels in the task.

An that contains the objects in the task. Each task can contain only one type of channel. You must use the channels property that corresponds to the type of channels in the task to access the channels in the task.

Gets the collection of analog input channels in the task.

An that contains the objects in the task. Each task can contain only one type of channel. You must use the channels property that corresponds to the type of channels in the task to access the channels in the task.

Adds a preconfigured, global channel to the task.

The name of the global channel to add to the task. The global . A task can contain global or local channels. Global channels are accessible to all tasks on the system. Local channels are accessible only to the task you use to create them. Use local channels in a typical application. Use the create channel methods on , , , , , or to create local channels and add them to the task. Use Measurement & Automation Explorer (MAX) to create, configure, and store global channels. The NI-DAQmx driver returned an error.

Waits for the measurement or generation to complete and returns if it has completed execution before the specified time elapses.

The maximum amount of time in milliseconds to wait for the measurement or generation to complete. This method returns an error if the time elapses. If you set the timeout to -1, the method always waits for the task to complete, regardless of the amount of time needed. if the task has completed execution. waits for the task to finish acquiring or generating the number of samples per channel specified on the class. does not wait for pending asynchronous operations to complete. Use the methods and properties on the to verify that asynchronous reads and writes are complete. The NI-DAQmx driver returned an error.

Releases all resources used by .

The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Waits for the measurement or generation to complete and returns if it has completed execution before the specified elapses.

The maximum to wait for the measurement or generation to complete. This method returns an error if the time elapses. if the task has completed execution. waits for the task to finish acquiring or generating the number of samples per channel specified on the class. does not wait for pending asynchronous operations to complete. Use the methods and properties on the to verify that asynchronous reads and writes are complete. The NI-DAQmx driver returned an error.

Gets the watchdog configuration and control object for the task.

The for the task.

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. By default, callbacks are executed from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or .For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. For more information about the effects and purpose of , refer to Events. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries Events

Occurs when a digital change is detected on any of the digital lines used in the task.

The NI-DAQmx driver returned an error. For more information about events in NI-DAQmx, refer to Events. Events

Occurs when any of the counters used in the task reaches its terminal count.

The NI-DAQmx driver returned an error. For more information about events in NI-DAQmx, refer to Events. Events

Occurs when each sample is acquired into the NI-DAQmx driver buffer and is ready for reading.

The NI-DAQmx driver returned an error. For more information about events in NI-DAQmx, refer to Events. Events

Occurs when the task completes.

The NI-DAQmx driver returned an error. This event occurs whether the task completed successfully or stopped prematurely due to an error. If the task stops due to a call to or , this event does not occur. For more information about events in NI-DAQmx, refer to Events. Events

Raises the event.

A that contains the event data. The NI-DAQmx driver returned an error. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries Raising an Event

Occurs on each pulse of the task's sample clock.

The NI-DAQmx driver returned an error. For more information about events in NI-DAQmx, refer to Events. Events

Raises the event.

A that contains the event data. The NI-DAQmx driver returned an error. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries Raising an Event

Raises the event.

A that contains the event data. The NI-DAQmx driver returned an error. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries Raising an Event

Raises the event.

A that contains the event data. The NI-DAQmx driver returned an error. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries Raising an Event

Raises the event.

A that contains the event data. The NI-DAQmx driver returned an error. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries Raising an Event

Initializes a new instance of the class with a unique name.

The NI-DAQmx driver returned an error. This constructor creates a new task in the current process. To load a task from Measurement Automation Explorer (MAX), use the method on the instance of .

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Waits for the measurement or generation to complete, regardless of the amount of time needed, and returns if it has completed execution.

if the task has completed execution. waits for the task to finish acquiring or generating the number of samples per channel specified on the class. does not wait for pending asynchronous operations to complete. Use the methods and properties on to verify that asynchronous reads and writes are complete. The NI-DAQmx driver returned an error.

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Configures logging to a .tdms file when the acquisition starts.

The path to the .tdms file to which you want to log data. If you use this method to create a new file, the file extension of the filename you specify in must be .tdms. Otherwise, this method automatically appends .tdms to the filename you specify. If you use this method to open or update an existing file, you do not have to ensure that the file extension is .tdms. A value that specifies how to open the .tdms file. A value that specifies how to log data. When you enable TDMS logging, NI-DAQmx streams the data acquired to the specified file once the acquisition starts. The data written on the file is in TDMS file format, and the driver also creates a TDMS index file. The name of the TDMS channel group that the driver creates is the same as the task name. Refer to TDMS Streaming for more information.

Configures logging to a .tdms file when the acquisition starts with the specified TDMS channel group name.

The path to the .tdms file to which you want to log data. If you use this method to create a new file, the file extension of the filename you specify in must be .tdms. Otherwise, this method automatically appends .tdms to the filename you specify. If you use this method to open or update an existing file, you do not have to ensure that the file extension is .tdms. A value which specifies how to open the .tdms file. A value which specifies how to log data. The name of the channel group to create within the .tdms file for data from this task. When set to , , or a string with only white space, the driver sets the TDMS channel group name to the task name. When you enable TDMS logging, NI-DAQmx streams the data acquired to the specified file once the acquisition starts. The data written on the file is in TDMS file format, and the driver also creates a TDMS index file. Refer to TDMS Streaming for more information.

Starts a new TDMS file the next time data is written to disk.

The path to the TDMS file to which you want to log data.

Raises the event.

An that contains the event data. The NI-DAQmx driver returned an error. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries Raising an Event

Raises the event.

An that contains the event data. The NI-DAQmx driver returned an error. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries Raising an Event

Gets or sets the interval, in number of samples per channel, at which is called.

The interval, in number of samples. If this property is set to zero, registering the event is not successful.

Gets or sets the interval, in number of samples per channel, at which is called.

The interval, in number of samples per channel. If this property is set to zero, registering the event is not successful.

Occurs when N number of samples per channel, as defined by , have been written from the PC buffer to the device.

The NI-DAQmx driver returned an error. You must set to a value greater than zero before registering this event. For more information about events in NI-DAQmx, refer to Events. Events

Occurs when N number of samples per channel, as defined by , is written from the device to the PC buffer.

The NI-DAQmx driver returned an error. You must set to a value greater than zero before registering this event. For more information about events in NI-DAQmx, refer to Events. Events

Waits until the specified has a value.

The timestamp event type to wait on. For more information see . The maximum amount of time to wait for a valid timestamp. To wait indefinitely, use the overload of this method that does not take a timeout. The requested timestamp value. The NI-DAQmx driver returned an error. To avoid an exception, use this method to ensure a timestamp has a valid value before querying it. To use this method, you must first enable timestamps for the timestamp event type specified by . The following code demonstrates how to do this for . // Using an instance of Task called 'myTask'. myTask.Triggers.StartTrigger.TimestampEnable = true; myTask.Start(); myTimestamp = myTask.WaitForValidTimestamp(TimestampEvent.StartTrigger); ' Using an instance of Task called 'myTask'. myTask.Triggers.StartTrigger.TimestampEnable = True myTask.Start() myTimestamp = myTask.WaitForValidTimestamp(TimestampEvent.StartTrigger) If the provided was less than .

Waits indefinitely until the specified has a value.

Specifies the timestamp event type to wait on. For more information see . The requested timestamp value. The NI-DAQmx driver returned an error. To avoid an exception, use this method to ensure a timestamp has a valid value before querying it. To use this method, you must first enable timestamps for the timestamp event type specified by . The following code demonstrates how to do this for . // Using an instance of Task called 'myTask'. myTask.Triggers.StartTrigger.TimestampEnable = true; myTask.Start(); myTimestamp = myTask.WaitForValidTimestamp(TimestampEvent.StartTrigger); ' Using an instance of Task called 'myTask'. myTask.Triggers.StartTrigger.TimestampEnable = True myTask.Start() myTimestamp = myTask.WaitForValidTimestamp(TimestampEvent.StartTrigger)

Indicates an array containing the names of all devices in the task.

Indicates an array containing the names of all devices in the task. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates whether the task completed execution.

Indicates whether the task completed execution. The NI-DAQmx driver returned an error.

Indicates if any devices in the task detected the insertion or removal of an accessory since the task started. Reading this property clears the accessory change status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if any devices in the task detected the insertion or removal of an accessory since the task started. Reading this property clears the accessory change status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates the names of any devices that detected the insertion or removal of an accessory since the task started. You must read before you read this property. Otherwise, you will receive an error.

Indicates the names of any devices that detected the insertion or removal of an accessory since the task started. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Represents the exception that is thrown when an NI-DAQmx driver error occurs.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples. NI-DAQmx Driver Error Codes

Initializes a new instance of the class.

NI-DAQmx Driver Error Codes

Initializes a new instance of the class with the specified error message.

The error message that explains the cause of the exception. NI-DAQmx Driver Error Codes

Initializes a new instance of the class with the specified error message and a reference to the inner exception that is the cause of the exception.

The error message that explains the cause of the exception. The exception that caused this exception. NI-DAQmx Driver Error Codes

Gets the NI-DAQmx driver code for the error that occurred.

The NI-DAQmx driver code for the error that occurred. Refer to NI-DAQmx Driver Error Codes for a list of possible values. NI-DAQmx Driver Error Codes

Creates a new instance of the class with serialized data.

The object that holds the serialized object data. The contextual information about the source or destination. This constructor is called during deserialization to reconstitute the exception object transmitted over a stream. For more information, refer to XML and SOAP Serialization in the Microsoft .NET Framework documentation.

Initializes a new instance of the class with the specified error message and NI-DAQmx driver error code.

The error message that explains the cause of the exception. The NI-DAQmx driver error code that caused this exception to be thrown. Refer to NI-DAQmx Driver Error Codes for a list of possible values. NI-DAQmx Driver Error Codes

Initializes a new instance of the class with the specified error message, NI-DAQmx driver error code, and reference to the inner exception that is the cause of the exception.

The error message that explains the cause of the exception. The NI-DAQmx driver error code that caused this exception to be thrown. Refer to NI-DAQmx Driver Error Codes for a list of possible values. The exception that caused this exception. NI-DAQmx Driver Error Codes

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Encapsulates a DAQ device and contains methods and properties that operate on devices outside the context of a task.

Dim dev as Device dev = DaqSystem.Local.LoadDevice("dev1") dev.SelfCalibrate() Device dev = DaqSystem.Local.LoadDevice("dev1"); dev.SelfCalibrate(); Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples. You can use the class to perform operations on an NI-DAQmx device. You cannot instantiate the class directly. Instead, use the method to obtain an instance of the class. For example, you can self-calibrate an NI-DAQmx device with the class.

Immediately aborts all active tasks associated with a device and returns the device to an initialized state.

Aborting a task stops the task and releases any resources the task reserved. The NI-DAQmx driver returned an error.

Gets a class for this device that contains properties and methods specific to switch devices.

A class for this device that contains properties and methods specific to switch devices.

Gets the name of the device, as configured in Measurement Automation Explorer (MAX), to which this operation applies.

The name of the device in MAX. The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Releases all resources used by .

The NI-DAQmx driver returned an error. Use this method only if the application you create runs on a low memory system.

Measures the onboard reference voltage of the device and adjusts the self-calibration constants to account for any error caused by short-term fluctuation in the operating environment.

The NI-DAQmx driver returned an error.

Sets the self-calibration constants of the device to the current external calibration constants.

National Instruments sets the external calibration constants at the factory, and those constants remain in effect until you perform a new external calibration on the device. The NI-DAQmx driver returned an error.

Starts an external calibration session on a device.

The current calibration password for the device. The default password for all NI products is NI. A reference to the . The NI-DAQmx driver returned an error.

Changes the external calibration password of the device.

The current calibration password for the device. The default password for all NI products is NI. The new password for the device. This password can be no longer than four characters. The NI-DAQmx driver returned an error.

Gets the last date and time that the device underwent an external calibration.

The date and time of the external calibration. The NI-DAQmx driver returned an error.

Gets the last date and time that the device underwent a self-calibration.

The date and time of the self-calibration. The NI-DAQmx driver returned an error.

Gets an array that contains the names of the physical channels on this device.

The types of physical channels to include. The access types of physical channels to include. An array that contains the names of the requested physical channels on this device. The NI-DAQmx driver returned an error.

Gets an array that contains the names of the terminals on this device.

The types of terminals to include. An array that contains the names of the requested terminals on this device. The NI-DAQmx driver returned an error.

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Indicates the digital output trigger types supported by this device.

A that indicates the digital output trigger types supported by this device. The default value is a bitwise combination of , , , , , , and . The NI-DAQmx driver returned an error.

Indicates the digital input trigger types supported by this device.

A that indicates the digital input trigger types supported by this device. The default value is a bitwise combination of , , , , , , and . The NI-DAQmx driver returned an error.

Indicates the counter output trigger types supported by this device.

A that indicates the counter output trigger types supported by this device. The value is a bitwise combination of , , , , , , and . The NI-DAQmx driver returned an error.

Indicates the counter input trigger types supported by this device.

A that indicates the counter input trigger types supported by this device. The value is a bitwise combination of , , , , , , and . The NI-DAQmx driver returned an error.

Indicates the analog output trigger types supported by this device.

A that indicates the analog output trigger types supported by this device. The value is a bitwise combination of , , , , , , and . The NI-DAQmx driver returned an error.

Indicates the coupling types supported by this device.

A that indicates the coupling types supported by this device. The value is a bitwise combination of , , , and . The NI-DAQmx driver returned an error.

Indicates the analog input trigger types supported by this device.

A that indicates the analog input trigger types supported by this device. The value is a bitwise combination of , , , , , , and . The NI-DAQmx driver returned an error.

Performs a brief test of the device resources. If a failure occurs, refer to your device documentation for more information.

The NI-DAQmx driver returned an error.

Reserves the Network DAQ device for the current host. Reservation is required to run NI-DAQmx tasks, and the device must be added in MAX before it can be reserved. Use this method to specify whether to override an existing reservation.

The NI-DAQmx driver returned an error. This functionality is performed implicitly for the NI 9163, so this method is not supported on the NI 9163 carrier. Specifies whether an existing reservation on the device should be overridden by this reservation.

Reserves the Network DAQ device for the current host. Reservation is required to run NI-DAQmx tasks, and the device must be added in MAX before it can be reserved. This method does not override any existing reservations on the device.

The NI-DAQmx driver returned an error. This functionality is performed implicitly for the NI 9163, so this method is not supported on the NI 9163 carrier.

Unreserves or releases a Network DAQ device previously reserved by the host.

The NI-DAQmx driver returned an error.

Deletes a Network DAQ device previously added to the host.

The NI-DAQmx driver returned an error. If the device is reserved, the device is unreserved before it is removed.

Gets the available connections on an SC Express accessory for the specified physical channel(s).

The physical channel(s) to use. An array of strings representing the available connections on an SC Express accessory for the specified physical channel(s). Connections specify how channels on the SC Express accessory should be configured. The resulting configuration connects channels to a particular external signal or an onboard terminal.

Gets sample modes supported by devices that support sample clocked counter output.

The values of the supported of the device.

Gets the generation types supported by the physical channels of the device.

The values of the supported of the device.

Gets sample modes supported by devices that support sample clocked counter input.

The values of the supported of the device.

Gets the measurement types supported by the physical channels of the device.

The values of the supported of the device.

Gets sample modes supported by devices that support sample clocked analog output.

The values of the supported of the device.

Gets generation types supported by the physical channels of the device.

The values of the supported of the device.

Gets the sample modes from devices that support sample clocked analog input.

The values of the supported of the device. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries.

Gets the measurement types supported by the physical channels of the device.

The values of the supported of the device.

Indicates whether the device supports self-calibration.

Indicates whether the device supports self-calibration. The NI-DAQmx driver returned an error.

Indicates in degrees Celsius the temperature of the device at the time of the last self-calibration. Compare this temperature to the current onboard temperature to determine if you should perform another calibration.

Indicates in degrees Celsius the temperature of the device at the time of the last self-calibration. Compare this temperature to the current onboard temperature to determine if you should perform another calibration. The NI-DAQmx driver returned an error. The temperature returned by this property is the calibration temperature as measured by an onboard temperature sensor and may differ from the temperature displayed on a printed calibration certificate. Calibration certificates usually display the ambient temperature rather than the onboard temperature. Using Traditional NI-DAQ (Legacy) to perform calibration does not update this property. This property is updated only when you use NI-DAQmx to perform calibration.

Indicates in months the National Instruments recommended interval between each external calibration of the device.

Indicates in months the National Instruments recommended interval between each external calibration of the device. The NI-DAQmx driver returned an error.

Indicates in degrees Celsius the temperature of the device at the time of the last external calibration. Compare this temperature to the current onboard temperature to determine if you should perform another calibration.

Indicates in degrees Celsius the temperature of the device at the time of the last external calibration. Compare this temperature to the current onboard temperature to determine if you should perform another calibration. The NI-DAQmx driver returned an error. The temperature returned by this property is the calibration temperature as measured by an onboard temperature sensor and may differ from the temperature displayed on a printed calibration certificate. Calibration certificates usually display the ambient temperature rather than the onboard temperature. Using Traditional NI-DAQ (Legacy) to perform calibration does not update this property. This property is updated only when you use NI-DAQmx to perform calibration.

Specifies a string that contains arbitrary, user-defined information. This number of characters in this string can be no more than .

Specifies a string that contains arbitrary, user-defined information. This number of characters in this string can be no more than . The NI-DAQmx driver returned an error.

Indicates the maximum length in characters of .

Indicates the maximum length in characters of . The NI-DAQmx driver returned an error.

Indicates in degrees Celsius the current temperature of the device.

Indicates in degrees Celsius the current temperature of the device. The NI-DAQmx driver returned an error.

Specifies the number of times a particular connection that results in tangible wear and tear of onboard components has been made on the accessory. This connection count is useful for tracking accessory life and usage.

Specifies the number of times a particular connection that results in tangible wear and tear of onboard components has been made on the accessory. This connection count is useful for tracking accessory life and usage. The NI-DAQmx driver returned an error.

Indicates the recommended connection count limit for an accessory. If the accessory connection count exceeds this limit, the accessory could require maintenance.

Indicates the recommended connection count limit for an accessory. If the accessory connection count exceeds this limit, the accessory could require maintenance. The NI-DAQmx driver returned an error.

Indicates if the device is a simulated device.

Indicates if the device is a simulated device. The NI-DAQmx driver returned an error.

Indicates the product category of the device. This category corresponds to the category displayed in MAX when creating NI-DAQmx simulated devices.

Indicates the product category of the device. This category corresponds to the category displayed in MAX when creating NI-DAQmx simulated devices. The NI-DAQmx driver returned an error.

Indicates the product name of the device.

Indicates the product name of the device. The NI-DAQmx driver returned an error.

Indicates the unique hardware identification number for the device.

Indicates the unique hardware identification number for the device. The NI-DAQmx driver returned an error.

Indicates the serial number of the device. This value is zero if the device does not have a serial number.

Indicates the serial number of the device. This value is zero if the device does not have a serial number. The NI-DAQmx driver returned an error.

Indicates the model names of accessories connected to the device. Each array element corresponds to a connector. For example, index 0 corresponds to connector 0. The array contains an empty string for each connector with no accessory connected.

Indicates the model names of accessories connected to the device. Each array element corresponds to a connector. For example, index 0 corresponds to connector 0. The array contains an empty string for each connector with no accessory connected. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the unique hardware identification number for accessories connected to the device. Each array element corresponds to a connector. For example, index 0 corresponds to connector 0. The array contains 0 for each connector with no accessory connected.

Indicates the unique hardware identification number for accessories connected to the device. Each array element corresponds to a connector. For example, index 0 corresponds to connector 0. The array contains 0 for each connector with no accessory connected. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the serial number for accessories connected to the device. Each array element corresponds to a connector. For example, index 0 corresponds to connector 0. The array contains 0 for each connector with no accessory connected.

Indicates the serial number for accessories connected to the device. Each array element corresponds to a connector. For example, index 0 corresponds to connector 0. The array contains 0 for each connector with no accessory connected. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the serial number of the device carrier. This value is zero if the carrier does not have a serial number.

Indicates the serial number of the device carrier. This value is zero if the carrier does not have a serial number. The NI-DAQmx driver returned an error.

Indicates an array containing the names of the modules in the chassis.

Indicates an array containing the names of the modules in the chassis. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device supports analog triggering.

Indicates if the device supports analog triggering. The NI-DAQmx driver returned an error.

Indicates if the device supports digital triggering.

Indicates if the device supports digital triggering. The NI-DAQmx driver returned an error.

Indicates whether the device supports time triggering.

Indicates whether the device supports time triggering. The NI-DAQmx driver returned an error.

Indicates an array containing the names of the analog input physical channels available on the device.

Indicates an array containing the names of the analog input physical channels available on the device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the maximum rate for an analog input task if the task contains only a single channel from this device.

Indicates the maximum rate for an analog input task if the task contains only a single channel from this device. The NI-DAQmx driver returned an error.

Indicates the maximum sampling rate for an analog input task from this device. To find the maximum rate for the task, take the minimum of or the indicated sampling rate of this device divided by the number of channels to acquire data from (including cold-junction compensation and autozero channels).

Indicates the maximum sampling rate for an analog input task from this device. To find the maximum rate for the task, take the minimum of or the indicated sampling rate of this device divided by the number of channels to acquire data from (including cold-junction compensation and autozero channels). The NI-DAQmx driver returned an error.

Indicates the minimum rate for an analog input task on this device. NI-DAQmx returns a warning or error if you attempt to sample at a slower rate.

Indicates the minimum rate for an analog input task on this device. NI-DAQmx returns a warning or error if you attempt to sample at a slower rate. The NI-DAQmx driver returned an error.

Indicates if the device supports simultaneous sampling.

Indicates if the device supports simultaneous sampling. The NI-DAQmx driver returned an error.

Indicates pairs of input voltage ranges supported by this device. Each pair consists of the low value, followed by the high value.

Indicates pairs of input voltage ranges supported by this device. Each pair consists of the low value, followed by the high value. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the set of discrete internal voltage excitation values supported by this device. If the device supports ranges of internal excitation values, use to determine supported excitation values.

Indicates the set of discrete internal voltage excitation values supported by this device. If the device supports ranges of internal excitation values, use to determine supported excitation values. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates pairs of internal voltage excitation ranges supported by this device. Each pair consists of the low value, followed by the high value. If the device supports a set of discrete internal excitation values, use to determine the supported excitation values.

Indicates pairs of internal voltage excitation ranges supported by this device. Each pair consists of the low value, followed by the high value. If the device supports a set of discrete internal excitation values, use to determine the supported excitation values. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates in coulombs pairs of input charge ranges for the device. Each pair consists of the low value followed by the high value.

Indicates in coulombs pairs of input charge ranges for the device. Each pair consists of the low value followed by the high value. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the pairs of current input ranges supported by this device. Each pair consists of the low value, followed by the high value.

Indicates the pairs of current input ranges supported by this device. Each pair consists of the low value, followed by the high value. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the set of discrete internal current excitation values supported by this device.

Indicates the set of discrete internal current excitation values supported by this device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates pairs of input voltage ratio ranges, in volts per volt, supported by devices that acquire using ratiometric measurements. Each pair consists of the low value followed by the high value.

Indicates pairs of input voltage ratio ranges, in volts per volt, supported by devices that acquire using ratiometric measurements. Each pair consists of the low value followed by the high value. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the pairs of frequency input ranges supported by this device. Each pair consists of the low value, followed by the high value.

Indicates the pairs of frequency input ranges supported by this device. Each pair consists of the low value, followed by the high value. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the input gain settings supported by this device.

Indicates the input gain settings supported by this device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the set of discrete lowpass cutoff frequencies supported by this device. If the device supports ranges of lowpass cutoff frequencies, use to determine supported frequencies.

Indicates the set of discrete lowpass cutoff frequencies supported by this device. If the device supports ranges of lowpass cutoff frequencies, use to determine supported frequencies. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates pairs of lowpass cutoff frequency ranges supported by this device. Each pair consists of the low value, followed by the high value. If the device supports a set of discrete lowpass cutoff frequencies, use to determine the supported frequencies.

Indicates pairs of lowpass cutoff frequency ranges supported by this device. Each pair consists of the low value, followed by the high value. If the device supports a set of discrete lowpass cutoff frequencies, use to determine the supported frequencies. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the AI digital filter types supported by the device.

Indicates the AI digital filter types supported by the device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the set of discrete lowpass cutoff frequencies supported by this device. If the device supports ranges of lowpass cutoff frequencies, use AI.DigFltr.Lowpass.CutoffFreq.RangeVals to determine supported frequencies.

Indicates the set of discrete lowpass cutoff frequencies supported by this device. If the device supports ranges of lowpass cutoff frequencies, use AI.DigFltr.Lowpass.CutoffFreq.RangeVals to determine supported frequencies. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates pairs of lowpass cutoff frequency ranges supported by this device. Each pair consists of the low value, followed by the high value. If the device supports a set of discrete lowpass cutoff frequencies, use AI.DigFltr.Lowpass.CutoffFreq.DiscreteVals to determine the supported frequencies.

Indicates pairs of lowpass cutoff frequency ranges supported by this device. Each pair consists of the low value, followed by the high value. If the device supports a set of discrete lowpass cutoff frequencies, use AI.DigFltr.Lowpass.CutoffFreq.DiscreteVals to determine the supported frequencies. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates an array containing the names of the analog output physical channels available on the device.

Indicates an array containing the names of the analog output physical channels available on the device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device supports the sample clock timing type for analog output tasks.

Indicates if the device supports the sample clock timing type for analog output tasks. The NI-DAQmx driver returned an error.

Indicates the maximum analog output rate of the device.

Indicates the maximum analog output rate of the device. The NI-DAQmx driver returned an error.

Indicates the minimum analog output rate of the device.

Indicates the minimum analog output rate of the device. The NI-DAQmx driver returned an error.

Indicates pairs of output voltage ranges supported by this device. Each pair consists of the low value, followed by the high value.

Indicates pairs of output voltage ranges supported by this device. Each pair consists of the low value, followed by the high value. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates pairs of output current ranges supported by this device. Each pair consists of the low value, followed by the high value.

Indicates pairs of output current ranges supported by this device. Each pair consists of the low value, followed by the high value. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the output gain settings supported by this device.

Indicates the output gain settings supported by this device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates an array containing the names of the digital input lines available on the device.

Indicates an array containing the names of the digital input lines available on the device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates an array containing the names of the digital input ports available on the device.

Indicates an array containing the names of the digital input ports available on the device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the maximum digital input rate of the device.

Indicates the maximum digital input rate of the device. The NI-DAQmx driver returned an error.

Indicates an array containing the names of the digital output lines available on the device.

Indicates an array containing the names of the digital output lines available on the device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates an array containing the names of the digital output ports available on the device.

Indicates an array containing the names of the digital output ports available on the device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the maximum digital output rate of the device.

Indicates the maximum digital output rate of the device. The NI-DAQmx driver returned an error.

Indicates an array containing the names of the counter input physical channels available on the device.

Indicates an array containing the names of the counter input physical channels available on the device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device supports the sample clock timing type for counter input tasks.

Indicates if the device supports the sample clock timing type for counter input tasks. The NI-DAQmx driver returned an error.

Indicates in bits the size of the counters on the device.

Indicates in bits the size of the counters on the device. The NI-DAQmx driver returned an error.

Indicates in hertz the maximum counter timebase frequency.

Indicates in hertz the maximum counter timebase frequency. The NI-DAQmx driver returned an error.

Indicates an array containing the names of the counter output physical channels available on the device.

Indicates an array containing the names of the counter output physical channels available on the device. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device supports Sample Clock timing for counter output tasks.

Indicates if the device supports Sample Clock timing for counter output tasks. The NI-DAQmx driver returned an error.

Indicates in bits the size of the counters on the device.

Indicates in bits the size of the counters on the device. The NI-DAQmx driver returned an error.

Indicates in hertz the maximum counter timebase frequency.

Indicates in hertz the maximum counter timebase frequency. The NI-DAQmx driver returned an error.

Indicates whether the device supports hardware TEDS.

Indicates whether the device supports hardware TEDS. The NI-DAQmx driver returned an error.

Indicates the number of DMA channels on the device.

Indicates the number of DMA channels on the device. The NI-DAQmx driver returned an error.

Indicates the bus type of the device.

Indicates the bus type of the device. The NI-DAQmx driver returned an error.

Indicates the PCI bus number of the device.

Indicates the PCI bus number of the device. The NI-DAQmx driver returned an error.

Indicates the PCI slot number of the device.

Indicates the PCI slot number of the device. The NI-DAQmx driver returned an error.

Indicates the PXI chassis number of the device, as identified in MAX.

Indicates the PXI chassis number of the device, as identified in MAX. The NI-DAQmx driver returned an error.

Indicates the PXI slot number of the device.

Indicates the PXI slot number of the device. The NI-DAQmx driver returned an error.

Indicates the name of the CompactDAQ chassis that contains this module.

Indicates the name of the CompactDAQ chassis that contains this module. The NI-DAQmx driver returned an error.

Indicates the slot number in which this module is located in the CompactDAQ chassis.

Indicates the slot number in which this module is located in the CompactDAQ chassis. The NI-DAQmx driver returned an error.

Indicates the IPv4 hostname of the device.

Indicates the IPv4 hostname of the device. The NI-DAQmx driver returned an error.

Indicates the IPv4 address of the Ethernet interface in dotted decimal format. This property returns 0.0.0.0 if the Ethernet interface cannot acquire an address.

Indicates the IPv4 address of the Ethernet interface in dotted decimal format. This property returns 0.0.0.0 if the Ethernet interface cannot acquire an address. The NI-DAQmx driver returned an error.

Indicates the IPv4 address of the 802.11 wireless interface in dotted decimal format. This property returns 0.0.0.0 if the wireless interface cannot acquire an address.

Indicates the IPv4 address of the 802.11 wireless interface in dotted decimal format. This property returns 0.0.0.0 if the wireless interface cannot acquire an address. The NI-DAQmx driver returned an error.

Indicates the number of time triggers available on the device.

Indicates the number of time triggers available on the device. The NI-DAQmx driver returned an error.

Indicates the number of timestamp engines available on the device.

Indicates the number of timestamp engines available on the device. The NI-DAQmx driver returned an error.

Encapsulates a custom scale that translates between prescaled quantities in device units and quantities scaled to the units of interest.

is the base class for , , , and . All instances of are of one of the derived class types. Refer to the derived class documentation for more information. When you create a scale, you must provide the scale with a name because the scale is associated with channels through its name. You can create and configure a scale in Measurement Automation Explorer (MAX) or with the constructor of a class that derives from . Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Gets the name of the scale.

A that represents the name of the scale. The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Releases all resources used by .

The NI-DAQmx driver returned an error. Use this method only if the application you create runs on a low memory system.

Gets the type of scale.

The type of scale.

Creates a new instance of the class with the specified scale name.

The name of the scale. This constructor is only for the use of classes derived from . To load a scale from Measurement Automation Explorer (MAX), use the method on the instance of .

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Specifies a description for the scale.

Specifies a description for the scale. The NI-DAQmx driver returned an error.

Specifies the units to use for scaled values. You can use an arbitrary string.

Specifies the units to use for scaled values. You can use an arbitrary string. The NI-DAQmx driver returned an error.

Specifies the units of the values that you want to scale.

Specifies the units of the values that you want to scale. The NI-DAQmx driver returned an error.

Encapsulates a linear custom scale that scales values using the equation y = mx + b.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Initializes a new instance of the class that scales values using the equation y = mx + b, where x is the prescaled value, and y is the scaled value.

The name of the custom scale for later use, such as when you create a virtual channel. The slope, m, in the equation. The y-intercept, b, in the equation. The NI-DAQmx driver returned an error. The equation is identical for input and output. If the equation is in the form x = my + b, you must first solve for y in terms of x.

Specifies the slope, m, in the equation y=mx+b.

Specifies the slope, m, in the equation y=mx+b. The NI-DAQmx driver returned an error.

Specifies the y-intercept, b, in the equation y=mx+b.

Specifies the y-intercept, b, in the equation y=mx+b. The NI-DAQmx driver returned an error.

Provides data for the event.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Gets a message that describes the warning.

A message that describes the warning.

Gets the NI-DAQmx driver code for the warning that occurred. Zero means no warning occurred.

The NI-DAQmx driver code for the warning that occurred. Refer to NI-DAQmx Driver Error Codes for a list of possible values. NI-DAQmx Driver Error Codes

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Contains methods that access tasks, scales, and global channels stored in Measurement Automation Explorer (MAX), performs immediate operations on DAQ hardware, and creates classes from which you can get information about the hardware.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples. You can use the class to get information about an NI-DAQmx system or perform operations on an NI-DAQmx system. You cannot instantiate the class directly, instead, use the static property to retrieve an instance of the class. The class contains methods and properties that you can use to determine information about an NI-DAQmx system. For example, the following code displays all of the NI-DAQmx tasks that are stored in Measurement Automation Explorer (MAX): 'Print the name of each task saved in MAX to the console For Each taskName As string In DaqSystem.Local.Tasks Console.WriteLine(taskName) Next //Print the name of each task saved in MAX to the console foreach (string taskName in DaqSystem.Local.Tasks) { Console.WriteLine(taskName); }

Loads a scale that is stored in Measurement Automation Explorer (MAX).

The name of the scale to load. A that represents the scale that is stored in MAX. The NI-DAQmx driver returned an error. You can use the property to get a list of custom scales on the system.

Loads a task that is stored in Measurement Automation Explorer (MAX).

The name of the task to load. A that represents the task that is stored in MAX. The NI-DAQmx driver returned an error. You can use the property to get a list of tasks on the system.

Creates a that you can use to control the specified device or get information about that device.

The name of the device. A that represents the device. The NI-DAQmx driver returned an error. You can use the property to get a list of devices installed on the system.

Removes signal routes you created by using .

The originating terminal of the route. The receiving terminal of the route. This method cannot remove task-based routes, such as those you create through timing and triggering configuration. When this method is called, it immediately unreserves the route. This type of routing is called immediate routing. The NI-DAQmx driver returned an error.

Sets a terminal to high-impedance state.

The terminal on the I/O connector to set to high-impedance state. If you connect an external signal to a terminal on the I/O connector, the terminal must be in high-impedance state. Otherwise, the device could double-drive the terminal and damage the hardware. If you call this method on a terminal in an active route, the method fails and reports no error back to the user. sets all terminals on the I/O connector to high-impedance state, but also clears any active tasks associated with the device. The NI-DAQmx driver returned an error.

Creates a that you can use to get the switch channel capabilities and set the usage type for the switch channel.

The name of the switch channel. A that represents the switch channel. The NI-DAQmx driver returned an error.

Creates a new switch scanning task with the sequence specified in the scan list.

The name of the task to create. If you specify or , the NI-DAQmx driver assigns a unique name to the new task. The sequence of connections and disconnections for the task. This sequence is specified using a special syntax. The that this method creates. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Makes one or more connections between switch channels as specified by the connection list.

A list of connections to make between switch channels. This list uses a special syntax. If , this method waits for the switches to settle before returning. If , the method returns immediately after the operation. This settling time is controlled through the property. You can specify only the two endpoints, or you can specify the explicit path between two endpoints. This method can make connections on multiple devices, but each individual connection must reside on a single device. In the event of an error, connecting stops at the point in the list where the error occurred. The NI-DAQmx driver returned an error.

Makes a connection between two switch channels.

The first channel to connect. The second channel to connect. If , this method waits for the switches to settle before returning. If , the method returns immediately after the operation. This settling time is controlled through the property. The NI-DAQmx driver returned an error.

Terminates one or more connections between switch channels as specified by the disconnection list.

A list of switch connections to terminate. This list uses a special syntax. If , this method waits for the switches to settle before returning. If , the method returns immediately after the operation. This settling time is controlled through the property. The NI-DAQmx driver returned an error.

Terminates a connection between two channels.

The first channel in the connection. The second channel in the connection. If , this method waits for the switches to settle before returning. If , the method returns immediately after the operation. This settling time is controlled through the property. The NI-DAQmx driver returned an error.

Returns information about the path between two switch channels.

The first channel in the connection. The second channel in the connection. If the channels are connected, this method returns the path by which they are connected. If the channels are not connected, the method returns a path by which they can be connected, if one is available. The NI-DAQmx driver returned an error.

Opens the specified relays.

A set of relays to open. You can specify a string that contains a comma-delimited list of relays. If , this method waits for the switches to settle before returning. If , the method returns immediately after the operation. This settling time is controlled through the property. When you operate relays directly, you circumvent the protection that channel usage types offer. Avoid using this method when you use the or methods because this method does not pass the changes that you make to those methods. The NI-DAQmx driver returned an error.

Closes the specified relays.

A set of relays to close. You can specify a string that contains a comma-delimited list of relays. If , this method waits for the switches to settle before returning. If , the method returns immediately after the operation. This settling time is controlled through the property. When you operate relays directly, you circumvent the protection that channel usage types offer. Avoid using this method when you use the or methods because this method does not pass the changes that you make to those methods. The NI-DAQmx driver returned an error.

Returns the number of times a relay has actuated on switches that support querying the relay count.

The number of times the relay has been activated. The relay you want to query. You must wait for the switch to settle before this method can determine an accurate relay count. Use this method to track relay lifetime and usage. The NI-DAQmx driver returned an error.

Returns the number of times a set of relays have actuated.

The number of times each specified relay has been activated. The order of this array corresponds to the order of . The set of relays you want to query. You can use a string that contains a comma-delimited list of relays. You must wait for the switch to settle before this method can determine an accurate relay count. Use this method to track relay lifetime and usage. The NI-DAQmx driver returned an error.

Returns the current position of a single relay.

The position of the relay. The relay you want to query. The NI-DAQmx driver returned an error.

Returns the current position of a set of relays.

The position of each specified relay. The order of this array corresponds to the order of . The set of relays you want to query. You can use a string that contains a comma-delimited list of relays. The NI-DAQmx driver returned an error.

Gets the for the last event that occurred.

The for the event. The NI-DAQmx driver returned an error. This property returns information only about warnings that occur in the thread from which the property is accessed. This behavior distinguishes warnings that are caused by actions in one thread from warnings that are caused by independent actions that occur at the same time in another thread.

Occurs when the NI-DAQmx driver issues a warning.

Gets an instance of the class that represents the local DAQ system.

An instance of the class. The NI-DAQmx driver returned an error.

Creates a route between a source and destination terminal with the specified signal modification.

The originating terminal of the route. The receiving terminal of the route. Specifies if the signal routed from the source terminal to the destination terminal is inverted. If the device is not capable of signal inversion or if a previous route reserved the inversion circuitry in an incompatible configuration, attempting to invert the signal causes an error. The route can carry a variety of digital signals such as triggers, clocks, and hardware events. These source and destination terminals can be on different devices, as long as a connecting public bus, such as RTSI or the PXI backplane, is available. This method does not modify a task. When the method is called, the route is immediately reserved and committed to hardware. This type of routing is called immediate routing. The NI-DAQmx driver returned an error.

Creates a route between a source and destination terminal.

The originating terminal of the route. The receiving terminal of the route. The route can carry a variety of digital signals such as triggers, clocks, and hardware events. These source and destination terminals can be on different devices, as long as a connecting public bus, such as RTSI or the PXI backplane, is available. This method does not modify a task. When the method is called, the route is immediately reserved and committed to hardware. This type of routing is called immediate routing. The NI-DAQmx driver returned an error.

Terminates all active connections on the device, which places the relays into the topology reset state.

The switch device on which connections are to be terminated. If , this method waits for the switches to settle before returning. If , the method returns immediately after the operation. This settling time is controlled through the property. You can use this method to terminate connections made by , , or . This method does not alter the settling time or channel usage settings. To reset those settings, use . The NI-DAQmx driver returned an error.

Objects in the NI-DAQmx API call this method to indicate that a warning condition occurred. To get notification of warnings, attach an event handler to the event.

the object that generated the event. The that contains event data.

Updates the power up states to which to set digital physical channels on a device when the device powers up or when you reset the device.

The name, as configured in Measurement Automation Explorer (MAX), of the device to which this operation applies. The digital lines or ports for which to set new power up states. Each value in this array specifies a virtual channel string that is assigned the power up state at the corresponding position in the parameter. You cannot set power up states for dedicated digital input lines. You can specify a string that contains a list or range of digital lines or ports. The physical channels and power up states to set. Each value in this array applies to the virtual channel name at the corresponding position of the parameter. The NI-DAQmx driver returned an error. Power up states are stored in EEPROMs that you can write to only a limited number of times. Therefore, you should use this method as infrequently as possible. This method writes to the EEPROM only if a setting you request is different from the one currently stored on the EEPROM. This method writes power up states in the sequential order of the power up states array. Therefore, any physical channels with multiple entries in that array use the highest array index.

Updates the power up states to which to set analog physical channels on a device when the device powers up or when you reset the device.

The name, as configured in Measurement Automation Explorer (MAX), of the device to which this operation applies. The voltage channels for which to set new power up values. Each value in this array specifies a virtual channel string that is assigned the voltage at the corresponding position in the parameter. You can set voltage power up states only for physical channels that support voltage output. The voltages to set. Each value in this array applies to the virtual channel name at the corresponding position of the parameter. You can set voltage power up states only for physical channels that support voltage output. The current channels for which to set new power up values. Each value in this array specifies a virtual channel string that is assigned the current at the corresponding position in the parameter. You can set current power up states only for physical channels that support current output. The currents to set. Each value in this array applies to the virtual channel name at the corresponding position of the parameter. You can set current power up states only for physical channels that support current output. The NI-DAQmx driver returned an error. Power up states are stored in EEPROMs that you can write to only a limited number of times. Therefore, you should use this method as infrequently as possible. This method writes to the EEPROM only if a setting you request is different from the one currently stored on the EEPROM. This method writes power up states in the sequential order of the power up states array. Therefore, any physical channels with multiple entries in that array use the highest array index. When you call this method, you can choose to not set either voltages or currents by passing in for the voltage or current parameters, but not both.

Creates a task to configure and control the watchdog timer of a static DIO device. The timer activates when you start the task.

The name of the task to create. If you specify or , the NI-DAQmx driver assigns a unique name to the new task. The name of the device for which to create a watchdog timer task. The amount of time in seconds until the watchdog timer expires. A value of -1 means the internal timer never expires. Set to -1 if you use an Expiration Trigger to expire the watchdog task. The physical channel names for which to define watchdog expiration states. Each value in this vector specifies a physical channel string that is assigned the expiration state at the corresponding position in the parameter. You cannot modify the expiration state of dedicated digital input physical channels. The state to which to set the digital physical channel when the watchdog timer expires. The that this method creates. The NI-DAQmx driver returned an error. Use the properties and methods on and to configure and control the watchdog timer task.

Creates a that you can use to configure and retrieve TEDS information for the specified physical channel.

The name of the physical channel. A that represents the physical channel. The NI-DAQmx driver returned an error.

Determines if a hardware-timed single-point read or write operation is overdue on the current thread. The property has been deprecated in favor of the method.

if a read or write is overdue for a hardware-timed single-point task being read from or written to in the current thread. The NI-DAQmx driver returned an error. The value of this property is not meaningful unless reading or writing a task that has set to . This property returns information only about warnings that occur in the thread from which the property is accessed. This behavior distinguishes warnings that are caused by actions in one thread from warnings that are caused by independent actions that occur at the same time in another thread.

Gets an array that contains the physical channel names of devices installed in the system.

The types of physical channels to include. The access types of physical channels to include. An array that contains the names of the requested physical channels in the system. The NI-DAQmx driver returned an error.

Gets an array that contains the terminal names of devices installed in the system.

The types of terminals to include. An array that contains the names of the requested terminals in the system. The NI-DAQmx driver returned an error.

Gets an array containing the names of all switch topologies.

An array of that contains the names of all switch topologies. The NI-DAQmx driver returned an error.

Gets an array that contains the switch relay names of devices installed in the system.

An array of that contains the switch relay names of devices installed in the system. The NI-DAQmx driver returned an error.

Gets an array that contains the switch channel names of devices installed in the system.

An array of that contains the switch channel names of devices installed in the system. The NI-DAQmx driver returned an error.

Creates a object that you can use to retrieve information about the specified task stored in Measurement Automation Explorer (MAX).

The name of the task stored in MAX. A object that represents the task stored in MAX. The NI-DAQmx driver returned an error.

Creates a object that you can use to retrieve information about the specified global channel stored in Measurement Automation Explorer (MAX).

The name of the global channel stored in MAX. A object that represents the global channel stored in MAX. The NI-DAQmx driver returned an error.

Creates a object that you can use to retrieve information about the specified custom scale stored in Measurement Automation Explorer (MAX).

The name of the custom scale stored in MAX. A object that represents the custom scale stored in MAX. The NI-DAQmx driver returned an error.

Saves the specified task and any local channels it contains to Measurement Automation Explorer (MAX) under the name it was given when it was created.

The task instance to save. The NI-DAQmx driver returned an error. You may save a task under a different name by calling . This method sets the option for the saved task and uses an empty string for the task . You can specify your own options and author value by using the overload. You cannot view programmatically saved tasks in the DAQ Assistant for versions of NI-DAQ earlier than 7.4. To view a programmatically saved task in an earlier version of NI-DAQ, first use the DAQ Assistant in NI-DAQ 7.4 or later to save the task. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving tasks.

Saves the specified task and any local channels it contains to Measurement Automation Explorer (MAX) under the name it was given when it was created, with specifed author and options values.

The task instance to save. A user-specified string that represents the name to store with the task. For example, tasks created with the DAQ Assistant have the string "DAQ Assistant" as their author. You may pass . One or more flags indicating various save options. The NI-DAQmx driver returned an error. You may save a task under a different name by calling . You cannot view programmatically saved tasks in the DAQ Assistant for versions of NI-DAQ earlier than 7.4. To view a programmatically saved task in an earlier version of NI-DAQ, first use the DAQ Assistant in NI-DAQ 7.4 or later to save the task. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving tasks.

Saves the task and any local channels it contains to Measurement Automation Explorer (MAX) under the specified name.

The task instance to save. The name to use for the saved task. The NI-DAQmx driver returned an error. This method sets the option for the saved task and uses an empty string for the task . You can specify your own options and author value by using the overload. You cannot view programmatically saved tasks in the DAQ Assistant for versions of NI-DAQ earlier than 7.4. To view a programmatically saved task in an earlier version of NI-DAQ, first use the DAQ Assistant in NI-DAQ 7.4 or later to save the task. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving tasks.

Saves the task and any local channels it contains to Measurement Automation Explorer (MAX) under the specified name and with specified author and options values.

The task instance to save. The name to use for the saved task. A user-specified string that represents the name to store with the task. For example, tasks created with the DAQ Assistant have the string "DAQ Assistant" as their author. You may pass . One or more flags indicating various save options. The NI-DAQmx driver returned an error. If you do not assign a value to the saved task, NI-DAQmx uses the name currently assigned to the task. You cannot view programmatically saved tasks in the DAQ Assistant for versions of NI-DAQ earlier than 7.4. To view a programmatically saved task in an earlier version of NI-DAQ, first use the DAQ Assistant in NI-DAQ 7.4 or later to save the task. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving tasks.

Deletes the specified task that is stored in Measurement Automation Explorer (MAX).

The name of the task to delete. The NI-DAQmx driver returned an error. This method does not clear the copy of the task stored in memory.

Saves the specified local or global channel to Measurement Automation Explorer (MAX) as a global channel, under the virtual name it was given when it was created.

The channel instance to save. The NI-DAQmx driver returned an error. You may save a channel under a different name by calling . This method sets the option for the saved channel and uses an empty string for the channel . You can specify your own options and author value by using the overload. You cannot view programmatically saved global channels in the DAQ Assistant for versions of NI-DAQ earlier than 7.4. To view a programmatically saved global channel in an earlier version of NI-DAQ, first use the DAQ Assistant in NI-DAQ 7.4 or later to save the global channel. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving global channels.

Saves the specified local or global channel to Measurement Automation Explorer (MAX) as a global channel, under the virtual name it was given when it was created and with specified author and options values.

The channel instance to save. A user-specified string that represents the name to store with the channel. For example, channels created with the DAQ Assistant have the string "DAQ Assistant" as their author. You may pass . One or more flags indicating various save options. The NI-DAQmx driver returned an error. You may save a channel under a different name by calling . You cannot view programmatically saved global channels in the DAQ Assistant for versions of NI-DAQ earlier than 7.4. To view a programmatically saved global channel in an earlier version of NI-DAQ, first use the DAQ Assistant in NI-DAQ 7.4 or later to save the global channel. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving global channels.

Saves the local or global channel to Measurement Automation Explorer (MAX) as a global channel, under the specified name.

The channel instance to save. The name to use for the saved channel. The NI-DAQmx driver returned an error. This method sets the option for the saved channel and uses an empty string for the channel . You can specify your own options and author value by using the overload. If you do not assign a value to the saved channel, NI-DAQmx uses the name currently assigned to the channel. You cannot view programmatically saved global channels in the DAQ Assistant for versions of NI-DAQ earlier than 7.4. To view a programmatically saved global channel in an earlier version of NI-DAQ, first use the DAQ Assistant in NI-DAQ 7.4 or later to save the global channel. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving global channels.

Saves the local or global channel to Measurement Automation Explorer (MAX) as a global channel, under the specified name and specified author and options values.

The channel instance to save. The name to use for the saved channel. A user-specified string that represents the name to store with the channel. For example, channels created with the DAQ Assistant have the string "DAQ Assistant" as their author. You may pass . One or more flags indicating various save options. The NI-DAQmx driver returned an error. If you do not assign a value to the saved channel, NI-DAQmx uses the name currently assigned to the channel. You cannot view programmatically saved global channels in the DAQ Assistant for versions of NI-DAQ earlier than 7.4. To view a programmatically saved global channel in an earlier version of NI-DAQ, first use the DAQ Assistant in NI-DAQ 7.4 or later to save the global channel. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving global channels.

Deletes the specified global channel that is stored in Measurement Automation Explorer (MAX).

The name of the global channel to delete. The NI-DAQmx driver returned an error. This method does not remove the global channel from tasks that use it.

Saves the specified custom scale to Measurement Automation Explorer (MAX) under the name it was given when it was created.

The scale instance to save. The NI-DAQmx driver returned an error. You may save a scale under a different name by calling . This method sets the option for the saved scale and uses an empty string for the scale . You can specify your own options and author value by using the overload. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving custom scales.

Saves the specified custom scale to Measurement Automation Explorer (MAX) under the name it was given when it was created and with specified author and options values.

The scale instance to save. A user-specified string that represents the name to store with the scale. For example, scales created with the DAQ Assistant have the string "DAQ Assistant" as their author. You may pass . One or more flags indicating various save options. The NI-DAQmx driver returned an error. You may save a scale under a different name by calling . Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving custom scales.

Saves the specified custom scale to Measurement Automation Explorer (MAX) under the specified name.

The scale instance to save. The name to use for the saved scale. The NI-DAQmx driver returned an error. This method sets the option for the saved scale and uses an empty string for the scale . You can specify your own options and author value by using the overload. If you do not assign a value to the saved scale, NI-DAQmx uses the name currently assigned to the scale. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving custom scales.

Saves the specified custom scale to Measurement Automation Explorer (MAX) under the specified name and with specified author and options values.

The scale instance to save. The name to use for the saved scale. A user-specified string that represents the name to store with the scale. For example, scales created with the DAQ Assistant have the string "DAQ Assistant" as their author. You may pass . One or more flags indicating various save options. The NI-DAQmx driver returned an error. If you do not assign a value to the saved scale, NI-DAQmx uses the name currently assigned to the scale. Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically saving custom scales.

Deletes the specified custom scale that is stored in Measurement Automation Explorer (MAX).

The name of the scale to delete. The NI-DAQmx driver returned an error. This method does not remove the custom scale from virtual channels that use it.

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries.

Clears the value of the property, by setting the error code to zero and the error string to a blank string.

The NI-DAQmx driver returned an error. This method clears information only about warnings that occur in the thread from which the method is called. This behavior distinguishes warnings that are caused by actions in one thread from warnings that are caused by independent actions that occur at the same time in another thread.

Returns information about the path between two switch channels, including the status of the path.

The first channel in the connection. The second channel in the connection. The status of the requested path. If the channels are connected, this method returns the path by which they are connected. If the channels are not connected, the method returns a path by which they can be connected, if one is available. The NI-DAQmx driver returned an error.

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries.

Sets the digital logic family to use when the device powers up.

The name, as configured in Measurement Automation Explorer (MAX), of the device to which this operation applies. The logic family to set the device to when it powers up. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to device documentation for information on the logic high and logic low voltages for these logic families. The NI-DAQmx driver returned an error. Power-up states are stored in non-volatile memory that you can write to only a limited number of times. Therefore, you should use this function as infrequently as possible. This function writes to the non-volatile memory only if a setting you request is different from the one currently stored on the non-volatile memory.

Adds a Network cDAQ device to the system. This method does not attempt to reserve the device after the device is successfully added.

Specifies the string containing the IP address (in dotted decimal notation) of the device to add to the system. The name to assign to the device. If unspecified, NI-DAQmx chooses the device name. Specifies the time in seconds to wait for the device to respond before timing out. MAX automatically attempts to reserve a device when the device is added, but this method does not. The NI-DAQmx driver returned an error. The device object the operation applied to.

Adds a Network cDAQ device to the system and, if specified, attempts to reserve it.

Specifies the string containing the IP address (in dotted decimal notation) of the device to add to the system. The name to assign to the device. If unspecified, NI-DAQmx chooses the device name. Specifies whether a reservation should be attempted after the device is successfully added. Specifies the time in seconds to wait for the device to respond before timing out. MAX automatically attempts to reserve a device when the device is added, but this method does not, unless is set to . The NI-DAQmx driver returned an error. The device object the operation applied to.

Sets the resistor level for lines when they are in tristate logic.

The NI-DAQmx driver returned an error. The name, as configured in Measurement Automation Explorer (MAX), of the device to which this operation applies. The digital line or port to modify. You cannot modify dedicated digital input lines. The pull up pull down level set for the physical channel specified with .

Gets the resistor level for lines when they are in tristate logic.

The NI-DAQmx driver returned an error. The name, as configured in Measurement Automation Explorer (MAX), of the device to which this operation applies. The physical channels that were modified. The pull up pull down level set for the physical channel specified with .

Gets the power up states for analog physical channels.

The NI-DAQmx driver returned an error. The name, as configured in Measurement Automation Explorer (MAX), of the device to which this operation applies. The physical channels that were modified. The power up state set for the physical channel specified with the output. The physical channels that were modified. The power up state set for the physical channel specified with the output.

Gets the power up states for digital physical lines.

The NI-DAQmx driver returned an error. The name, as configured in Measurement Automation Explorer (MAX), of the device to which this operation applies. The physical channels that were modified. The power up state set for the physical channels specified in .

Gets the digital logic family for a device.

The NI-DAQmx driver returned an error. The name, as configured in Measurement Automation Explorer (MAX), of the device to which this operation applies. Returns the that the device is set to when the device powers up.

Detects and configures cDAQ Sync connections between devices.

The names of the CompactDAQ chassis, C Series modules, or cDAQ Sync ports in comma separated form to search. If no names are specified, all cDAQ Sync ports on connected, non-simulated devices are scanned. The time in seconds to wait for the device to respond before timing out. If a timeout occurs, no configuration is changed. The configured port-to-port connections. The NI-DAQmx driver returned an error. Stop all NI-DAQmx tasks running on the devices prior to calling this method because any running tasks cause auto-configuration to fail. Auto-configure toggles lines on ports during configuration. Upon completion, all previous configurations are deleted.

Verifies configured cDAQ Sync connections between devices.

The names of the CompactDAQ chassis, C Series modules, or cDAQ Sync ports in comma separated form to search. If no names are specified, all cDAQ Sync ports on connected, non-simulated devices are scanned. The time in seconds to wait for the device to respond before timing out. If a timeout occurs, no configuration is changed. Indicates if any port connections are unverified. The NI-DAQmx driver returned an error. The port-to-port connections that failed verification. Failures generally indicate a wiring issue or that a device has been powered off or removed. Stop all NI-DAQmx tasks running on the devices prior to running this method because any running tasks cause the verification process to fail.

Adds a cDAQ Sync connection between devices. The connection is not verified.

Specifies the cDAQ Sync ports to connect. The NI-DAQmx driver returned an error.

Removes a cDAQ Sync connection between devices. The connection is not verified.

Specifies the cDAQ Sync ports to disconnect. The NI-DAQmx driver returned an error.

Sets the states that analog physical channels on a device are set to when the device powers up or when the device is reset.

Power-up states are stored in EEPROMs that you can write to only a limited number of times. Therefore, you should use this method as infrequently as possible. This method writes to the EEPROM only if a setting you request is different from the one currently stored on the EEPROM. This method writes power-up states in sequential order. Therefore, if a physical channel has multiple entries, the last entry is used. The physical channels that were modified. The 1D array listing the power-up states for each corresponding physical channel. If the channel type for the physical channel is high-impedance, this value is 0. The value set for the physical channel when the device powers up or when the device is reset. You specify this value with .

Gets the states that analog physical channels on a device are set to when the device powers up or when the device is reset.

Power-up states are stored in EEPROMs that you can write to only a limited number of times. Therefore, you should use this method as infrequently as possible. This method writes to the EEPROM only if a setting you request is different from the one currently stored on the EEPROM. This method writes power-up states in sequential order. Therefore, if a physical channel has multiple entries, the last entry is used. The physical channels that were modified. The 1D array listing the power-up states for each corresponding physical channel. If the channel type for the physical channel is high-impedance, this value is 0. The value set for the physical channel when the device powers up or when the device is reset. You specify this value with .

Indicates an array that contains the names of all global channels saved on the system.

Indicates an array that contains the names of all global channels saved on the system. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates an array that contains the names of all custom scales saved on the system.

Indicates an array that contains the names of all custom scales saved on the system. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates an array that contains the names of all tasks saved on the system.

Indicates an array that contains the names of all tasks saved on the system. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the names of all devices installed in the system.

Indicates the names of all devices installed in the system. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the major portion of the installed version of NI-DAQmx, such as 7 for version 7.0.

Indicates the major portion of the installed version of NI-DAQmx, such as 7 for version 7.0. The NI-DAQmx driver returned an error.

Indicates the minor portion of the installed version of NI-DAQmx, such as 0 for version 7.0.

Indicates the minor portion of the installed version of NI-DAQmx, such as 0 for version 7.0. The NI-DAQmx driver returned an error.

Indicates the update portion of the installed version of NI-DAQmx, such as 1 for version 9.0.1.

Indicates the update portion of the installed version of NI-DAQmx, such as 1 for version 9.0.1. The NI-DAQmx driver returned an error.

Encapsulates a custom scale that scales values by using an nth-order polynomial equation.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class with the specified forward and reverse coefficients.

The name of the custom scale for later use, such as when you create a virtual channel. The array of the forward coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. The array of the reverse coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y3. The NI-DAQmx driver returned an error.

Creates a new instance of the class with the specified forward or reverse coefficients and automatically computes the other set of coefficients with the same order as the provided coefficients, using 1000 points in the specified range.

The name of the custom scale for later use, such as when you create a virtual channel. The conversion direction of the specified polynomial. The opposite polynomial is computed by the . The array of coefficients of a polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. This polynomial is used as either the forward or reverse polynomial depending on the direction specified. The minimum of the range over which the polynomial specified is valid or of interest. The maximum of the range over which the polynomial specified is valid or of interest. The NI-DAQmx driver returned an error.

Creates a new instance of the class with the specified forward or reverse coefficients and automatically computes the other set of coefficients.

The name of the custom scale for later use, such as when you create a virtual channel. The conversion direction of the specified polynomial. The opposite polynomial is computed by the . The array of coefficients of a polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. This polynomial is used as either the forward or reverse polynomial depending on the direction specified. The minimum of the range over which the polynomial specified is valid or of interest. The maximum of the range over which the polynomial specified is valid or of interest. The number of points to evaluate for computing the polynomial of the opposite direction. The order of polynomial to compute for the opposite polynomial to the one provided. Specify -1 to use the same order as the forward polynomial. The NI-DAQmx driver returned an error.

Specifies an array of coefficients for the polynomial that converts pre-scaled values to scaled values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3.

Specifies an array of coefficients for the polynomial that converts pre-scaled values to scaled values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array of coefficients for the polynomial that converts scaled values to pre-scaled values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y^3.

Specifies an array of coefficients for the polynomial that converts scaled values to pre-scaled values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y^3. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Encapsulates a custom scale that scales values proportionally from a range of prescaled values to a range of scaled values.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class with the prescaled minimum and maximum values and the scaled minimum and maximum values.

The name of the custom scale for later use, such as when you create a virtual channel. The smallest value in the range of prescaled values. The largest value in the range of prescaled values. The smallest value in the range of scaled values. The largest value in the range of scaled values. The NI-DAQmx driver returned an error.

Specifies the largest value in the range of scaled values. NI-DAQmx maps this value to . Reads coerce samples that are larger than this value to match this value. Writes generate errors for samples that are larger than this value.

Specifies the largest value in the range of scaled values. NI-DAQmx maps this value to . Reads coerce samples that are larger than this value to match this value. Writes generate errors for samples that are larger than this value. The NI-DAQmx driver returned an error.

Specifies the largest value in the range of pre-scaled values. NI-DAQmx maps this value to .

Specifies the largest value in the range of pre-scaled values. NI-DAQmx maps this value to . The NI-DAQmx driver returned an error.

Specifies the smallest value in the range of scaled values. NI-DAQmx maps this value to . Reads coerce samples that are smaller than this value to match this value. Writes generate errors for samples that are smaller than this value.

Specifies the smallest value in the range of scaled values. NI-DAQmx maps this value to . Reads coerce samples that are smaller than this value to match this value. Writes generate errors for samples that are smaller than this value. The NI-DAQmx driver returned an error.

Specifies the smallest value in the range of pre-scaled values. NI-DAQmx maps this value to .

Specifies the smallest value in the range of pre-scaled values. NI-DAQmx maps this value to . The NI-DAQmx driver returned an error.

Encapsulates a custom scale that maps an array of prescaled values to an array of corresponding scaled values, with all other values scaled proportionally.

The following example explains how to update the property that returns an array: Dim preScaledValues As Double() = New Double() {0.11, 0.12, 0.13} Dim scaledValues As Double() = New Double() {1.1, 1.2, 1.3} Dim tablescale As New TableScale("DAQmxTableScale", preScaledValues, scaledValues) ' To update the value at specific index in tablescale.PreScaledValues ' change the source array and assign it back to the property. preScaledValues(0) = 0.1 tablescale.PreScaledValues = preScaledValues double[] preScaledValues = new double[] { .11, .12, .13 }; double[] scaledValues = new double[] { 1.1, 1.2, 1.3 }; TableScale tablescale = new TableScale("DAQmxTableScale", preScaledValues, scaledValues); // To update the value at specific index in tablescale.PreScaledValues // change the source array and assign it back to the property. preScaledValues[0] = 0.1; tablescale.PreScaledValues = preScaledValues; The following example explains how to update the property that returns an array: Dim preScaledValues As Double() = New Double() {0.11, 0.12, 0.13} Dim scaledValues As Double() = New Double() {1.1, 1.2, 1.3} Dim tablescale As New TableScale("DAQmxTableScale", preScaledValues, scaledValues) ' To update the value at specific index in tablescale.ScaledValues ' change the source array and assign it back to the property. scaledValues(0) = 1.12 tablescale.ScaledValues = scaledValues double[] preScaledValues = new double[] { .11, .12, .13 }; double[] scaledValues = new double[] { 1.1, 1.2, 1.3 }; TableScale tablescale = new TableScale("DAQmxTableScale", preScaledValues, scaledValues); // To update the value at specific index in tablescale.ScaledValues // change the source array and assign it back to the property. scaledValues[0] = 1.12; tablescale.ScaledValues = scaledValues; Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class with the specified scaled and prescaled values.

The name of the custom scale for later use, such as when you create a virtual channel. An array of prescaled values that map to the scaled values in . An array of scaled values that map to the prescaled values in . The NI-DAQmx driver returned an error.

Specifies an array of scaled values. These values map directly to the values in .

Specifies an array of scaled values. These values map directly to the values in . The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array of pre-scaled values. These values map directly to the values in .

Specifies an array of pre-scaled values. These values map directly to the values in . The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Contains members that configure all of the triggers that can affect a .

Gets the .

The .

Gets the .

The .

Gets the .

The .

Gets the .

The .

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the .

The .

Gets the .

The .

Gets the .

The .

Specifies the role of the device in a synchronized system. Setting this value to or enables trigger skew correction. If you enable trigger skew correction, set this property to on only one device, and set this property to on the other devices.

Specifies the role of the device in a synchronized system. Setting this value to or enables trigger skew correction. If you enable trigger skew correction, set this property to on only one device, and set this property to on the other devices. The NI-DAQmx driver returned an error.

Encapsulates the signals that are available for routing off of the DAQ device, the properties that define which terminal the signals are routed to, and the programmable characteristics of the signals for a .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Routes a control signal to the specified terminal.

The trigger, clock, or event to export. The destination of the exported signal. You can also specify a comma-delimited list for multiple terminal names. Because the output terminal can reside on the device that generates the control signal or on a different device, you can use this method to share clocks and triggers between multiple devices. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the AI Convert Clock.

Specifies the terminal to which to route the AI Convert Clock. The NI-DAQmx driver returned an error.

Indicates the polarity of the exported AI Convert Clock. The polarity is fixed and independent of the active edge of the source of the AI Convert Clock.

Indicates the polarity of the exported AI Convert Clock. The polarity is fixed and independent of the active edge of the source of the AI Convert Clock. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the 10MHz Clock.

Specifies the terminal to which to route the 10MHz Clock. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the 20MHz Timebase.

Specifies the terminal to which to route the 20MHz Timebase. The NI-DAQmx driver returned an error.

Specifies whether the exported Sample Clock issues a pulse at the beginning of a sample or changes to a high state for the duration of the sample.

Specifies whether the exported Sample Clock issues a pulse at the beginning of a sample or changes to a high state for the duration of the sample. The NI-DAQmx driver returned an error. E Series devices might require many AI Convert Clock pulses to acquire one sample. Each pulse of the Sample Clock initiates the acquisition of one sample per channel in the task. Each sample per channel requires a pulse from the AI Convert Clock. This property is valid for the AI Sample Clock only.

Specifies the terminal to which to route the Sample Clock.

Specifies the terminal to which to route the Sample Clock. The NI-DAQmx driver returned an error.

Specifies in seconds the amount of time to offset the exported Sample clock. Refer to timing diagrams for generation applications in the device documentation for more information about this value.

Specifies in seconds the amount of time to offset the exported Sample clock. Refer to timing diagrams for generation applications in the device documentation for more information about this value. The NI-DAQmx driver returned an error.

Specifies the polarity of the exported Sample Clock if is .

Specifies the polarity of the exported Sample Clock if is . The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Sample Clock Timebase.

Specifies the terminal to which to route the Sample Clock Timebase. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Divided Sample Clock Timebase.

Specifies the terminal to which to route the Divided Sample Clock Timebase. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Advance Trigger.

Specifies the terminal to which to route the Advance Trigger. The NI-DAQmx driver returned an error.

Indicates the polarity of the exported Advance Trigger.

Indicates the polarity of the exported Advance Trigger. The NI-DAQmx driver returned an error.

Specifies the units of .

Specifies the units of . The NI-DAQmx driver returned an error.

Specifies the width of an exported Advance Trigger pulse. Specify this value in the units you specify with .

Specifies the width of an exported Advance Trigger pulse. Specify this value in the units you specify with . The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Pause Trigger.

Specifies the terminal to which to route the Pause Trigger. The NI-DAQmx driver returned an error.

Specifies the active level of the exported Pause Trigger.

Specifies the active level of the exported Pause Trigger. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Reference Trigger.

Specifies the terminal to which to route the Reference Trigger. The NI-DAQmx driver returned an error.

Specifies the polarity of the exported Reference Trigger.

Specifies the polarity of the exported Reference Trigger. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Start Trigger.

Specifies the terminal to which to route the Start Trigger. The NI-DAQmx driver returned an error.

Specifies the polarity of the exported Start Trigger.

Specifies the polarity of the exported Start Trigger. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Advance Complete Event.

Specifies the terminal to which to route the Advance Complete Event. The NI-DAQmx driver returned an error.

Specifies the output signal delay in periods of the sample clock.

Specifies the output signal delay in periods of the sample clock. The NI-DAQmx driver returned an error.

Specifies the polarity of the exported Advance Complete Event.

Specifies the polarity of the exported Advance Complete Event. The NI-DAQmx driver returned an error.

Specifies the width of the exported Advance Complete Event pulse.

Specifies the width of the exported Advance Complete Event pulse. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the AI Hold Complete Event.

Specifies the terminal to which to route the AI Hold Complete Event. The NI-DAQmx driver returned an error.

Specifies the polarity of an exported AI Hold Complete Event pulse.

Specifies the polarity of an exported AI Hold Complete Event pulse. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Change Detection Event.

Specifies the terminal to which to route the Change Detection Event. The NI-DAQmx driver returned an error.

Specifies the polarity of an exported Change Detection Event pulse.

Specifies the polarity of an exported Change Detection Event pulse. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Counter Output Event.

Specifies the terminal to which to route the Counter Output Event. The NI-DAQmx driver returned an error.

Specifies whether the exported Counter Output Event pulses or changes from one state to the other when the counter reaches terminal count.

Specifies whether the exported Counter Output Event pulses or changes from one state to the other when the counter reaches terminal count. The NI-DAQmx driver returned an error. Upon reaching terminal count, the counter can issue a pulse. Use to select a high or low pulse. Upon reaching terminal count, the output terminal of the counter can change state, or toggle. For example, if the terminal is initially at a low state, it changes to high state and stays at the high state until the next terminal count. The terminal then changes to low state. Use to select the initial state of the terminal. When counting up, a counter reaches terminal count when it reaches the maximum value (2^24 - 1 for a 24-bit counter). When counting down, a counter reaches terminal count when it reaches 0.

Specifies the polarity of the pulses at the output terminal of the counter when is . NI-DAQmx ignores this property if is .

Specifies the polarity of the pulses at the output terminal of the counter when is . NI-DAQmx ignores this property if is . The NI-DAQmx driver returned an error.

Specifies the initial state of the output terminal of the counter when is . The terminal enters this state when NI-DAQmx commits the task.

Specifies the initial state of the output terminal of the counter when is . The terminal enters this state when NI-DAQmx commits the task. The NI-DAQmx driver returned an error. The initial state of the terminal affects whether the first toggle is from low state to high state or from high state to low state. NI-DAQmx ignores this property if is .

Specifies the terminal to which to route the Handshake Event.

Specifies the terminal to which to route the Handshake Event. The NI-DAQmx driver returned an error.

Specifies the output behavior of the Handshake Event.

Specifies the output behavior of the Handshake Event. The NI-DAQmx driver returned an error.

Specifies the number of seconds to delay after the Handshake Trigger deasserts before asserting the Handshake Event.

Specifies the number of seconds to delay after the Handshake Trigger deasserts before asserting the Handshake Event. The NI-DAQmx driver returned an error.

Specifies the asserted level of the exported Handshake Event if is .

Specifies the asserted level of the exported Handshake Event if is . The NI-DAQmx driver returned an error.

Specifies to assert the Handshake Event when the task starts if is .

Specifies to assert the Handshake Event when the task starts if is . The NI-DAQmx driver returned an error.

Specifies in seconds the amount of time to wait after the Handshake Trigger asserts before deasserting the Handshake Event if is .

Specifies in seconds the amount of time to wait after the Handshake Trigger asserts before deasserting the Handshake Event if is . The NI-DAQmx driver returned an error.

Specifies the polarity of the exported Handshake Event if is .

Specifies the polarity of the exported Handshake Event if is . The NI-DAQmx driver returned an error.

Specifies in seconds the pulse width of the exported Handshake Event if is .

Specifies in seconds the pulse width of the exported Handshake Event if is . The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Ready for Transfer Event.

Specifies the terminal to which to route the Ready for Transfer Event. The NI-DAQmx driver returned an error.

Specifies the active level of the exported Ready for Transfer Event.

Specifies the active level of the exported Ready for Transfer Event. The NI-DAQmx driver returned an error.

Specifies when the ready for transfer event deasserts.

Specifies when the ready for transfer event deasserts. The NI-DAQmx driver returned an error.

Specifies in samples the threshold below which the Ready for Transfer Event deasserts. This threshold is an amount of space available in the onboard memory of the device. must be to use a custom threshold.

Specifies in samples the threshold below which the Ready for Transfer Event deasserts. This threshold is an amount of space available in the onboard memory of the device. must be to use a custom threshold. The NI-DAQmx driver returned an error.

Specifies the terminal to which to export the Data Active Event.

Specifies the terminal to which to export the Data Active Event. The NI-DAQmx driver returned an error.

Specifies the polarity of the exported Data Active Event.

Specifies the polarity of the exported Data Active Event. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Ready for Start Event.

Specifies the terminal to which to route the Ready for Start Event. The NI-DAQmx driver returned an error.

Specifies the polarity of the exported Ready for Start Event.

Specifies the polarity of the exported Ready for Start Event. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Synchronization Pulse Event.

Specifies the terminal to which to route the Synchronization Pulse Event. The NI-DAQmx driver returned an error.

Specifies the terminal to which to route the Watchdog Timer Expired Event.

Specifies the terminal to which to route the Watchdog Timer Expired Event. The NI-DAQmx driver returned an error.

Contains properties to configure digital edgeadvance triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

(Deprecated) Specifies the name of a terminal where there is a digital signal to use as the source of the Advance Trigger.

(Deprecated) Specifies the name of a terminal where there is a digital signal to use as the source of the Advance Trigger. The NI-DAQmx driver returned an error.

(Deprecated) Specifies on which edge of a digital signal to advance to the next entry in a scan list.

(Deprecated) Specifies on which edge of a digital signal to advance to the next entry in a scan list. The NI-DAQmx driver returned an error.

(Deprecated) Specifies whether to apply the pulse width filter to the signal.

(Deprecated) Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Contains properties to configure analog windowpause triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger.

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger. The NI-DAQmx driver returned an error. For E Series devices, if you use a channel name, the channel must be the only channel in the task. The only terminal you can use for E Series devices is PFI0.

Specifies whether the task pauses while the trigger signal is inside or outside the window you specify with and .

Specifies whether the task pauses while the trigger signal is inside or outside the window you specify with and . The NI-DAQmx driver returned an error.

Specifies the upper limit of the window. Specify this value in the units of the measurement or generation.

Specifies the upper limit of the window. Specify this value in the units of the measurement or generation. The NI-DAQmx driver returned an error.

Specifies the lower limit of the window. Specify this value in the units of the measurement or generation.

Specifies the lower limit of the window. Specify this value in the units of the measurement or generation. The NI-DAQmx driver returned an error.

Specifies the coupling for the source signal of the terminal if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the terminal if the source is a terminal rather than a virtual channel. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay within the trigger window for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the window rapidly.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay within the trigger window for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the window rapidly. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Contains properties to configure analog levelpause triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger.

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger. The NI-DAQmx driver returned an error. For E Series devices, if you use a channel name, the channel must be the only channel in the task. The only terminal you can use for E Series devices is PFI0.

Specifies whether the task pauses above or below the threshold you specify with .

Specifies whether the task pauses above or below the threshold you specify with . The NI-DAQmx driver returned an error.

Specifies the threshold at which to pause the task. Specify this value in the units of the measurement or generation. Use to specify whether the task pauses above or below this threshold.

Specifies the threshold at which to pause the task. Specify this value in the units of the measurement or generation. Use to specify whether the task pauses above or below this threshold. The NI-DAQmx driver returned an error.

Specifies a hysteresis level in the units of the measurement or generation. If is , the trigger does not deassert until the source signal passes below minus the hysteresis. If is , the trigger does not deassert until the source signal passes above plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis.

Specifies a hysteresis level in the units of the measurement or generation. If is , the trigger does not deassert until the source signal passes below minus the hysteresis. If is , the trigger does not deassert until the source signal passes above plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis. The NI-DAQmx driver returned an error.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay above or below the trigger level for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the hysteresis window rapidly.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay above or below the trigger level for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the hysteresis window rapidly. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Contains properties to configure digital levelpause triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a terminal where there is a digital signal to use as the source of the Pause Trigger.

Specifies the name of a terminal where there is a digital signal to use as the source of the Pause Trigger. The NI-DAQmx driver returned an error.

Specifies whether the task pauses while the signal is high or low.

Specifies whether the task pauses while the signal is high or low. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the trigger signal.

Specifies whether to apply a digital filter to the trigger signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Contains properties to configure digital edgereference triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a terminal where there is a digital signal to use as the source of the Reference Trigger.

Specifies the name of a terminal where there is a digital signal to use as the source of the Reference Trigger. The NI-DAQmx driver returned an error.

Specifies on what edge of a digital pulse the Reference Trigger occurs.

Specifies on what edge of a digital pulse the Reference Trigger occurs. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the trigger signal.

Specifies whether to apply a digital filter to the trigger signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Contains properties to configure analog edgereference triggers.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the Reference Trigger.

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the Reference Trigger. The NI-DAQmx driver returned an error. For E Series devices, if you use a channel name, the channel must be the only channel in the task. The only terminal you can use for E Series devices is PFI0.

Specifies on which slope of the source signal the Reference Trigger occurs.

Specifies on which slope of the source signal the Reference Trigger occurs. The NI-DAQmx driver returned an error.

Specifies in the units of the measurement the threshold at which the Reference Trigger occurs. Use to specify on which slope to trigger at this threshold.

Specifies in the units of the measurement the threshold at which the Reference Trigger occurs. Use to specify on which slope to trigger at this threshold. The NI-DAQmx driver returned an error.

Specifies a hysteresis level in the units of the measurement. If is , the trigger does not deassert until the source signal passes below minus the hysteresis. If is , the trigger does not deassert until the source signal passes above plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis.

Specifies a hysteresis level in the units of the measurement. If is , the trigger does not deassert until the source signal passes below minus the hysteresis. If is , the trigger does not deassert until the source signal passes above plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis. The NI-DAQmx driver returned an error.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay above or below the trigger level for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the hysteresis window rapidly.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay above or below the trigger level for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the hysteresis window rapidly. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width thefilter recognizes.

Specifies in seconds the minimum pulse width thefilter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Contains properties to configure analog windowreference triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the Reference Trigger.

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the Reference Trigger. The NI-DAQmx driver returned an error. For E Series devices, if you use a channel name, the channel must be the only channel in the task. The only terminal you can use for E Series devices is PFI0.

Specifies whether the Reference Trigger occurs when the source signal enters the window or when it leaves the window. Use and to specify the window.

Specifies whether the Reference Trigger occurs when the source signal enters the window or when it leaves the window. Use and to specify the window. The NI-DAQmx driver returned an error.

Specifies the upper limit of the window. Specify this value in the units of the measurement.

Specifies the upper limit of the window. Specify this value in the units of the measurement. The NI-DAQmx driver returned an error.

Specifies the lower limit of the window. Specify this value in the units of the measurement.

Specifies the lower limit of the window. Specify this value in the units of the measurement. The NI-DAQmx driver returned an error.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay within the trigger window for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the window rapidly.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay within the trigger window for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the window rapidly. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Contains properties to configure digital edgestart triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a terminal where there is a digital signal to use as the source of the Start Trigger.

Specifies the name of a terminal where there is a digital signal to use as the source of the Start Trigger. The NI-DAQmx driver returned an error.

Specifies on which edge of a digital pulse to start acquiring or generating samples.

Specifies on which edge of a digital pulse to start acquiring or generating samples. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the trigger signal.

Specifies whether to apply a digital filter to the trigger signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. If you set this property to , the device does not recognize and act upon the trigger until the next pulse of the internal timebase.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. If you set this property to , the device does not recognize and act upon the trigger until the next pulse of the internal timebase. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Contains properties to configure analog edgestart triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the Start Trigger.

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the Start Trigger. The NI-DAQmx driver returned an error. For E Series devices, if you use a channel name, the channel must be the first one in the task. The only terminal you can use for E Series devices is PFI0.

Specifies on which slope of the trigger signal to start acquiring or generating samples.

Specifies on which slope of the trigger signal to start acquiring or generating samples. The NI-DAQmx driver returned an error.

Specifies at what threshold in the units of the measurement or generation to start acquiring or generating samples. Use to specify on which slope to trigger on this threshold.

Specifies at what threshold in the units of the measurement or generation to start acquiring or generating samples. Use to specify on which slope to trigger on this threshold. The NI-DAQmx driver returned an error.

Specifies a hysteresis level in the units of the measurement or generation. If is , the trigger does not deassert until the source signal passes below minus the hysteresis. If is , the trigger does not deassert until the source signal passes above plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis.

Specifies a hysteresis level in the units of the measurement or generation. If is , the trigger does not deassert until the source signal passes below minus the hysteresis. If is , the trigger does not deassert until the source signal passes above plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis. The NI-DAQmx driver returned an error.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay above or below the trigger level for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the hysteresis window rapidly.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay above or below the trigger level for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the hysteresis window rapidly. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Contains properties to configure analog windowstart triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the Start Trigger.

Specifies the name of a virtual channel or terminal where there is an analog signal to use as the source of the Start Trigger. The NI-DAQmx driver returned an error. For E Series devices, if you use a channel name, the channel must be the first one in the task. The only terminal you can use for E Series devices is PFI0.

Specifies whether the task starts acquiring or generating samples when the signal enters or leaves the window you specify with and .

Specifies whether the task starts acquiring or generating samples when the signal enters or leaves the window you specify with and . The NI-DAQmx driver returned an error.

Specifies the upper limit of the window. Specify this value in the units of the measurement or generation.

Specifies the upper limit of the window. Specify this value in the units of the measurement or generation. The NI-DAQmx driver returned an error.

Specifies the lower limit of the window. Specify this value in the units of the measurement or generation.

Specifies the lower limit of the window. Specify this value in the units of the measurement or generation. The NI-DAQmx driver returned an error.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. The NI-DAQmx driver returned an error.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay within the trigger window for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the window rapidly.

Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay within the trigger window for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the window rapidly. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the terminal of the signal to use as the timebase of the digital filter.

Specifies the terminal of the signal to use as the timebase of the digital filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error.

Contains properties for a switch scan list.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Indicates if the switch hardware is waiting for an Advance Trigger. If the hardware is waiting, it completed the previous entry in the scan list.

Indicates if the switch hardware is waiting for an Advance Trigger. If the hardware is waiting, it completed the previous entry in the scan list.

Specifies if the task advances through the scan list multiple times.

Specifies if the task advances through the scan list multiple times.

Specifies the action to take between each entry in a scan list.

Specifies the action to take between each entry in a scan list.

Encapsulates a switch device and contains properties and methods that operate on switch devices outside the context of a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Resets a switch device and sets its topology.

The switch topology to use on the device. This method differs from because it uses the value of rather than the topology specified in Measurement Automation Explorer (MAX). However, this method maintains the channel usage defaults that you configure in MAX. The NI-DAQmx driver returned an error.

Waits for the settling time on the device to expire.

The settling time is reset and begins counting down upon a switch operation. Therefore, this method might return immediately if no operation happened recently. The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets an array of the names of all switch topologies supported by this switch device.

An array of that contains the names of all switch topologies supported by this switch device. The NI-DAQmx driver returned an error.

Indicates the current temperature as read by the Switch module in degrees Celsius. Refer to your device documentation for more information.

Indicates the current temperature as read by the Switch module in degrees Celsius. Refer to your device documentation for more information.

Indicates the current topology of the device. This value is one of the topology options in .

Indicates the current topology of the device. This value is one of the topology options in .

Gets the number of columns on a device in a matrix switch topology. This value is always 1 if the device is in a mux topology.

Indicates the number of columns on a device in a matrix switch topology. This value is always 1 if the device is in a mux topology.

Indicates the number of rows on a device in a matrix switch topology. Indicates the number of multiplexed channels on a device in a mux topology.

Indicates the number of rows on a device in a matrix switch topology. Indicates the number of multiplexed channels on a device in a mux topology.

Indicates the number of switch channels for the current topology of the device. This value matches the number of channel names in .

Indicates the number of switch channels for the current topology of the device. This value matches the number of channel names in .

Indicates a comma-delimited list of channel names for the current topology of the device.

Indicates a comma-delimited list of channel names for the current topology of the device.

Indicates the number of relays on the device. This value matches the number of relay names in .

Indicates the number of relays on the device. This value matches the number of relay names in .

Indicates a comma-delimited list of relay names.

Indicates a comma-delimited list of relay names.

Indicates when has expired.

Indicates when has expired.

Specifies if powers down latching relays after waiting for the device to settle.

Specifies if powers down latching relays after waiting for the device to settle.

Specifies if NI-DAQmx routes multiplexed channels to the analog bus backplane. Only the SCXI-1127 and SCXI-1128 support this property.

Specifies if NI-DAQmx routes multiplexed channels to the analog bus backplane.

Specifies in seconds the amount of time to wait for the switch to settle (or debounce). NI-DAQmx adds this time to the settling time of the motherboard. Modify this property only if the switch does not settle within the settling time of the motherboard. Refer to device documentation for supported settling times.

Specifies in seconds the amount of time to wait for the switch to settle (or debounce).

Encapsulates a channel on a switch device and contains properties and methods that operate on switch channels outside the context of a task. This class also defines the intended use of particular switch channels in tasks.

Use the method on the instance of to create an instance of this class for a switch channel on your system.Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Releases all resources used by .

The NI-DAQmx driver returned an error. Use this method only if the application you create runs on a low memory system.

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Indicates in ohms the switch impedance. This value is important in the RF domain and should match the impedance of the sources and loads.

Indicates in ohms the switch impedance. This value is important in the RF domain and should match the impedance of the sources and loads.

Indicates in Hertz the maximum frequency of a signal that can pass through the switch without significant deterioration.

Indicates in Hertz the maximum frequency of a signal that can pass through the switch without significant deterioration.

Indicates the number of wires that the channel switches.

Indicates the number of wires that the channel switches.

Indicates in volts the maximum DC voltage that the device can switch.

Indicates in volts the maximum DC voltage that the device can switch.

Indicates in volts the maximum AC RMS voltage that the device can switch.

Indicates in volts the maximum AC RMS voltage that the device can switch.

Indicates in watts the maximum DC power that the device can switch.

Indicates in watts the maximum DC power that the device can switch.

Indicates in watts the maximum DC power that the device can carry.

Indicates in watts the maximum DC power that the device can carry.

Indicates in amperes the maximum DC current that the device can switch. This current is always against a DC voltage level.

Indicates in amperes the maximum DC current that the device can switch. This current is always against a DC voltage level.

Indicates in amperes the maximum DC current that the device can carry.

Indicates in amperes the maximum DC current that the device can carry.

Indicates in watts the maximum AC power that the device can switch.

Indicates in watts the maximum AC power that the device can switch.

Indicates in watts the maximum AC power that the device can carry.

Indicates in watts the maximum AC power that the device can carry.

Indicates in amperes the maximum AC current that the device can switch. This current is always against an RMS voltage level.

Indicates in amperes the maximum AC current that the device can switch. This current is always against an RMS voltage level.

Indicates in amperes the maximum AC current that the device can carry.

Indicates in amperes the maximum AC current that the device can carry.

Specifies whether to enable sharing of an analog bus line so that multiple switch devices can connect to it simultaneously. For each device that will share the analog bus line, set this property to to enable sharing on the channel that connects to the analog bus line. Analog bus sharing is disabled by default.

Specifies whether to enable sharing of an analog bus line so that multiple switch devices can connect to it simultaneously.

Specifies how you can use the channel. Using this property acts as a safety mechanism to prevent you from connecting two source channels, for example.

Specifies how you can use the channel.

Represents the method that handles the event.

The source of the event. A object that contains the event data.

Specifies how to alter the state of the task.

Programs the hardware with all parameters of the task.

Transitions the task to the running state, which begins device input or output.

Releases all previously reserved resources.

Marks the hardware resources that are needed for the task as in use. No other tasks can reserve these same resources.

Verifies that all task parameters are valid for the hardware.

Transitions the task from the running state to the committed state, which ends device input or output.

Aborts execution of the task. Aborting a task immediately terminates the currently active operation, such as a read or a write. Aborting a task puts the task into an unstable but recoverable state. To recover the task, use to restart the task or use to reset the task without starting it.

Specifies how to group digital lines into one or more virtual channels.

All digital lines are combined into a single virtual channel.

A separate virtual channel is created for each digital line.

Specifies the status of the requested path.

One of the endpoint channels is reserved for routing.

No path is available between the two channels because connecting the channels would directly or indirectly connect two source channels.

The path between the two endpoints is unavailable because another connection is already using a channel needed for routing.

No path is available between the channels. You might need to reserve more channels for routing to create an available path.

The channels are already connected.

A path is available between the channels.

Specifies the position of each specified relay.

The relay is closed.

The relay is open.

Exposes a data stream on a that can be used to control reading and writing behavior and can be used in conjunction with reader and writer classes to read or write samples to or from an NI-DAQmx task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Overrides the automatic input buffer allocation that NI-DAQmx performs.

The number of samples the buffer can hold for each channel in the task. Zero indicates that no buffer is allocated. Set to 0 to perform a hardware-timed operation without using a buffer.The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Writes raw, unprocessed samples to the channels in the task.

If set to , this method automatically calls if you do not explicitly call it. A byte array of raw data to write to the task. The format of the raw samples depends on the device to which you are writing. Consult your device documentation for more information. You can use the class to create a byte array from other types. The NI-DAQmx driver returned an error.

Reads raw, unprocessed samples from the channels in the task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A byte array of raw data from the task. The format of the raw samples depends on the device from which you are reading. Consult your device documentation for more information. You can use the class to translate the returned byte array data into other types. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Sets a subset of channels in the task from which to read.

The channels to read from. The NI-DAQmx driver returned an error.

Gets or sets the amount of time in milliseconds to wait for reads or writes to complete.

The time in milliseconds. If you set this property to -1 (or ), read or write operations never time out. This property applies to synchronous and asynchronous reads and writes. A write is considered complete when all of the written samples have been transferred to the task buffer. Writes do not wait until the written samples have been generated by the device. The NI-DAQmx driver returned an error.

Overrides the automatic output buffer allocation that NI-DAQmx performs.

The number of samples the buffer can hold for each channel in the task. Zero indicates that no buffer is allocated. Set to 0 to perform a hardware-timed operation without using a buffer.The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the buffer for the task.

The for the task.

Gets or sets the type of information returned from a waveform read.

The waveform attribute mode. The default value is a bitwise combination of and . This property applies to synchronous and asynchronous waveform reads. The NI-DAQmx driver returned an error.

Specifies the point in the buffer at which to begin a read operation. If you also specify an offset with , the read operation begins at that offset relative to the point you select with this property. The default value is unless you configure a Reference Trigger for the task. If you configure a Reference Trigger, the default value is .

Specifies the point in the buffer at which to begin a read operation. If you also specify an offset with , the read operation begins at that offset relative to the point you select with this property. The default value is unless you configure a Reference Trigger for the task. If you configure a Reference Trigger, the default value is . The NI-DAQmx driver returned an error.

Specifies an offset in samples per channel at which to begin a read operation. This offset is relative to the location you specify with .

Specifies an offset in samples per channel at which to begin a read operation. This offset is relative to the location you specify with . The NI-DAQmx driver returned an error.

Specifies whether subsequent read operations read all samples currently available in the buffer or wait for the buffer to become full before reading. NI-DAQmx uses this setting for finite acquisitions and only when the number of samples to read is -1. For continuous acquisitions when the number of samples to read is -1, a read operation always reads all samples currently available in the buffer.

Specifies whether subsequent read operations read all samples currently available in the buffer or wait for the buffer to become full before reading. NI-DAQmx uses this setting for finite acquisitions and only when the number of samples to read is -1. For continuous acquisitions when the number of samples to read is -1, a read operation always reads all samples currently available in the buffer. The NI-DAQmx driver returned an error.

Specifies if reading from the task automatically starts the task if you did not start the task explicitly by using starting the task. The default value is . When reading from the task starts a finite acquisition task, it also stops the task after reading the last sample.

Specifies if reading from the task automatically starts the task if you did not start the task explicitly by using starting the task. The default value is . When reading from the task starts a finite acquisition task, it also stops the task after reading the last sample. The NI-DAQmx driver returned an error.

Specifies whether to overwrite samples in the buffer that you have not yet read.

Specifies whether to overwrite samples in the buffer that you have not yet read. The NI-DAQmx driver returned an error.

Specifies the path to the TDMS file to which you want to log data. If the file path is changed while the task is running, this takes effect on the next sample interval (if Logging.SampsPerFile has been set) or when DAQmx Start New File is called. New file paths can be specified by ending with "\" or "/". Files created after specifying a new file path retain the same name and numbering sequence.

Specifies the path to the TDMS file to which you want to log data. If the file path is changed while the task is running, this takes effect on the next sample interval (if Logging.SampsPerFile has been set) or when DAQmx Start New File is called. New file paths can be specified by ending with "\" or "/". Files created after specifying a new file path retain the same name and numbering sequence. The NI-DAQmx driver returned an error.

Specifies whether to enable logging and whether to allow reading data while logging. Log mode allows for the best performance. However, you cannot read data while logging if you specify this mode. If you want to read data while logging, specify Log and Read mode.

Specifies whether to enable logging and whether to allow reading data while logging. Log mode allows for the best performance. However, you cannot read data while logging if you specify this mode. If you want to read data while logging, specify Log and Read mode. The NI-DAQmx driver returned an error.

Specifies the name of the group to create within the TDMS file for data from this task. If you append data to an existing file and the specified group already exists, NI-DAQmx appends a number symbol and a number to the group name, incrementing that number until finding a group name that does not exist. For example, if you specify a group name of Voltage Task, and that group already exists, NI-DAQmx assigns the group name Voltage Task #1, then Voltage Task #2.

Specifies the name of the group to create within the TDMS file for data from this task. If you append data to an existing file and the specified group already exists, NI-DAQmx appends a number symbol and a number to the group name, incrementing that number until finding a group name that does not exist. For example, if you specify a group name of Voltage Task, and that group already exists, NI-DAQmx assigns the group name Voltage Task #1, then Voltage Task #2. The NI-DAQmx driver returned an error. For digital input tasks, NI-DAQmx creates a group for each virtual channel in the task. For each created group, NI-DAQmx appends a hyphen and the virtual channel name to the group name. If you query this property, NI-DAQmx returns the original value specified without any suffixes appended by NI-DAQmx for digital input tasks or for existing groups.

Specifies how to open the TDMS file.

Specifies how to open the TDMS file. The NI-DAQmx driver returned an error.

Specifies whether logging is paused while a task is executing. If is set to Log and Read mode, this value is taken into consideration on the next call to DAQmx Read, where data is written to disk. If is set to Log Only mode, this value is taken into consideration the next time that data is written to disk. A new TDMS group is written when logging is resumed from a paused state.

Specifies whether logging is paused while a task is executing. If is set to Log and Read mode, this value is taken into consideration on the next call to DAQmx Read, where data is written to disk. If is set to Log Only mode, this value is taken into consideration the next time that data is written to disk. A new TDMS group is written when logging is resumed from a paused state. The NI-DAQmx driver returned an error.

Specifies how many samples to write to each file. When the file reaches the number of samples specified, a new file is created with the naming convention of <filename>_####.tdms, where #### starts at 0001 and increments automatically with each new file. For example, if the file specified is C:\data.tdms, the next file name used is C:\data_0001.tdms. To disable file spanning behavior, set this attribute to 0. If is changed while this attribute is set, the new file path takes effect on the next file created.

Specifies how many samples to write to each file. When the file reaches the number of samples specified, a new file is created with the naming convention of <filename>_####.tdms, where #### starts at 0001 and increments automatically with each new file. For example, if the file specified is C:\data.tdms, the next file name used is C:\data_0001.tdms. To disable file spanning behavior, set this attribute to 0. If is changed while this attribute is set, the new file path takes effect on the next file created. The NI-DAQmx driver returned an error.

Specifies the size, in samples, in which data will be written to disk. The size must be evenly divisible by the volume sector size, in bytes.

Specifies the size, in samples, in which data will be written to disk. The size must be evenly divisible by the volume sector size, in bytes. The NI-DAQmx driver returned an error.

Specifies a size in samples to be used to pre-allocate space on disk. Pre-allocation can improve file I/O performance, especially in situations where multiple files are being written to disk. For finite tasks, the default behavior is to pre-allocate the file based on the number of samples you configure the task to acquire.

Specifies a size in samples to be used to pre-allocate space on disk. Pre-allocation can improve file I/O performance, especially in situations where multiple files are being written to disk. For finite tasks, the default behavior is to pre-allocate the file based on the number of samples you configure the task to acquire. The NI-DAQmx driver returned an error.

Indicates in samples per channel the current position in the buffer.

Indicates in samples per channel the current position in the buffer. The NI-DAQmx driver returned an error.

Indicates the number of samples available to read per channel. This value is the same for all channels in the task.

Indicates the number of samples available to read per channel. This value is the same for all channels in the task. The NI-DAQmx driver returned an error.

Indicates the total number of samples acquired by each channel. NI-DAQmx returns a single value because this value is the same for all channels. For retriggered acquisitions, this value is the cumulative number of samples across all retriggered acquisitions.

Indicates the total number of samples acquired by each channel. NI-DAQmx returns a single value because this value is the same for all channels. For retriggered acquisitions, this value is the cumulative number of samples across all retriggered acquisitions. The NI-DAQmx driver returned an error.

Indicates if the device(s) detected a common mode range violation for any virtual channel in the task. Common mode range violation occurs when the voltage of either the positive terminal or negative terminal to ground are out of range. Reading this property clears the common mode range violation status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected a common mode range violation for any virtual channel in the task. Common mode range violation occurs when the voltage of either the positive terminal or negative terminal to ground are out of range. Reading this property clears the common mode range violation status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected a common mode range violation. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected a common mode range violation. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an excitation fault condition for any virtual channel in the task. Reading this property clears the excitation fault status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an excitation fault condition for any virtual channel in the task. Reading this property clears the excitation fault status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an excitation fault condition. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an excitation fault condition. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an overcurrent condition for any virtual channel in the task. Reading this property clears the overcurrent status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an overcurrent condition for any virtual channel in the task. Reading this property clears the overcurrent status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an overcurrent condition. You must read before you read this property. Otherwise, you will receive an error. On some devices, you must restart the task for all overcurrent channels to recover.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an overcurrent condition. You must read before you read this property. Otherwise, you will receive an error. On some devices, you must restart the task for all overcurrent channels to recover. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an overtemperature condition in any virtual channel in the task. Reading this property clears the overtemperature status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an overtemperature condition in any virtual channel in the task. Reading this property clears the overtemperature status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any overtemperature virtual channels. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any overtemperature virtual channels. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an open current loop for any virtual channel in the task. Reading this property clears the open current loop status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an open current loop for any virtual channel in the task. Reading this property clears the open current loop status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an open current loop. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an open current loop. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an open thermocouple connected to any virtual channel in the task. Reading this property clears the open thermocouple status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an open thermocouple connected to any virtual channel in the task. Reading this property clears the open thermocouple status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an open thermcouple. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an open thermcouple. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an overload in any virtual channel in the task. Reading this property clears the overload status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an overload in any virtual channel in the task. Reading this property clears the overload status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any overloaded virtual channels in the task. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any overloaded virtual channels in the task. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates whether the PLL is currently locked, or whether it became unlocked during the previous acquisition. Devices may report PLL Unlock either during acquisition or after acquisition.

Indicates whether the PLL is currently locked, or whether it became unlocked during the previous acquisition. Devices may report PLL Unlock either during acquisition or after acquisition. The NI-DAQmx driver returned an error.

Indicates the channels that had their PLLs unlock.

Indicates the channels that had their PLLs unlock. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates whether the target is currently locked to the grand master. Devices may report PLL Unlock either during acquisition or after acquisition.

Indicates whether the target is currently locked to the grand master. Devices may report PLL Unlock either during acquisition or after acquisition. The NI-DAQmx driver returned an error.

Indicates the channels from devices in an unlocked target.

Indicates the channels from devices in an unlocked target. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if any device(s) in the task detected the insertion or removal of an accessory since the task started. Reading this property clears the accessory change status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if any device(s) in the task detected the insertion or removal of an accessory since the task started. Reading this property clears the accessory change status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates the names of any devices that detected the insertion or removal of an accessory since the task started. You must read before you read this property. Otherwise, you will receive an error.

Indicates the names of any devices that detected the insertion or removal of an accessory since the task started. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates in bytes the size of a raw sample from the task.

Indicates in bytes the size of a raw sample from the task. The NI-DAQmx driver returned an error.

Indicates the number of channels that reading from the task reads from the task. This value is the number of channels in the task or the number of channels you specify with .

Indicates the number of channels that reading from the task reads from the task. This value is the number of channels in the task or the number of channels you specify with . The NI-DAQmx driver returned an error.

Indicates the number of lines per channel that NI-DAQmx returns in a sample for line-based reads. If a channel has fewer lines than this number, the extra lines are .

Indicates the number of lines per channel that NI-DAQmx returns in a sample for line-based reads. If a channel has fewer lines than this number, the extra lines are . The NI-DAQmx driver returned an error.

Specifies how reading from the task waits for samples to become available.

Specifies how reading from the task waits for samples to become available. The NI-DAQmx driver returned an error.

Specifies in seconds the amount of time to sleep after checking for available samples if is .

Specifies in seconds the amount of time to sleep after checking for available samples if is . The NI-DAQmx driver returned an error.

Specifies the point in the buffer at which to write data. If you also specify an offset with , the write operation begins at that offset relative to this point you select with this property.

Specifies the point in the buffer at which to write data. If you also specify an offset with , the write operation begins at that offset relative to this point you select with this property. The NI-DAQmx driver returned an error.

Specifies in samples per channel an offset at which a write operation begins. This offset is relative to the location you specify with .

Specifies in samples per channel an offset at which a write operation begins. This offset is relative to the location you specify with . The NI-DAQmx driver returned an error.

Specifies whether to allow NI-DAQmx to generate the same data multiple times.

Specifies whether to allow NI-DAQmx to generate the same data multiple times. The NI-DAQmx driver returned an error. If you enable regeneration and write new data to the buffer, NI-DAQmx can generate a combination of old and new data, a phenomenon called glitching.

Indicates the position in the buffer of the next sample to generate. This value is identical for all channels in the task.

Indicates the position in the buffer of the next sample to generate. This value is identical for all channels in the task. The NI-DAQmx driver returned an error.

Indicates if the device(s) detected an overcurrent condition for any channel in the task. Reading this property clears the overcurrent status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an overcurrent condition for any channel in the task. Reading this property clears the overcurrent status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any virtual channels in the task for which an overcurrent condition has been detected. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any virtual channels in the task for which an overcurrent condition has been detected. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an overtemperature condition in any virtual channel in the task. Reading this property clears the overtemperature status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an overtemperature condition in any virtual channel in the task. Reading this property clears the overtemperature status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any overtemperature virtual channels. You must read before you read this property. Otherwise, you will receive an error. The list of names may be empty if the device cannot determine the source of the overtemperature.

Indicates a list of names of any overtemperature virtual channels. You must read before you read this property. Otherwise, you will receive an error. The list of names may be empty if the device cannot determine the source of the overtemperature. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an External Overvoltage condition for any channel in the task. Reading this property clears the External Overvoltage status for all channels in the task. You must read this property before you read External OvervoltageChans. Otherwise, you will receive an error.

Indicates if the device(s) detected an External Overvoltage condition for any channel in the task. Reading this property clears the External Overvoltage status for all channels in the task. You must read this property before you read External OvervoltageChans. Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any virtual channels in the task for which an External Overvoltage condition has been detected. You must read External OvervoltageChansExist before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any virtual channels in the task for which an External Overvoltage condition has been detected. You must read External OvervoltageChansExist before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an overload in any virtual channel in the task. Reading this property clears the overload status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an overload in any virtual channel in the task. Reading this property clears the overload status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any overloaded virtual channels in the task. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any overloaded virtual channels in the task. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected an open current loop for any channel in the task. Reading this property clears the open current loop status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected an open current loop for any channel in the task. Reading this property clears the open current loop status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an open current loop. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any virtual channels in the task for which the device(s) detected an open current loop. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the device(s) detected a power supply fault for any channel in the task. Reading this property clears the power supply fault status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error.

Indicates if the device(s) detected a power supply fault for any channel in the task. Reading this property clears the power supply fault status for all channels in the task. You must read this property before you read . Otherwise, you will receive an error. The NI-DAQmx driver returned an error.

Indicates a list of names of any virtual channels in the task that have a power supply fault. You must read before you read this property. Otherwise, you will receive an error.

Indicates a list of names of any virtual channels in the task that have a power supply fault. You must read before you read this property. Otherwise, you will receive an error. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates whether the target is currently locked to the grand master. Devices may report PLL Unlock either during acquisition or after acquisition.

Indicates whether the target is currently locked to the grand master. Devices may report PLL Unlock either during acquisition or after acquisition. The NI-DAQmx driver returned an error.

Indicates the channels from devices in an unlocked target.

Indicates the channels from devices in an unlocked target. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates in samples per channel the amount of available space in the buffer.

Indicates in samples per channel the amount of available space in the buffer. The NI-DAQmx driver returned an error.

Indicates the total number of samples generated by each channel in the task. This value is identical for all channels in the task.

Indicates the total number of samples generated by each channel in the task. This value is identical for all channels in the task. The NI-DAQmx driver returned an error.

Indicates in bytes the required size of a raw sample to write to the task.

Indicates in bytes the required size of a raw sample to write to the task. The NI-DAQmx driver returned an error.

Indicates the number of channels that writing to the task writes to the task. This value is the number of channels in the task.

Indicates the number of channels that writing to the task writes to the task. This value is the number of channels in the task. The NI-DAQmx driver returned an error.

Specifies how writing to the task waits for space to become available in the buffer.

Specifies how writing to the task waits for space to become available in the buffer. The NI-DAQmx driver returned an error.

Specifies in seconds the amount of time to sleep after checking for available buffer space if is .

Specifies in seconds the amount of time to sleep after checking for available buffer space if is . The NI-DAQmx driver returned an error.

Indicates the number of Boolean values expected per channel in a sample for line-based writes. This property is determined by the channel in the task with the most digital lines. If a channel has fewer lines than this number, NI-DAQmx ignores the extra Boolean values.

Indicates the number of Boolean values expected per channel in a sample for line-based writes. This property is determined by the channel in the task with the most digital lines. If a channel has fewer lines than this number, NI-DAQmx ignores the extra Boolean values. The NI-DAQmx driver returned an error.

Contains methods for writing samples to one or more analog output channels in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to write to the specified .

The to write to. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for writers to provide samples to be generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Writes a single floating-point sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more floating-point samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of a single floating-point sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more floating-point samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to the Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous write initiated with or .

An that represents an asynchronous call started by calling or . If you call before the asynchronous write represented by the provided is complete, waits for the write to complete before returning. For a write to a buffered task, the write is considered complete when all of the written samples have been transferred to the task buffer. Use or on the object to determine if a task has generated all of the data it was configured to generate. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to or . The NI-DAQmx driver returned an error during the asynchronous operation. The data provided to or has a non-zero lower bound. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries and Asynchronous Reads and Writes. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries Asynchronous Reads and Writes

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Writes one or more analog waveform samples to one or more objects in a task.

If you set autoStart to , WriteWaveform automatically calls if you do not explicitly call . You cannot set this parameter to if you have installed events on the task. A 1D array of objects to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the analog waveform corresponds to the order in which you add the lines to the channel. The type of the analog waveform samples. If the task uses on-demand timing, the WriteWaveform method returns only after the device generates all samples. If the task uses any timing type other than on-demand, WriteWaveform returns immediately and does not wait for the device to generate all samples. Your application must call the method to wait until the device has generated all samples. Analog waveform writes are not affected by the or properties on . To configure timing for analog waveform writes, use the method. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of one or more analog waveform samples to one or more objects in a task.

If you set autoStart to , BeginWriteWaveform automatically calls if you do not explicitly call . You cannot set this parameter to if you have installed events on the task. A 1D array of objects to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the analog waveform corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. The type of the analog waveform samples. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Analog waveform writes are not affected by the or properties on . To configure timing for analog waveform writes, use the method. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes in the NI Measurement Studio Help and Generics in the .NET Framework in the .NET Framework Developer's Guide for additional information. Asynchronous Reads and Writes Generics in the .NET Framework

This overload is obsolete.

The return value is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete.

This overload is obsolete.

The return value is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete.

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Contains methods for writing samples to the analog output channel in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to write to the specified .

The to write to. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for writers to provide samples to be generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Writes a floating-point sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error.

Writes one or more floating-point samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of a floating-point sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more floating-point samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous write initiated with or .

An that represents an asynchronous call started by calling or . If you call before the asynchronous write represented by the provided is complete, waits for the write to complete before returning. For a write to a buffered task, the write is considered complete when all of the written samples have been transferred to the task buffer. Use or on the object to determine if a task has generated all of the data it was configured to generate. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to or . The NI-DAQmx driver returned an error during the asynchronous operation. The data provided to has a non-zero lower bound. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Writes one or more analog waveform samples to a single in a task.

If you set autoStart to , the WriteWaveform method automatically calls if you do not explicitly call . You cannot set this parameter to if you have installed events on the task. An to write to the task. The order of the lines in the analog waveform corresponds to the order in which you add the lines to the channel. The type of the analog waveform samples. If the task uses on-demand timing, the WriteWaveform method returns only after the device generates all samples. If the task uses any timing type other than on-demand, WriteWaveform returns immediately and does not wait for the device to generate all samples. Your application must call the method to wait until the device has generated all samples. Digital waveform writes are not affected by the or properties on . To configure timing for analog waveform writes, use the method. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more analog waveform samples to a single in a task.

If you set autoStart to , the BeginWriteWaveform method automatically calls if you do not explicitly call . You cannot set this parameter to if you have installed events on the task. An to write to the task. The order of the lines in the analog waveform corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. The type of the analog waveform samples. If the task uses on-demand timing, the BeginWriteWaveform method returns only after the device generates all samples. If the task uses any timing type other than on-demand, BeginWriteWaveform returns immediately and does not wait for the device to generate all samples. Your application must call the method to wait until the device has generated all samples. Digital waveform writes are not affected by the or properties on . To configure timing for analog waveform writes, use the method. The NI-DAQmx driver returned an error. has a non-zero lower bound. Refer to Asynchronous Reads and Writes in the NI Measurement Studio Help and Generics in the .NET Framework in the .NET Framework Developer's Guide for additional information. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Asynchronous Reads and Writes Generics in the .NET Framework

This overload is obsolete.

This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete.

This overload is obsolete.

The return value is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete.

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Contains methods for reading samples from one or more analog input channels in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to read from the specified .

The to read. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for readers to access the samples generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single floating-point sample from one or more objects in a task.

A 1D array of floating-point samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more floating-point samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of floating-point samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single floating-point sample from one or more objects in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of floating-point samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more floating-point samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of floating-point samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

This member is obsolete. Use the method to achieve the same functionality.

The return value is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more analog waveform samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of objects containing samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

This member is obsolete. Use the method to achieve the same functionality.

The return value is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete.

This member is obsolete. Use the method to achieve the same functionality.

The return value is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more analog waveform samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of objects containing samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Reads one or more analog waveform samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of that contains the read data. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing objects and their corresponding memory to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more analog waveform samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of that contains the read data. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing objects and their corresponding memory to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Reads one or more floating-point samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of floating-point samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more floating-point samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of floating-point samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more analog waveform samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of that contains the read data. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing objects and their corresponding memory to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more floating-point samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specifyif you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specifyif you do not need to pass any additional information to the callback. An initialized 2D array of floating-point samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more floating-point samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of floating-point samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A 2D array of floating-point samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more analog waveform samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of that contains the read data. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing objects and their corresponding memory to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling A 1D array of objects containing samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If the first dimension of does not match the number of channels. If is not , and is not capable of holding the required number of samples. For asynchronous reads, if is or is not an instance of returned from a call to . For reads that take a duration, if the duration provided was less than . If is or is uninitialized. If one of the elements of is . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Reads one or more analog waveform samples from one or more objects in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . A 1D array of objects containing samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If the provided was less than . The NI-DAQmx driver returned an error. NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Performs a memory-optimized read of one or more analog waveform samples from one or more objects in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An initialized 1D array of that contains the read data. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. A reference to the parameter containing samples from the task. If the first dimension of does not match the number of channels. If the duration provided was less than . If is not , and is not capable of holding the required number of samples. If is or is uninitialized. If one of the elements of is . The NI-DAQmx driver returned an error. If the waveform is large enough to hold the number of samples requested, this overload attempts to reuse the existing objects' memory to store acquired data. This results in more efficient memory allocation when performing subsequent reads with a continuous analog input task, if each subsequent read acquires the same or fewer number of samples. NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Performs a memory-optimized read of one or more analog waveform samples from one or more objects in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An initialized 1D array of that contains the read data. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . A reference to the parameter containing samples from the task. If the first dimension of does not match the number of channels. If the duration provided was less than . If is or is uninitialized. If one of the elements of is . The NI-DAQmx driver returned an error. If the waveform is large enough to hold the number of samples requested, this overload attempts to reuse the existing objects' memory to store acquired data. This results in more efficient memory allocation when performing subsequent reads with a continuous analog input task, if each subsequent read acquires the same or fewer number of samples. NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more analog waveform samples from one or more objects in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call , passing the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous, memory-optimized read of one or more analog waveform samples from one or more objects in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of that contains the read data. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the waveform is large enough to hold the number of samples requested, this overload attempts to reuse the existing object's memory to store acquired data. This results in more efficient memory allocation when performing subsequent reads with a continuous analog input task, if each subsequent read acquires the same or fewer number of samples. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call , passing the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous, memory-optimized read of one or more analog waveform samples from one or more objects in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of that contains the read data. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the waveform is large enough to hold the number of samples requested, this overload attempts to reuse the existing object's memory to store acquired data. This results in more efficient memory allocation when performing subsequent reads with a continuous analog input task, if each subsequent read acquires the same or fewer number of samples. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call , passing the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Contains methods for reading samples from the analog input channel in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to read from the specified .

The to read. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for readers to access the samples generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single floating-point sample from a single in a task.

A single floating-point sample from the task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more floating-point samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of floating-point samples from the task. Each element in the array corresponds to a sample from the channel. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single floating-point sample from a single in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A single floating-point sample from the task. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more floating-point samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of floating-point samples from the task. Each element in the array corresponds to a sample from the channel. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . There is not enough memory to carry out this operation. The NI-DAQmx driver returned an error during the asynchronous operation.

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

This member is obsolete. Use the method to achieve the same functionality.

The return value is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more analog waveform samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An containing samples from the task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

This member is obsolete. Use the method to achieve the same functionality.

The return value is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. This parameter is not documented because the member is obsolete.

This member is obsolete. Use the method to achieve the same functionality.

The return value is not documented because the member is obsolete. This parameter is not documented because the member is obsolete. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more analog waveform samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . An containing samples from the task. If you call before the asynchronous read is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams

Reads one or more analog waveform samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized that contains the read data. An containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing objects and their corresponding memory to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more analog waveform samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized that contains the read data. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing objects and their corresponding memory to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Reads one or more floating-point samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of floating-point samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more floating-point samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of floating-point samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Reads one or more analog waveform samples from a singlein a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized that contains the read data. Dictates the reallocation behavior of the read operation. Refer to for more information. An containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing objects and their corresponding memory to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more floating-point samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of floating-point samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more floating-point samples from a single in a task.

The number of samples to read. If you set to 1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to 1 for a finite acquisition, the read behavior is set by the property of the you are reading from. Setting to 1 returns all available samples or 2 31 1 samples, whichever is smaller. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of floating-point samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A 1D array of floating-point samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more analog waveform samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized that contains the read data. Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing objects and their corresponding memory to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . An containing samples from the task. If you call before the asynchronous read is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is not , and is not capable of holding the required number of samples. For asynchronous reads, if is or is not an instance of returned from a call to . For reads that take a duration, if the duration provided was less than . If is or is uninitialized. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Reads one or more analog waveform samples from a single object in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An containing samples from the task. If the provided was less than . The NI-DAQmx driver returned an error. NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Performs a memory-optimized read of one or more analog waveform samples from a single object in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An initialized that contains the read data. If is not large enough to hold all samples read, a new may be allocated to hold the data depending on the specified . Dictates the reallocation behavior of the read operation. Refer to for more information. A reference to the parameter containing samples from the task. If the duration provided was less than . If is not , and is not capable of holding the required number of samples. If is or is uninitialized. The NI-DAQmx driver returned an error. If the waveform is large enough to hold the number of samples requested, this overload attempts to reuse the existing objects' memory to store acquired data. This results in more efficient memory allocation when performing subsequent reads with a continuous analog input task, if each subsequent read acquires the same or fewer number of samples. NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Performs a memory-optimized read of one or more analog waveform samples from a single object in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An initialized that contains the read data. If is not large enough to hold all samples read, a new is allocated to hold the data. A reference to the parameter containing samples from the task. If the provided was less than . If is or is uninitialized. The NI-DAQmx driver returned an error. If the waveform is large enough to hold the number of samples requested, this overload attempts to reuse the existing objects' memory to store acquired data. This results in more efficient memory allocation when performing subsequent reads with a continuous analog input task, if each subsequent read acquires the same or fewer number of samples. NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more analog waveform samples from a single object in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call , passing the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous, memory-optimized read of one or more analog waveform samples from a single object in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized that contains the read data. If is not large enough to hold all samples read, a new may be allocated to hold the data depending on the specified . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the waveform is large enough to hold the number of samples requested, this overload attempts to reuse the existing object's memory to store acquired data. This results in more efficient memory allocation when performing subsequent reads with a continuous analog input task, if each subsequent read acquires the same or fewer number of samples. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call , passing the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous, memory-optimized read of one or more analog waveform samples from a single object in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized that contains the read data. If is not large enough to hold all samples read, a new is allocated to hold the data. An that represents the asynchronous call. If the waveform is large enough to hold the number of samples requested, this overload attempts to reuse the existing object's memory to store acquired data. This results in more efficient memory allocation when performing subsequent reads with a continuous analog input task, if each subsequent read acquires the same or fewer number of samples. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call , passing the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Contains methods for reading samples from one or more counter input channels in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to read from the specified .

The to read. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for readers to access the samples generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single floating-point sample from a counter task.

A floating-point sample from the task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. Use this method when counter samples are scaled to a floating-point value, such as for frequency and period measurement. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a 32-bit integer sample from a counter task.

A 32-bit integer sample from the task. Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a 32-bit unsigned integer sample from a counter task.

A 32-bit unsigned integer sample from the task. Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more floating-point samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of floating-point samples from the task. Each element in the array corresponds to a sample from the channel. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. Use this method when counter samples are scaled to a floating-point value, such as for frequency and period measurement. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit integer samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of 32-bit integer samples from the task. Each element of the array corresponds to a sample from the task. Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit unsigned integer samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of 32-bit unsigned integer samples from the task. Each element of the array corresponds to a sample from the task. Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single floating-point sample from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are scaled to a floating-point value, such as for frequency and period measurement. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A floating-point sample from the task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a 32-bit integer sample from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 32-bit integer sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a 32-bit unsigned integer sample from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 32-bit unsigned integer sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more floating-point samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are scaled to a floating-point value, such as for frequency and period measurement. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information.

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of floating-point samples from the task. Each element in the array corresponds to a sample from the channel. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit integer samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 32-bit integer samples from the task. Each element of the array corresponds to a sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit unsigned integer samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 32-bit unsigned integer samples from the task. Each element of the array corresponds to a sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Reads a pulse sample in terms of frequency from a counter task.

A pulse sample in terms of frequency from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a pulse sample in terms of time from a counter task.

A pulse sample in terms of time from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a pulse sample in terms of ticks from a counter task.

A pulse sample in terms of ticks from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more pulse samples in terms of frequency from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of pulse samples in terms of frequency from the task. Each element of the array corresponds to a sample from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more pulse samples in terms of time from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of pulse samples in terms of time from the task. Each element of the array corresponds to a sample from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more pulse samples in terms of ticks from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of pulse samples in terms of ticks from the task. Each element of the array corresponds to a sample from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single pulse sample in terms of frequency from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A pulse sample in terms of frequency from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single pulse sample in terms of time from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A pulse sample in terms of time from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single pulse sample in terms of ticks from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A pulse sample in terms of ticks from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more pulse samples in terms of frequency from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of pulse samples in terms of frequency from the task. Each element in the array corresponds to a sample from the channel. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more pulse samples in terms of time from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of pulse samples in terms of time from the task. Each element in the array corresponds to a sample from the channel. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more pulse samples in terms of ticks from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of pulse samples in terms of ticks from the task. Each element in the array corresponds to a sample from the channel. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback this is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Contains methods for writing samples to one or more digital output channels in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to write to the specified .

The to write to. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for writers to provide samples to be generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Writes a single Boolean sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of Boolean samples to write to the task. Each element of the array corresponds to a channel within the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. This method fails if the channels in the task contain more than one digital line. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes a Boolean sample to one or more objects in a task. The channels can contain one or more digital lines.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of Boolean samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a line in that channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. The NI-DAQmx driver returned an error. has a non-zero lower bound. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes a single 32-bit unsigned integer sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 32-bit unsigned integer samples to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this method for devices with up to 32 lines per port. The NI-DAQmx driver returned an error. has a non-zero lower bound. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes a single 32-bit integer sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 32-bit integer samples to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this method for devices with up to 32 lines per port. The NI-DAQmx driver returned an error. has a non-zero lower bound. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes a single 8-bit unsigned integer sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of 8-bit unsigned integer samples to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more 32-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 32-bit unsigned integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this method for devices with up to 32 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more 32-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 32-bit unsigned integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this method for devices with up to 32 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more 8-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 8-bit unsigned integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this method for devices with up to eight lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of a single Boolean sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of Boolean samples to write to the task. Each element of the array corresponds to a channel within the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. This method fails if the channels in the task contain more than one digital line. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a Boolean sample to one or more objects in a task. The channels can contain one or more digital lines.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of Boolean samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a line in that channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single 32-bit unsigned integer sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 32-bit unsigned integer samples to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single 32-bit integer sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 32-bit integer samples to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single 8-bit unsigned integer sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of 8-bit unsigned integer samples to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 32-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 32-bit unsigned integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 32-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 32-bit integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 8-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 8-bit integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 8 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous write initiated with , , , , or .

An that represents an asynchronous call started by calling , , , , or . If you call before the asynchronous write represented by the provided is complete, waits for the write to complete before returning. For a write to a buffered task, the write is considered complete when all of the written samples have been transferred to the task buffer. Use or on the object to determine if a task has generated all of the data it was configured to generate. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to , , , , or . The NI-DAQmx driver returned an error during the asynchronous operation. The data passed to , , , , or has a non-zero lower bound. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Writes one or more 16-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 16-bit integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this method for devices with up to 16 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes a single 16-bit unsigned integer sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 16-bit unsigned integer samples to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more 16-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 16-bit unsigned integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this format for devices with up to 16 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more 16-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 16-bit unsigned integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. Use this method for devices with up to 16 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of one or more 16-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 16-bit integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single 16-bit unsigned integer sample to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 16-bit unsigned integer samples to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 16-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 16-bit integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 16-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of 16-bit unsigned integer samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array correspond to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Writes one or more digital waveform samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of objects to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the digital waveform corresponds to the order in which you add the lines to the channel. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. Digital waveform writes are not affected by the or properties on the . To configure timing for digital waveform writes, use the method. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of one or more digital waveform samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of objects to write to the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the digital waveform corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Digital waveform writes are not affected by the or properties on the . To configure timing for digital waveform writes, use the method. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams

Contains methods for writing samples to the digital output channel in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to write to the specified .

The to write to. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for writers to provide samples to be generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Writes a single Boolean sample to a single digital line in a task. The task can contain only a single digital line.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A Boolean sample to write to the task. The NI-DAQmx driver returned an error. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes a single Boolean sample to a single in a task. The channel can contain multiple digital lines.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a digital line within the channel. The NI-DAQmx driver returned an error. has a non-zero lower bound. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes a single 32-bit unsigned integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. The NI-DAQmx driver returned an error. Use this method for devices with up to 32 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes a single 32-bit integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. The NI-DAQmx driver returned an error. Use this method for devices with up to 32 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes a single 8-bit unsigned integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. The NI-DAQmx driver returned an error. Use this method for devices with up to eight lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes one or more 32-bit unsigned integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. Use this method for devices with up to 32 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more 32-bit integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. Use this method for devices with up to 32 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more 8-bit unsigned integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. Use this method for devices with up to eight lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of a single Boolean sample to a single digital line in a task. The task can contain only a single digital line.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A Boolean sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single Boolean sample to a single in a task. The channel can contain multiple digital lines.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a digital line within the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single 32-bit unsigned integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single 32-bit integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single 8-bit unsigned integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 32-bit unsigned integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 32-bit integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 8-bit unsigned integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous write initiated with , , , , or .

An that represents an asynchronous call started by calling , , , , or . If you call before the asynchronous write represented by the provided is complete, waits for the write to complete before returning. For a write to a buffered task, the write is considered complete when all of the written samples have been transferred to the task buffer. Use or on the object to determine if a task has generated all of the data it was configured to generate. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to , , , , or . The NI-DAQmx driver returned an error during the asynchronous operation. The data passed to or had a non-zero lower bound. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Writes a single 16-bit integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. The NI-DAQmx driver returned an error. Use this method for devices with up to 16 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes a single 16-bit unsigned integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. The NI-DAQmx driver returned an error. Use this method for devices with up to 16 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer.

Writes one or more 16-bit integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. Use this method for devices with up to 16 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more 16-bit unsigned integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. Use this method for devices with up to 16 lines per port. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of a single 16-bit integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single 16-bit unsigned integer sample to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 32-bit integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more 16-bit unsigned integer samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Writes one or more digital waveform samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A to write to the task. The order of the lines in the digital waveform corresponds to the order in which you add the lines to the channel. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. Digital waveform writes are not affected by the or properties on the . To configure timing for digital waveform writes, use the method. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of one or more digital waveform samples to a single in a task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A to write to the task. The order of the lines in the digital waveform corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. Digital waveform writes are not affected by the or properties on the . To configure timing for digital waveform writes, use the method. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. This method returns immediately if the output buffer has sufficient space for the samples. Otherwise, the call is blocked until the application generates enough samples to fit the new data into the output buffer. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Contains methods for reading samples from one or more digital input or output channels in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to read from the specified .

The to read. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for readers to access the samples generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single Boolean sample from one or more objects in a task. Each channel can contain a single digital line.

A 1D array of Boolean samples from the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single sample containing Boolean values from one or more objects in a task. Each channel can contain multiple digital lines.

A 2D array of Boolean samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a line in that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single 8-bit unsigned integer sample from one or more objects in a task.

A 1D array of 8-bit unsigned integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to eight lines per port. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single 32-bit integer sample from one or more objects in a task.

A 1D array of 32-bit integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to 32 lines per port. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single 32-bit unsigned integer sample from one or more objects in a task.

A 1D array of 32-bit unsigned integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 8-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of 8-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of 32-bit integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of 32-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single Boolean sample from one or more objects in a task. Each channel can contain a single digital line.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . The data returned from digital waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of Boolean samples from the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single sample containing Boolean values from one or more objects in a task. Each channel can contain multiple digital lines.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of Boolean samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a line in that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; or is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single 8-bit unsigned integer sample from one or more objects in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of 8-bit unsigned integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single 32-bit integer sample from one or more objects in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 32-bit integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single 32-bit unsigned integer sample from one or more objects in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 32-bit unsigned integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 8-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of 8-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of 32-bit integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of 32-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Reads a single 16-bit integer sample from one or more objects in a task.

A 1D array of 16-bit integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to 16 lines per port. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single 16-bit unsigned integer sample from one or more objects in a task.

A 1D array of 16-bit unsigned integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 16-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of 16-bit integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 16-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of 16-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single 16-bit integer sample from one or more objects in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 16-bit integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single 16-bit unsigned integer sample from one or more objects in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 16-bit unsigned integer samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 16-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of 16-bit integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 16-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of 16-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Reads one or more digital waveform samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of objects containing samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The data returned from digital waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more digital waveform samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . The data returned from digital waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of objects containing samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Reads one or more 8-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of 8-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 8-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of 8-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; or If the first dimension of does not match the number of channels. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 16-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of 16-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 16-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of 16-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; or If the first dimension of does not match the number of channels. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of 32-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of 32-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; or If the first dimension of does not match the number of channels. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of Boolean samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a line in that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; or is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A 2D array of 8-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A 2D array of 16-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A 2D array of 32-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Reads a single sample containing Boolean values from one or more objects in a task. Each channel can contain multiple digital lines.

An initialized 2D array of boolean samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a line in that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; or If the first dimension of does not match the number of channels. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single sample containing Boolean values from one or more objects in a task. Each channel can contain multiple digital lines.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of Boolean samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a line in that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 8-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of 8-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 8-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of 8-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 16-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of 16-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 16-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of 16-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of 32-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of 32-bit unsigned integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Reads one or more 32-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of 32-bit integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of 32-bit integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; or If the first dimension of does not match the number of channels. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more 32-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of one or more 32-bit integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information.

Begins an asynchronous read of one or more 32-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of one or more 32-bit integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in .

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A 2D array of 32-bit integer samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Reads one or more digital waveform samples from one or more objects in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . A 1D array of objects containing samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If the provided was less than . The NI-DAQmx driver returned an error. NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more digital waveform samples from one or more objects in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call , passing the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Contains methods for reading samples from the digital input or output channel in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to read from the specified .

The to read. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for readers to access the samples generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single Boolean sample from a single in a task. The task can contain only a single digital line.

A Boolean sample from the task. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single Boolean sample from a single in a task. The channel can contain multiple digital lines.

A 1D array of Boolean samples from the task. Each element of the array corresponds to a digital line in the channel. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Reads a single 8-bit unsigned integer sample from a single in a task.

An 8-bit unsigned integer sample from the task. Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a single 32-bit integer sample from a single in a task.

A 32-bit integer sample from the task. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a single 32-bit unsigned integer sample from a single in a task.

A 32-bit unsigned integer sample from the task. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 8-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of 8-bit unsigned integer samples from the task. Each element in the array corresponds to a sample from the task. Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of 32-bit integer samples from the task. Each element in the array corresponds to a sample from the task. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of 32-bit unsigned integer samples from the task. Each element in the array corresponds to a sample from the task. Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single Boolean sample from a single in a task. The task can contain only a single digital line.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A Boolean sample from the task. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single Boolean sample from a single in a task. The channel can contain multiple digital lines.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of Boolean samples from the task. Each element of the array corresponds to a digital line in the channel. If is or is uninitialized; If the first dimension of does not match the number of channels; or is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single 8-bit unsigned integer sample from a single in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . An 8-bit unsigned integer sample from the task. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single 32-bit integer sample from a single in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 32-bit integer sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single 32-bit unsigned integer sample from a single in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 32-bit unsigned integer sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 8-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to eight lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 8-bit unsigned integer samples from the task. Each element in the array corresponds to a sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 32-bit integer samples from the task. Each element in the array corresponds to a sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 32 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 32-bit unsigned integer samples from the task. Each element in the array corresponds to a sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Reads a single 16-bit integer sample from a single in a task.

A 16-bit integer sample from the task. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a single 16-bit unsigned integer sample from a single in a task.

A 16-bit unsigned integer sample from the task. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 16-bit integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of 16-bit integer samples from the task. Each element in the array corresponds to a sample from the task. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 16-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of 16-bit unsigned integer samples from the task. Each element in the array corresponds to a sample from the task. Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single 16-bit integer sample from a single in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 16-bit integer sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single 16-bit unsigned integer sample from a single in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 16-bit unsigned integer sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 16-bit integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 16-bit integer samples from the task. Each element in the array corresponds to a sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 16-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method for devices with up to 16 lines per port. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of 16-bit unsigned integer samples from the task. Each element in the array corresponds to a sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Reads one or more digital waveform samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A containing samples from the task. The data returned from digital waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more digital waveform samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . The data returned from digital waveform reads is affected by the property of the you are reading from. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A containing samples from the task. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Reads one or more 8-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of 8-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 8-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of 8-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 16-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of 16-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 16-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of 16-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of 32-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of 32-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of Boolean samples from the task. Each element of the array corresponds to a digital line in the channel. If is or is uninitialized; is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A 1D array of 8-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A 1D array of 16-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A 1D array of 32-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Reads a single Boolean sample from a single in a task. The channel can contain multiple digital lines.

An initialized 1D array of Boolean samples that contains the read data. Each element in the array corresponds to a digital line in the channel. A 1D array of Boolean samples from the task. Each element of the array corresponds to a digital line in the channel. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single Boolean sample from a single in a task. The channel can contain multiple digital lines.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of Boolean samples that contains the read data. Each element in the array corresponds to a digital line in the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 8-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of 8-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 8-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of 8-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 16-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of 16-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 16-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of 16-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of 32-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit unsigned integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of 32-bit unsigned integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Reads one or more 32-bit integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of 32-bit integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more 32-bit integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of 32-bit integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Begins an asynchronous read of one or more 32-bit integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of 32-bit integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous read of one or more 32-bit integer samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of 32-bit integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous digital input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A 1D array of 32-bit integer samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Reads one or more digital waveform samples from a single in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . A containing samples from the task. If the provided was less than . The NI-DAQmx driver returned an error. NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more digital waveform samples from a single in a task for a specified .

The duration of time to read the waveform. The duration specified must be long enough to read at least one sample at the configured . An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call , passing the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units when creating channels using the create channel methods or the DAQ Assistant. The data returned from analog waveform reads is affected by the property of the being read. NI-DAQmx read and write methods time out after the amount of time specified by the property on the object used for the reads or writes. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Specifies if the signal routed from the source terminal to the destination terminal is inverted.

If the device is not capable of signal inversion or if a previous route reserved the inversion circuitry in an incompatible configuration, attempting to invert the signal causes an error.

The signal is inverted.

Contains the collection of analog input channels for a .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns an enumerator that you can use to iterate through the collection.

Enumerator for the collection. For a detailed explanation of this method, refer to in the Microsoft .NET Framework documentation. The NI-DAQmx driver returned an error.

Creates an with the specified custom scale to measure voltage. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . If the measurement requires the use of internal excitation or you need the voltage scaled by the excitation, use instead. The NI-DAQmx driver returned an error.

Creates an to measure voltage. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . If the measurement requires the use of internal excitation or you need the voltage scaled by the excitation, use instead. The NI-DAQmx driver returned an error.

Creates an that uses an RTD to measure temperature. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the measurement. The type of RTD connected to the channel. The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in amperes that the sensor requires. The sensor resistance in ohms at 0 degrees Celsius for the Callendar-Van Dusen equation. Refer to the sensor documentation for more information about this constant. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a thermistor to measure temperature. Use this method when the thermistor uses current excitation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the measurement. The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in amperes that the sensor requires. The A constant for the Steinhart-Hart thermistor equation. Consult the sensor documentation to determine the value for this constant. The B constant for the Steinhart-Hart thermistor equation. Consult the sensor documentation to determine the value for this constant. The C constant for the Steinhart-Hart thermistor equation. Consult the sensor documentation to determine the value for this constant. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a thermistor to measure temperature. Use this method when the thermistor uses voltage excitation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the measurement. The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The A constant for the Steinhart-Hart thermistor equation. Consult the sensor documentation to determine the value for this constant. The B constant for the Steinhart-Hart thermistor equation. Consult the sensor documentation to determine the value for this constant. The C constant for the Steinhart-Hart thermistor equation. Consult the sensor documentation to determine the value for this constant. The value of the dropping resistor, in ohms. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale to measure frequency using a frequency-to-voltage converter. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The voltage level at which to recognize waveform repetitions. You should select a voltage level that occurs only once within the entire period of a waveform. You also can select a voltage that occurs only once while the voltage rises or falls. A window, in volts, below . The input voltage must pass below minus before NI-DAQmx recognizes a waveform repetition. Hysteresis can improve the measurement accuracy when the signal contains noise or jitter. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale to measure resistance. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in amperes that the sensor requires. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale to measure strain. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The bridge configuration of the strain gage. The source of excitation. The amount of excitation in volts that the sensor requires. The sensitivity of the strain gages and relates the change in electrical resistance to the change in strain. Each gage in the bridge must have the same gage factor. Refer to the sensor documentation to determine this value. The output voltage of the bridge in the unloaded condition. NI-DAQmx subtracts this value from any measurements before applying scaling equations. Perform a voltage measurement on the bridge with no strain applied to determine this value. The resistance in ohms of the gages in an unstrained position. Each gage in the bridge must have the same nominal gage resistance. The resistance across arms of the bridge that do not have strain gages must also be the same as the nominal gage resistance. Refer to the sensor documentation to determine this value. The ratio of lateral strain to axial strain in the material you are measuring. The amount in ohms of resistance in the lead wires. Ideally, this value is the same for all leads. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale to measure voltage for custom sensors that require excitation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The bridge configuration. If you set to , has no effect. The source of excitation. The amount of excitation in volts that the sensor requires. if NI-DAQmx divides the measurement by the excitation. Typically, you set to for ratiometric tranducers. If you set to , set and to reflect the scaling. For example, if you expect to acquire a voltage between 5 and 5, and you use an excitation of .10 volts to scale the measurement, set to 50 and set to 50. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an to measure temperature with a built-in sensor of a terminal block or device. This method adds one or more physical channels to the . The method has been deprecated in favor of the method.

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. On SCXI modules, the built-in sensor might be the CJC sensor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Gets the number of elements in the collection.

The number of elements contained in the collection. The NI-DAQmx driver returned an error.

Gets an that operates on all of the channels in the task.

An that operates on all of the channels in a task. The NI-DAQmx driver returned an error.

Gets the with the specified virtual channel name. In Visual C#, this property is the indexer.

One or more virtual channel names that the retrieved operates on. The specified . By using a comma or colon in , you can retrieve more than one channel at a time. For more information refer to Channels. Channels The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Creates an to measure frequency using a frequency-to-voltage converter. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The voltage level at which to recognize waveform repetitions. You should select a voltage level that occurs only once within the entire period of a waveform. You also can select a voltage that occurs only once while the voltage rises or falls. A window, in volts, below . The input voltage must pass below minus before NI-DAQmx recognizes a waveform repetition. Hysteresis can improve the measurement accuracy when the signal contains noise or jitter. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an to measure resistance. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in amperes that the sensor requires. Refer to sensor documentation to determine this value. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an to measure strain. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The bridge configuration of the strain gage. The source of excitation. The amount of excitation in volts that the sensor requires. The sensitivity of the strain gages and relates the change in electrical resistance to the change in strain. Each gage in the bridge must have the same gage factor. Refer to the sensor documentation to determine this value. The output voltage of the bridge in the unloaded condition. NI-DAQmx subtracts this value from any measurements before applying scaling equations. Perform a voltage measurement on the bridge with no strain applied to determine this value. The resistance in ohms of the gages in an unstrained position. Each gage in the bridge must have the same nominal gage resistance. The resistance across arms of the bridge that do not have strain gages must also be the same as the nominal gage resistance. Refer to the sensor documentation to determine this value. The ratio of lateral strain to axial strain in the material you are measuring. The amount in ohms of resistance in the lead wires. Ideally, this value is the same for all leads. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an to measure voltage for custom sensors that require excitation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The bridge configuration. If you set to , has no effect. The source of excitation. The amount of excitation in volts that the sensor requires. if NI-DAQmx divides the measurement by the excitation. Typically, you set to for ratiometric tranducers. If you set to , set and to reflect the scaling. For example, if you expect to acquire a voltage between 5 and 5, and you use an excitation of .10 volts to scale the measurement, set to 50 and set to 50. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a thermocouple to measure temperature using a built-in cold-junction compensation source. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a thermocouple to measure temperature using a constant value cold-junction compensation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range. The units to use to return the temperature measurement. The temperature in of the cold-junction. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a thermocouple to measure temperature using a measurement on another channel for cold-junction compensation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range. The units to use to return the measurement.>The channel that acquires the temperature of the thermocouple cold-junction if you set to . You can use a global channel or another virtual channel already in the task. If the channel is a temperature channel, NI-DAQmx acquires the temperature in the correct units. Other channel types, such as a resistance channel with a custom sensor, must use a custom scale to scale values to degrees Celsius. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .The NI-DAQmx driver returned an error.

Creates an with an internal shunt resistor to measure current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. Use this method with devices that have a built-in shunt resistor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale and an internal shunt resistor to measure current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. Use this method with devices that have a built-in shunt resistor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified external shunt resistor to measure current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The value in ohms of an external shunt resistor. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. Use this method with devices that do not have a built-in shunt resistor. You must attach an external shunt resistor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale and external shunt resistor to measure current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The value in ohms of an external shunt resistor. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. Use this method with devices that do not have a built-in shunt resistor. You must attach an external shunt resistor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Gets the at the specified index. In Visual C#, this property is the indexer.

The zero-based index of the entry to locate in the collection. The at the specified index. The NI-DAQmx driver returned an error. Channels

Copies the collection to an array or a portion of an array. This operation is not supported for .

Destination array for the collection. The index in the target array at which you want to begin copying the collection to. This method always throws a .

Creates an to measure temperature with a built-in sensor of a terminal block or device. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. On SCXI modules, the built-in sensor might be the CJC sensor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses an accelerometer to measure acceleration. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The sensitivity of the sensor. This value is in the units you specify with . Refer to sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation in amps that the sensor requires. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale that uses an accelerometer to measure acceleration. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The sensitivity of the sensor. This value is in the units you specify with . Refer to sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation in amps that the sensor requires. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses an LVDT to measure linear position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation in volts that the sensor requires. The excitation frequency that the sensor requires, in hertz. Refer to the sensor documentation to determine this value. The number of leads on the sensor. Some sensors might require you to tie leads together to create a four- or five-wire sensor. Refer to the documentation for your sensor for more information. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale that uses an LVDT to measure linear position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation in volts that the sensor requires. The excitation frequency that the sensor requires, in hertz. Refer to the sensor documentation to determine this value. The number of leads on the sensor. Some sensors might require you to tie leads together to create a four- or five-wire sensor. Refer to the documentation for your sensor for more information. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses an RVDT to measure angular position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation in volts that the sensor requires. The excitation frequency that the sensor requires, in hertz. Refer to the sensor documentation to determine this value. The number of leads on the sensor. Some sensors might require you to tie leads together to create a four- or five-wire sensor. Refer to the documentation for your sensor for more information. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale that uses an RVDT to measure angular position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation in volts that the sensor requires. The excitation frequency that the sensor requires, in hertz. Refer to the sensor documentation to determine this value. The number of leads on the sensor. Some sensors require you to tie leads together to create a four- or five-wire sensor. Refer to the documentation for your sensor for more information. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an to measure voltage. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The units to use to return the voltage measurement. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . If the measurement requires the use of internal excitation or you need the voltage to be scaled by the excitation, use instead.

Creates an with the specified custom scale to measure voltage. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . If the measurement requires the use of internal excitation or you need the voltage to be scaled by the excitation, use instead.

Creates an with an internal shunt resistor to measure current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The units to use to return the current measurement. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified custom scale and an internal shunt resistor to measure current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified external shunt resistor to measure current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The value in ohms of an external shunt resistor. The units to use to return the current measurement. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified custom scale and external shunt resistor to measure current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The value in ohms of an external shunt resistor. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses a thermocouple to measure temperature using a built-in cold-junction compensation source. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the temperature measurement. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses a thermocouple to measure temperature using a constant value cold-junction compensation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the temperature measurement. The temperature in of the cold-junction. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses a thermocouple to measure temperature using a measurement on another channel for cold-junction compensation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the temperature measurement.>The channel that acquires the temperature of the thermocouple cold-junction if you set to . You can use a global channel or another virtual channel already in the task. If the channel is a temperature channel, NI-DAQmx acquires the temperature in the correct units. Other channel types, such as a resistance channel with a custom sensor, must use a custom scale to scale values to degrees Celsius. The newly created .The NI-DAQmx driver returned an error.You must configure the physical channel(s) with TEDS information to use this method.The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses an RTD to measure temperature. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the temperature measurement. The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in amperes that the sensor requires. Refer to the sensor documentation to determine this value. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses a thermistor to measure temperature. Use this method when the thermistor uses current excitation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the temperature measurement. The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in amperes that the sensor requires. Refer to the sensor documentation to determine this value. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses a thermistor to measure temperature. Use this method when the thermistor uses voltage excitation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the temperature measurement. The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The value of the reference resistor, in ohms. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an to measure resistance. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in amperes that the sensor requires. Refer to the sensor documentation to determine this value. The units to use to return the resistance measurement. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified custom scale to measure resistance. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The number of wires to use for resistive measurements. The source of excitation. The amount of excitation in amperes that the sensor requires. Refer to the sensor documentation to determine this value. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an to measure voltage for custom sensors that require excitation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The units to use to return the voltage measurement. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified custom scale to measure voltage for custom sensors that require excitation. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses an accelerometer to measure acceleration. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The source of excitation. The amount of excitation in amps that the sensor requires. Refer to the sensor documentation to determine this value. The units to use to return the acceleration measurement from the channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified custom scale that uses an accelerometer to measure acceleration. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The source of excitation. The amount of excitation in amps that the sensor requires. Refer to the sensor documentation to determine this value. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an to measure strain. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The output voltage of the bridge in the unloaded condition. NI-DAQmx subtracts this value from any measurements before applying scaling equations. Perform a voltage measurement on the bridge with no strain applied to determine this value. The amount of resistance in ohms in the lead wires. Ideally, this value is the same for all leads. The units to use to return the strain measurement. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified custom scale to measure strain. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The output voltage of the bridge in the unloaded condition. NI-DAQmx subtracts this value from any measurements before applying scaling equations. Perform a voltage measurement on the bridge with no strain applied to determine this value. The amount of resistance in ohms in the lead wires. Ideally, this value is the same for all leads. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses a microphone to measure sound pressure. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The sensitivity of the microphone. Specify this value in millivolts per pascal. The maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals. The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The source of excitation. The amount of excitation in amperes that the sensor requires. Refer to the sensor documentation to determine this value. The units to use to return the sound pressure measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale that uses a microphone to measure sound pressure. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The sensitivity of the microphone. Specify this value in millivolts per pascal. The maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals. The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The source of excitation. The amount of excitation in amperes that the sensor requires. Refer to the sensor documentation to determine this value. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a microphone to measure sound pressure. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The sensitivity of the microphone. Specify this value in millivolts per pascal. The maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals. The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The source of excitation. The amount of excitation in amperes that the sensor requires. Refer to the sensor documentation to determine this value. The units to use to return the sound pressure measurement. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified custom scale that uses a microphone to measure sound pressure. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The sensitivity of the microphone. Specify this value in millivolts per pascal. The maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals. The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The source of excitation. The amount of excitation in amperes that the sensor requires. Refer to the sensor documentation to determine this value. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses an LVDT to measure linear position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The excitation frequency that the sensor requires, in hertz. Refer to the sensor documentation to determine this value. The number of leads on the sensor. Some sensors require you to tie leads together to create a four- or five-wire sensor. Refer to the documentation for your sensor for more information. The units to use to return the linear position measurement from the channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified custom scale that uses an LVDT to measure linear position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The excitation frequency that the sensor requires, in hertz. Refer to the sensor documentation to determine this value. The number of leads on the sensor. Some sensors require you to tie leads together to create a four- or five-wire sensor. Refer to the documentation for your sensor for more information. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses an RVDT to measure angular position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The excitation frequency that the sensor requires, in hertz. Refer to the sensor documentation to determine this value. The number of leads on the sensor. Some sensors require you to tie leads together to create a four- or five-wire sensor. Refer to the documentation for your sensor for more information. The units to use to return the angular position measurement from the channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses an RVDT to measure angular position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The source of excitation. The amount of excitation in volts that the sensor requires. Refer to the sensor documentation to determine this value. The excitation frequency that the sensor requires, in hertz. Refer to the sensor documentation to determine this value. The number of leads on the sensor. Some sensors require you to tie leads together to create a four- or five-wire sensor. Refer to the documentation for your sensor for more information. The name of the custom scale to apply to the local virtual channel. The newly created . The NI-DAQmx driver returned an error. You must configure the physical channel(s) with TEDS information to use this method. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an with the specified custom scale to measure AC voltage. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value you expect to measure, in units. The maximum value you expect to measurement, in units. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . If the measurement requires the use of internal excitation or you need the voltage scaled by the excitation, use instead. The NI-DAQmx driver returned an error.

Creates an with the specified custom scale and an internal shunt resistor to measure AC current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. Use this method with devices that have a built-in shunt resistor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale and external shunt resistor to measure AC current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The value in ohms of an external shunt resistor. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. Use this method with devices that do not have a built-in shunt resistor. You must attach an external shunt resistor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an to measure AC voltage. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value you expect to measure, in . The maximum value you expect to measure, in . The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . If the measurement requires the use of internal excitation or you need the voltage scaled by the excitation, use instead. The NI-DAQmx driver returned an error.

Creates an with an internal shunt resistor to measure AC current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. Use this method with devices that have a built-in shunt resistor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified external shunt resistor to measure AC current. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value you expect to measure, in . The maximum value you expect to measure, in . The value in ohms of an external shunt resistor. The units to use to return the measurement. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. Use this method with devices that do not have a built-in shunt resistor. You must attach an external shunt resistor. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses an Eddy Current Proximity Probe to measure position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . Specifies the units to use to return position measurements from the channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale that uses an Eddy Current Proximity Probe to measure position. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure force or load, with the specified custom scale. Use this instance with sensors whose specifications do not provide a polynomial for scaling or a table of electrical and physical values. When you use this scaling type, NI-DAQmx uses two points of electrical and physical values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The first electrical value, corresponding to . Specify this value in the units specified with . The second electrical value, corresponding to . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The first physical value, corresponding to . Specify this value in the units specified with . The second physical value, corresponding to . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure force or load. Use this instance with sensors whose specifications do not provide a polynomial for scaling or a table of electrical and physical values. When you use this scaling type, NI-DAQmx uses two points of electrical and physical values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The first electrical value, corresponding to . Specify this value in the units specified with . The second electrical value, corresponding to . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The first physical value, corresponding to . Specify this value in the units specified with . The second physical value, corresponding to . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure force or load, with the specified custom scale. Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values. When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with the minimum value and maximum value parameters must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of electrical values that map to the values in . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The array of physical values that map to the values in . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure force or load. Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values. When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with the minimum value and maximum value parameters must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of electrical values that map to the values in . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The array of physical values that map to the values in . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure force or load, with the specified custom scale. Use this instance with sensors whose specifications provide a polynomial to convert electrical values to physical values. When you use this scaling type, NI-DAQmx requires coefficients for a polynomial that converts electrical values to physical values (forward), as well as coefficients for a polynomial that converts physical values to electrical values (reverse). If you only know one set of coefficients, use to generate the other set. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of the forward coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. The array of the reverse coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y3. Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. Specifies to which physical units to scale electrical data. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure force or load. Use this instance with sensors whose specifications provide a polynomial to convert electrical values to physical values. When you use this scaling type, NI-DAQmx requires coefficients for a polynomial that converts electrical values to physical values (forward), as well as coefficients for a polynomial that converts physical values to electrical values (reverse). If you only know one set of coefficients, use to generate the other set. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of the forward coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. The array of the reverse coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y3. Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. Specifies to which physical units to scale electrical data. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure pressure, with the specified custom scale. Use this instance with sensors whose specifications do not provide a polynomial for scaling or a table of electrical and physical values. When you use this scaling type, NI-DAQmx uses two points of electrical and physical values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The first electrical value, corresponding to . Specify this value in the units specified with . The second electrical value, corresponding to . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The first physical value, corresponding to . Specify this value in the units specified with . The second physical value, corresponding to . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure pressure. Use this instance with sensors whose specifications do not provide a polynomial for scaling or a table of electrical and physical values. When you use this scaling type, NI-DAQmx uses two points of electrical and physical values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The first electrical value, corresponding to . Specify this value in the units specified with . The second electrical value, corresponding to . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The first physical value, corresponding to . Specify this value in the units specified with . The second physical value, corresponding to . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure pressure, with the specified custom scale. Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values. When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with the minimum value and maximum value parameters must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of electrical values that map to the values in . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The array of physical values that map to the values in . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure pressure. Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values. When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with the minimum value and maximum value parameters must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of electrical values that map to the values in . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The array of physical values that map to the values in . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure pressure, with the specified custom scale. Use this instance with sensors whose specifications provide a polynomial to convert electrical values to physical values. When you use this scaling type, NI-DAQmx requires coefficients for a polynomial that converts electrical values to physical values (forward), as well as coefficients for a polynomial that converts physical values to electrical values (reverse). If you only know one set of coefficients, use to generate the other set. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of the forward coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. The array of the reverse coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y3. Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure pressure. Use this instance with sensors whose specifications provide a polynomial to convert electrical values to physical values. When you use this scaling type, NI-DAQmx requires coefficients for a polynomial that converts electrical values to physical values (forward), as well as coefficients for a polynomial that converts physical values to electrical values (reverse). If you only know one set of coefficients, use to generate the other set. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of the forward coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. The array of the reverse coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y3. Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure torque, with the specified custom scale. Use this instance with sensors whose specifications do not provide a polynomial for scaling or a table of electrical and physical values. When you use this scaling type, NI-DAQmx uses two points of electrical and physical values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The first electrical value, corresponding to . Specify this value in the units specified with . The second electrical value, corresponding to . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The first physical value, corresponding to . Specify this value in the units specified with . The second physical value, corresponding to . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure torque, with the specified custom scale. Use this instance with sensors whose specifications do not provide a polynomial for scaling or a table of electrical and physical values. When you use this scaling type, NI-DAQmx uses two points of electrical and physical values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The first electrical value, corresponding to . Specify this value in the units specified with . The second electrical value, corresponding to . Specify this value in the units specified with . Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The first physical value, corresponding to . Specify this value in the units specified with . The second physical value, corresponding to . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure torque, with the specified custom scale. Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values. When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with the minimum value and maximum value parameters must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of electrical values that map to the values in . Specify this value in the units specified with . The array of the forward coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. The array of the reverse coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y3. Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The array of physical values that map to the values in . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure torque, with the specified custom scale. Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values. When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with the minimum value and maximum value parameters must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of electrical values that map to the values in . Specify this value in the units specified with . The array of the forward coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. The array of the reverse coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y3. Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. The array of physical values that map to the values in . Specify this value in the units specified with . Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure torque, with the specified custom scale. Use this instance with sensors whose specifications provide a polynomial to convert electrical values to physical values. When you use this scaling type, NI-DAQmx requires coefficients for a polynomial that converts electrical values to physical values (forward), as well as coefficients for a polynomial that converts physical values to electrical values (reverse). If you only know one set of coefficients, use to generate the other set. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of the forward coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. The array of the reverse coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y3. Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure torque. Use this instance with sensors whose specifications provide a polynomial to convert electrical values to physical values. When you use this scaling type, NI-DAQmx requires coefficients for a polynomial that converts electrical values to physical values (forward), as well as coefficients for a polynomial that converts physical values to electrical values (reverse). If you only know one set of coefficients, use to generate the other set. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The array of the forward coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x3. The array of the reverse coefficients of the polynomial. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9y3. Specifies from which electrical units to scale data. Use the units that correspond to the units used for electrical values provided by the sensor data sheet or calibration certificate. Specifies to which physical units to scale electrical data. The newly created . Specify different values for if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that measures voltage ratios from a Wheatstone bridge, with the specified custom scale. Use this instance with bridge-based sensors that measure phenomena other than strain, force, pressure, or torque, or that scale data to physical units NI-DAQmx does not support. This method adds one or more physical channels to the . Use a custom scale or other scaling code to convert the voltage ratios to physical units.

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that measures voltage ratios from a Wheatstone bridge. Use this instance with bridge-based sensors that measure phenomena other than strain, force, pressure, or torque, or that scale data to physical units NI-DAQmx does not support. This method adds one or more physical channels to the . Use a custom scale or other scaling code to convert the voltage ratios to physical units.

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The type of Wheatstone bridge configuration connected to the channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The resistance, in ohms, of the bridge while not under load. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that measures a a Wheatstone bridge, with the specified custom scale. You must configure the physical channel(s) with TEDS information to use this method. Use this instance with bridge-based sensors that measure phenomena other than strain, force, pressure, or torque, or that scale data to physical units NI-DAQmx does not support. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The units to use to return the measurement. The source of excitation. The amount of excitation in volts that the sensor requires. The newly created . The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that measures a a Wheatstone bridge. You must configure the physical channel(s) with TEDS information to use this method. Use this instance with bridge-based sensors that measure phenomena other than strain, force, pressure, or torque, or that scale data to physical units NI-DAQmx does not support. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The source of excitation. The amount of excitation in volts that the sensor requires. The newly created . The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses a Wheatstone bridge to measure force or load, with the specified custom scale. You must configure the physical channel(s) with TEDS information to use this method. NI-DAQmx scales electrical values to physical values according to that TEDS information. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The name of the custom scale to apply to the local virtual channel. The source of excitation. The amount of excitation in volts that the sensor requires. The newly created . The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses a Wheatstone bridge to measure force or load. You must configure the physical channel(s) with TEDS information to use this method. NI-DAQmx scales electrical values to physical values according to that TEDS information. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The source of excitation. The amount of excitation in volts that the sensor requires. The newly created . The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses a Wheatstone bridge to measure pressure, with the specified custom scale. You must configure the physical channel(s) with TEDS information to use this method. NI-DAQmx scales electrical values to physical values according to that TEDS information. This method adds one or more physical channels to the . You must configure the physical channel(s) with TEDS information to use this method.

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure pressure. You must configure the physical channel(s) with TEDS information to use this method. NI-DAQmx scales electrical values to physical values according to that TEDS information. This method adds one or more physical channels to the . You must configure the physical channel(s) with TEDS information to use this method.

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The source of excitation. The amount of excitation, in volts, that the sensor requires. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure torque, with the specified custom scale. You must configure the physical channel(s) with TEDS information to use this method. NI-DAQmx scales electrical values to physical values according to that TEDS information. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The source of excitation. The amount of excitation, in volts, that the sensor requires. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses a Wheatstone bridge to measure torque. You must configure the physical channel(s) with TEDS information to use this method. NI-DAQmx scales electrical values to physical values according to that TEDS information. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The source of excitation. The amount of excitation, in volts, that the sensor requires. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses an IEPE force sensor to measure force or load, with the specified custom scale. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of 1 casted to an . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The name of the custom scale to apply to the local virtual channel. The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation, in amperes, that the sensor requires. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses an IEPE force sensor to measure force or load. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of 1 casted to an . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation, in amperes, that the sensor requires. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that uses an IEPE force sensor to measure force or load, with the specified custom scale. You must configure the physical channel(s) with TEDS information to use this method. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of 1 casted to an . The minimum value you expect to measure, in custom scaled units. The maximum value you expect to measure, in custom scaled units. The name of the custom scale to apply to the local virtual channel. The source of excitation. The amount of excitation in amperes that the sensor requires. The newly created . The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses an IEPE force sensor to measure force or load. You must configure the physical channel(s) with TEDS information to use this method. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of 1 casted to an . The minimum value you expect to measure, in units. The maximum value you expect to measure, in units. The units to use to return the measurement. The source of excitation. The amount of excitation in amperes that the sensor requires. The newly created . The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that uses an IEPE velocity sensor to measure velocity. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The name of the custom scale to apply to the local virtual channel. The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation in amperes that the sensor requires. The newly created .

Creates an that uses an IEPE velocity sensor to measure velocity. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The input terminal configuration. To use the default terminal configuration for the physical channel(s) being used, pass a value of -1 casted to an . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The units to use to return the measurement. The sensitivity of the sensor. This value is in the units you specify with . Refer to the sensor documentation to determine this value. The units of . The source of excitation. The amount of excitation in amperes that the sensor requires. The newly created .

Creates an to measure two-dimensional strain using a rosette strain gage. This method adds one or more physical channels to the .

The names of one or more physical channels to use to create one or more virtual strain gage channels. One or more names to assign to the created local virtual channels. The minimum strain you expect to measure. This value applies to each strain gage in the rosette. The maximum strain you expect to measure. This value applies to each strain gage in the rosette The bridge configuration for the strain gages. The possible values for this parameter are listed in . The amount of resistance in ohms in the lead wires. Ideally, this value is the same for all leads. The source of excitation. The possible values for this parameter are listed in . The amount of excitation in volts supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values. The sensitivity of the strain gages and relates the change in electrical resistance to the change in strain. Each gage in the bridge must have the same gage factor. Refer to the sensor documentation to determine this value. The resistance in ohms of the gages in an unstrained position. Each gage in the bridge must have the same nominal gage resistance. The resistance across arms of the bridge that do not have strain gages must also be the same as the nominal gage resistance. Refer to the sensor documentation to determine this value. The ratio of lateral strain to axial strain in the material you are measuring. The type of the rosette. The possible values for this parameter are listed in . The orientation, in degrees, of the gage with respect to the preferred X axis. An array of that specifies the virtual channels to create for the rosette measurements. For each rosette sensor, this method creates one strain virtual channel for each strain gage in the rosette, and one rosette virtual channel for each measurement specified in the rosette measurements array. . The newly created . The NI-DAQmx driver returned an error. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you use this input to provide your own names for the virtual channels, you must use the names when you refer to these channels in other methods. physicalChannelName Considerations For each rosette sensor, this method creates one strain virtual channel for each strain gage in the rosette, and one rosette virtual channel for each measurement specified in the rosette measurements array. For the type, at least 2 physical channels are required. For the and types, at least 3 physical channels are required. You are also able to specify a multiple of the required number of physical channels to create the virtual channels necessary for multiple rosette sensors. The order of these channels is critical for proper rosette measurements and should be in the order of the gages in the rosette. The gages in the rosette are typically labeled as A, B, and C or 1, 2, and 3 which is the order required by DAQmx. The DAQmx physical channel constant lists all physical channels on devices and modules installed in the system. You also can wire a string that contains a list or range of physical channels to this input. nameToAssignChannel Considerations If you do not define a value for this input, NI-DAQmx creates a default channel name. The format of this name is rosette#_TYPE, where # is an index number incremented to the first unique value, and TYPE is the channel type. Name FormatType rosette#_strainGage1 Strain gage 1. rosette#_strainGage2 Strain gage 2. rosette#_strainGage3 Strain gage 3. rosette#_principalStrain1 Principal strain 1. rosette#_principalStrain2 Principal strain 2. rosette#_principalStrainAngle Principal strain angle. rosette#_cartesianStrainX Cartesian strain X. rosette#_cartesianStrainY Cartesian strain Y. rosette#_cartesianShearStrainXY Cartesian shear strain XY. rosette#_maximumShearStrain Maximum shear strain. rosette#_maximumShearStrainAngle Minimum shear strain.

Creates an to measure acceleration using a charge-based sensor. This method adds one or more physical channels to the .

The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , you must use the names when you refer to these channels in other NI-DAQmx methods. The input for the channel. The minimum value, in , that you expect to measure. The maximum value, in , that you expect to measure. The name of a custom scale to apply to the channel. To use this parameter, you must set to . If you do not set units to , you must set to . The NI-DAQmx driver returned an error. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an to measure acceleration using a charge-based sensor. This method adds one or more physical channels to the .

The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , you must use the names when you refer to these channels in other NI-DAQmx methods. The input for the channel. The minimum value, in , that you expect to measure. The maximum value, in , that you expect to measure. The units to use to return acceleration measurements from the channel. The NI-DAQmx driver returned an error. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates channel(s) that use an accelerometer to measure acceleration and adds the channel(s) to the task you specify with .

The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , you must use the names when you refer to these channels in other NI-DAQmx methods. The input for the channel. The minimum value, in , that you expect to measure. The maximum value, in , that you expect to measure. The name of a custom scale to apply to the channel. To use this parameter, you must set to . If you do not set units to , you must set to . The sensitivity of the sensor. This value is in the units you specify with the input. Refer to the sensor documentation to determine this value. The units of .

Creates channel(s) that use an accelerometer to measure acceleration and adds the channel(s) to the task you specify with .

The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , you must use the names when you refer to these channels in other NI-DAQmx methods. The input for the channel. The minimum value, in , that you expect to measure. The maximum value, in , that you expect to measure. The units to use to return acceleration measurements from the channel. The sensitivity of the sensor. This value is in the units you specify with the input. Refer to the sensor documentation to determine this value. The units of . Refer to accelerometers in the NI-DAQmx Help.

Creates an that specifies the sensitivity of the 4-wire, DC voltage-based sensor connected to the channel. This method adds one or more physical channels to the .

The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , you must use the names when you refer to these channels in other NI-DAQmx methods. The input for the channel. The minimum value, in , that you expect to measure. The maximum value, in , that you expect to measure. The name of a custom scale to apply to the channel. To use this parameter, you must set to . If you do not set units to , you must set to . The sensitivity of the sensor. This value is in the units you specify with the input. Refer to the sensor documentation to determine this value. The units of . The source of excitation. TODO - There are values for this specified in the C API. Include them here, or should this reference an enum? Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values. Specifies whether NI-DAQmx divides the measurement by the excitation. You should typically set to for ratiometric transducers. If you set to , set and to reflect the scaling. The NI-DAQmx driver returned an error. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Creates an that measures acceleration using a 4-wire, DC voltage-based sensor connected to the channel. This method adds one or more physical channels to the .

The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , you must use the names when you refer to these channels in other NI-DAQmx methods. The input for the channel. The minimum value, in , that you expect to measure. The maximum value, in , that you expect to measure. The units to use to return acceleration measurements from the channel. The sensitivity of the sensor. This value is in the units you specify with the input. Refer to the sensor documentation to determine this value. The units of . The source of excitation. TODO - There are values for this specified in the C API. Include them here, or should this reference an enum? Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values. Specifies whether NI-DAQmx divides the measurement by the excitation. You should typically set to for ratiometric transducers. If you set to , set and to reflect the scaling. The NI-DAQmx driver returned an error. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Contains the collection of analog output channels for a .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns an enumerator that you can use to iterate through the collection.

Enumerator for the collection. For a detailed explanation of this method, refer to in the Microsoft .NET Framework documentation. The NI-DAQmx driver returned an error.

Creates an with the specified custom scale to generate voltage. This method adds one or more channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value to generate. The maximum value to generate. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an to generate voltage. This method adds one or more channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value to generate, in . The maximum value to generate, in . The units to use to generate voltage. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an with the specified custom scale to generate current. This method adds one or more channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value to generate, in units. The maximum value to generate, in units. The name of the custom scale to apply to the local virtual channel. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an to generate current. This method adds one or more channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The minimum value to generate, in . The maximum value to generate, in . The units to use to generate current. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Gets the number of elements in the collection.

The number of elements contained in the collection. The NI-DAQmx driver returned an error.

Gets an that operates on all of the channels in the task.

An that operates on all of the channels in a task. The NI-DAQmx driver returned an error.

Gets the with the specified virtual channel name. In Visual C#, this property is the indexer.

One or more virtual channel names that the retrieved operates on. The specified . By using a comma or colon in , you can retrieve more than one channel at a time. For more information refer to Channels. Channels The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the at the specified index. In Visual C#, this property is the indexer.

The zero-based index of the entry to locate in the collection. The at the specified index. The NI-DAQmx driver returned an error. Channels

Copies the collection to an array or a portion of an array. This operation is not supported for .

Destination array for the collection. The index in the target array at which you want to begin copying the collection to. This method always throws a .

Creates an that continuously generates a waveform with the specificed waveform type, frequency, amplitude, and offset. This method adds one or more channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The to generate. The desired frequency of the output . The desired amplitude of the output , in units of volts zero-to-peak. Zero and negative values are valid. The desired offset of the output . The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates an that continuously generates a waveform with the specificed waveform type, frequency, and amplitude. This method adds one or more channels to the .

The names of one or more physical channels to use to create one or more local virtual channels. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The to generate. The desired frequency of the output . The desired amplitude of the output , in units of volts zero-to-peak. Zero and negative values are valid. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Contains the collection of digital input channels for a .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns an enumerator that you can use to iterate through the collection.

Enumerator for the collection. For a detailed explanation of this method, refer to in the Microsoft .NET Framework documentation. The NI-DAQmx driver returned an error.

Creates a to measure digital signals. This method adds one or more channels to the .

The names of the digital lines or ports to use to create the virtual channel. The name of the virtual channel this method creates. The grouping of digital lines into one or more objects. If you specify one or more entire ports with , you must set to . You can group digital lines into one or separate them into multiple objects. If you specify one or more entire ports with by using port physical channel names, you cannot separate the ports into multiple channels. To separate ports into multiple channels, use this method multiple times with a different port each time. If you do not specify a value for , NI-DAQmx uses the physical channel name for the virtual channel name. If you use to create a name for the local virtual channel, you must use that name when you refer to this channel in other NI-DAQmx properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Gets the number of elements in the collection.

The number of elements contained in the collection. The NI-DAQmx driver returned an error.

Gets a that operates on all of the channels in the task.

A that operates on all of the channels in a task. The NI-DAQmx driver returned an error.

Gets the with the specified virtual channel name. In Visual C#, this property is the indexer.

One or more virtual channel names that the retrieved operates on. The specified . Channels The NI-DAQmx driver returned an error. By using a comma or colon in , you can retrieve more than one channel at a time. For more information refer to Channels.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the at the specified index. In Visual C#, this property is the indexer.

The zero-based index of the entry to locate in the collection. The at the specified index. The NI-DAQmx driver returned an error. Channels

Copies the collection to an array or a portion of an array. This operation is not supported for .

Destination array for the collection. The index in the target array at which you want to begin copying the collection to. This method always throws a .

Contains the collection of digital output channels for a .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns an enumerator that you can use to iterate through the collection.

Enumerator for the collection. For a detailed explanation of this method, refer to in the Microsoft .NET Framework documentation. The NI-DAQmx driver returned an error.

Creates a to generate digital signals. This method adds one or more channels to the .

The names of the digital lines or ports to use to create the virtual channel. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The grouping of digital lines into one or more objects. If you specify one or more entire ports with , you must set to . You can group digital lines into one or separate them into multiple objects. If you specify one or more entire ports with by using port physical channel names, you cannot separate the ports into multiple channels. To separate ports into multiple channels, use this method multiple times with a different port each time. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Gets the number of elements in the collection.

The number of elements contained in the collection. The NI-DAQmx driver returned an error.

Gets a that operates on all of the channels in the task.

A that operates on all of the channels in a task. The NI-DAQmx driver returned an error.

Gets the with the specified virtual channel name. In Visual C#, this property is the indexer.

One or more virtual channel names that the retrieved operates on. The specified . Channels The NI-DAQmx driver returned an error. By using a comma or colon in , you can retrieve more than one channel at a time. For more information refer to Channels.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the at the specified index. In Visual C#, this property is the indexer.

The zero-based index of the entry to locate in the collection. The at the specified index. The NI-DAQmx driver returned an error. Channels

Copies the collection to an array or a portion of an array. This operation is not supported for .

Destination array for the collection. The index in the target array at which you want to begin copying the collection to. This method always throws a .

Contains the collection of counter/timer input channels for a .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns an enumerator that you can use to iterate through the collection.

Enumerator for the collection. For a detailed explanation of this method, refer to in the Microsoft .NET Framework documentation. The NI-DAQmx driver returned an error.

Creates a with the specified custom scale to measure the frequency of a digital signal. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The edges between which to measure the frequency. The method to use to calculate the frequency of the signal. The length of time to measure the frequency of a digital signal when is . Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, the count register might roll over, resulting in an incorrect measurement. The value by which to divide the input signal, when is . The larger the , the more accurate the measurement. However, too large a value might cause the count register to roll over, resulting in an incorrect measurement. The name of the custom scale to apply to the local virtual channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a with the specified custom scale to measure the period of a digital signal. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The edges between which to measure the period of the signal. The method to use to calculate the period of the signal. The length of time to measure the period of a digital signal when is . Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, the count register might roll over, resulting in an incorrect measurement. The value by which to divide the input signal, when is . The larger the , the more accurate the measurement. However, too large a value might cause the count register to roll over, resulting in an incorrect measurement. The name of the custom scale to apply to the local virtual channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a to count the number of rising or falling edges of a digital signal. This method adds one channel to the .

The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The edge of the source signal to increment or decrement the count. The value from which to start counting. The direction in which to change the count on each edge. The newly created . With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a with the specified custom scale to measure the width of a digital pulse. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The edge to begin measuring the pulse width. The value of determines whether to measure a high or low pulse. The name of the custom scale to apply to the local virtual channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a with the specified custom scale to measure the time between state transitions of a digital signal. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The name of the custom scale to apply to the local virtual channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a to measure the time between state transitions of a digital signal. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the measurement. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Gets the number of elements in the collection.

The number of elements contained in the collection. The NI-DAQmx driver returned an error.

Gets a that operates on all of the channels in the task.

A that operates on all of the channels in a task. The NI-DAQmx driver returned an error.

Gets the with the specified virtual channel name. In Visual C#, this property is the indexer.

One or more virtual channel names that the retrieved operates on. The specified . Channels The NI-DAQmx driver returned an error. By using a comma or colon in , you can retrieve more than one channel at a time. For more information refer to Channels.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Creates a to measure the frequency of a digital signal. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The edges between which to measure the frequency. The method to use to calculate the frequency of the signal. The length of time to measure the frequency of a digital signal when is . Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, the count register might roll over, resulting in an incorrect measurement. The value by which to divide the input signal, when is . The larger the , the more accurate the measurement. However, too large a value might cause the count register to roll over, resulting in an incorrect measurement. The units to use to return the measurement. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a to measure the period of a digital signal. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The edges between which to measure the period of the signal. The method to use to calculate the period of the signal. The length of time to measure the period of a digital signal when is . Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, the count register might roll over, resulting in an incorrect measurement. The value by which to divide the input signal, when is . The larger the , the more accurate the measurement. However, too large a value might cause the count register to roll over, resulting in an incorrect measurement. The units to use to return the measurement. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a to measure the width of a digital pulse. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The edge to begin measuring the pulse width. The value of determines whether to measure a high or low pulse. The units to use to return the measurement. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Gets the at the specified index in the collection. In Visual C#, this property is the indexer.

The index of the channel to get. The specified . The NI-DAQmx driver returned an error. Channels

Copies the collection to an array or a portion of an array. This operation is not supported for .

Destination array for the collection. The index in the target array at which you want to begin copying the collection to. This method always throws a .

Creates a that measures the amount of time between the rising or falling edge of one digital signal and the rising or falling edge of another digital signal. This method adds one channel to the .

The names of the counter to use to create the virtual channels. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The edge of the first signal to start each measurement. The edge of the first signal to stop each measurement. The units to use to return time or period measurements. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Creates a with the specified custom scale that measures the amount of time between the rising or falling edge of one digital signal and the rising or falling edge of another digital signal. This method adds one channel to the .

The names of the counter to use to create the virtual channels. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in units. The maximum value expected from the measurement, in units. The edge of the first signal to start each measurement. The edge of the first signal to stop each measurement. The name of the custom scale to apply to the local virtual channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Creates a that uses an angular encoder to measure angular position. This method adds one channel to the .

The names of the counters to use to create the virtual channels. You can pass a string that contains a list or range of counters to this input. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The count and interpretation of the pulses that the encoder generates on signal A and signal B. , , and are valid for quadrature encoders only. is valid only for two-pulse encoders. Whether to use z indexing for the channel. The value, in , to which to reset the measurement when signal Z is high, and signal A and signal B are at the states you specify with . The states that signal A and signal B must be at while signal Z is high for NI-DAQmx to reset the measurement. If the signal Z is never high while the signal A and signal B are high, for example, you must choose a phase other than . The number of pulses that the encoder generates per revolution. This value is the number of pulses on one of either the A signal or the B signal, not the total number of pulses on both the A and B signals. The starting angle of the encoder. This value is in the units that you specify in the parameter. The units to use to return angular position measurements from the channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. and decoding are more sensitive to smaller changes in position than encoding, with being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if vibration exists in the encoder or other noise exists in the signals. When signal Z goes high and how long it stays high varies from encoder to encoder. Refer to the documentation for the encoder to determine the timing of signal Z with respect to signal A and signal B. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Creates a with the specified custom scale that uses an angular encoder to measure angular position. This method adds one channel to the .

The names of the counters to use to create the virtual channels. You can pass a string that contains a list or range of counters to this input. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The count and interpretation of the pulses that the encoder generates on signal A and signal B. , , and are valid for quadrature encoders only. is valid only for two-pulse encoders. Whether to use z indexing for the channel. The value, in units, to which to reset the measurement when signal Z is high, and signal A and signal B are at the states you specify with . The states signal A and signal B must be at while signal Z is high for NI-DAQmx to reset the measurement. If the signal Z is never high while the signal A and signal B are high, for example, you must choose a phase other than . The number of pulses that the encoder generates per revolution. This value is the number of pulses on one of either the A signal or the B signal, not the total number of pulses on both the A and B signals. The starting angle of the encoder. This value is in units. The name of the custom scale to apply to the local virtual channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. and decoding are more sensitive to smaller changes in position than encoding, with being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if vibration exists in the encoder or other noise exists in the signals. When signal Z goes high and how long it stays high varies from encoder to encoder. Refer to the documentation for the encoder to determine the timing of signal Z with respect to signal A and signal B. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Creates a that uses a linear encoder to measure linear position. This method adds one channel to the .

The name of the counter to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The count and interpretation of the pulses that the encoder generates on signal A and signal B. , , and are valid for quadrature encoders only. Whether to use z indexing for the channel. The value, in , to which to reset the measurement when signal Z is high, and signal A and signal B are at the states you specify with . The states signal A and signal B must be at while signal Z is high for NI-DAQmx to reset the measurement. If the signal Z is never high while the signal A and signal B are high, for example, you must choose a phase other than . The distance measured for each pulse that the encoder generates. This value is in the units that you specify in the parameter. The position of the encoder when the measurement begins. This value is in the units that you specify in the parameter. The units to use to return linear position measurements from the channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. and decoding are more sensitive to smaller changes in position than encoding, with being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if vibration exists in the encoder or other noise exists in the signals. When signal Z goes high and how long it stays high varies from encoder to encoder. Refer to the documentation for the encoder to determine the timing of signal Z with respect to signal A and signal B. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Creates a with the specified custom scale that uses a linear encoder to measure linear position. This method adds one channel to the .

The name of the counter to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The count and interpretation of the pulses that the encoder generates on signal A and signal B. , , and are valid for quadrature encoders only. Whether to use z indexing for the channel. The value, in units, to which to reset the measurement when signal Z is high, and signal A and signal B are at the states you specify with . The states signal A and signal B must be at while signal Z is high for NI-DAQmx to reset the measurement. If the signal Z is never high while the signal A and signal B are high, for example, you must choose a phase other than . The distance measured for each pulse the encoder generates. This value is in units. The position of the encoder when the measurement begins. This value is in units. The name of the custom scale to apply to the local virtual channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. and decoding are more sensitive to smaller changes in position than encoding, with being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if vibration exists in the encoder or other noise exists in the signals. When signal Z goes high and how long it stays high varies from encoder to encoder. Refer to the documentation for the encoder to determine the timing of signal Z with respect to signal A and signal B. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. This method does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Creates a that uses a special purpose counter to take a timestamp and synchronize that counter to a GPS receiver. This method adds one channel to the .

The name of the counter to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The method to use to synchronize the counter to a GPS receiver. The units to use to return GPS timestamp measurements from the channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Creates a that uses a special purpose counter to take a timestamp and synchronize that counter to a GPS receiver. This method adds one channel to the .

The name of the counter to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The method to use to synchronize the counter to a GPS receiver. The name of the custom scale to use to return GPS timestamp measurements from the channel. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error. The newly created .

Creates a to measure digital pulses defined by frequency and duty cycle. This function adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the measurement. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a to measure digital pulses defined by the amount of time the pulse is at a high and low state. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . The units to use to return the measurement. With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a to measure digital pulses defined by the number of timebase ticks that the pulse is at the high and low states. This method adds one channel to the .

The newly created . The names of the counters to use to create the virtual channel. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The terminal to which you connect an external timebase. The minimum value expected from the measurement, in . The maximum value expected from the measurement, in . With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. This method creates a virtual channel for the physical channel name you specify. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates to duty cycle of a digital pulse.

The name of the counter to use to create virtual channels. The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to . The minimum frequency you expect to measure. The maximum frequency you expect to measure. Specifies between which edges to measure the frequency or period of the signal. The name of a custom scale to apply to the channel. The newly created . With the exception of devices that support multi-counter tasks, you can create only one at a time with this function because a task can contain only one . To read from multiple counters simultaneously, use a separate task for each counter. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver returned an error.

Creates a channel that uses a linear encoder to measure linear velocity.

With the exception of devices that support multi-counter tasks, you create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal. The name of the counter to use to create virtual channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels. The minimum value, in units, that you expect to measure. The maximum value, in units, that you expect to measure. The distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units specified with the units input. Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. The name of a custom scale to apply to the channel.

Creates a channel that uses a linear encoder to measure linear velocity.

With the exception of devices that support multi-counter tasks, you create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal. The name of the counter to use to create virtual channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels. The minimum value, in units, that you expect to measure. The maximum value, in units, that you expect to measure. The distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units specified with the units input. Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. Specifies in which unit to return velocity measurements from the channel.

Creates a channel to measure angular velocity.

With the exception of devices that support multi-counter tasks, you create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal. The name of the counter to use to create virtual channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels. The minimum value, in units, that you expect to measure. The maximum value, in units, that you expect to measure. The number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B. Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. The name of a custom scale to apply to the channel.

Creates a channel to measure angular velocity.

The name of the counter to use to create virtual channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels. The minimum value, in units, that you expect to measure. The maximum value, in units, that you expect to measure. The number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B. Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. The name of a custom scale to apply to the channel.

Creates a channel to measure angular velocity.

With the exception of devices that support multi-counter tasks, you create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal. The name of the counter to use to create virtual channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels. The minimum value, in units, that you expect to measure. The maximum value, in units, that you expect to measure. The number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B. Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. Specifies in which unit to return velocity measurements from the channel.

Creates a channel to measure angular velocity.

With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal. The name of the counter to use to create virtual channels. The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for , use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels. The minimum value, in units, that you expect to measure. The maximum value, in units, that you expect to measure. The number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B. Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. Specifies in which unit to return velocity measurements from the channel.

Contains the collection of counter/timer output channels for a .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns an enumerator that you can use to iterate through the collection.

Enumerator for the collection. For a detailed explanation of this method, refer to in the Microsoft .NET Framework documentation. The NI-DAQmx driver returned an error.

Creates a to generate digital pulses defined by frequency and duty cycle. This method adds one or more channels to the .

The names of the counters to use to create the virtual channel. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The units to use to define pulse frequency. The resting state of the output terminal. The amount of time in seconds to wait before generating the first pulse. The frequency at which to generate the pulse. The width of the pulse divided by pulse period. NI-DAQmx uses this ratio, combined with frequency, to determine both pulse width and the interval between pulses. The newly created . When you use this method, the pulses appear on the default output terminal of the counter unless you select a different output terminal. This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a to generate digital pulses defined by the amount of time that the pulse is at the high and low states. This method adds one or more channels to the .

The names of the counters to use to create the virtual channel. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The units to use to define pulse high and low time. The resting state of the output terminal. The amount of time in seconds to wait before generating the first pulse. The amount of time that the pulse is low. The amount of time that the pulse is high. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Creates a to generate digital pulses defined by the number of timebase ticks that the pulse is at the high and low states. This method adds one or more channels to the .

The names of the counters to use to create the virtual channel. One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to . The terminal to which you connect an external timebase. The resting state of the output terminal. The number of timebase ticks to wait before generating the first pulse. Specify the terminal name. The number of timebase ticks that the pulse is low. The number of timebase ticks that the pulse is high. The newly created . This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for . If you provide fewer local virtual channel names in than you create, NI-DAQmx automatically assigns names to the local virtual channels. If you do not provide a value for , NI-DAQmx uses the as the local virtual channel name. If you use to create a name for the local virtual channel, you must use this name in other properties and methods. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Gets the number of elements in the collection.

The number of elements contained in the collection. The NI-DAQmx driver returned an error.

Gets a that operates on all of the channels in the task.

A that operates on all of the channels in a task. The NI-DAQmx driver returned an error.

Gets the with the specified virtual channel name. In Visual C#, this property is the indexer.

One or more virtual channel names that the retrieved operates on. The specified . Channels The NI-DAQmx driver returned an error. By using a comma or colon in , you can retrieve more than one channel at a time. For more information refer to Channels.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the at the specified index. In Visual C#, this property is the indexer.

The zero-based index of the entry to locate in the collection. The at the specified index. The NI-DAQmx driver returned an error. Channels

Copies the collection to an array or a portion of an array. This operation is not supported for .

Destination array for the collection. The index in the target array at which you want to begin copying the collection to. This method always throws a .

Specifies the direction of the conversion the provided polynomial coefficients perform.

The provided coefficients are the coefficients of the reverse polynomial.

The provided coefficients are the coefficients of the forward polynomial.

Contains methods that read unscaled samples from a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to read from the specified .

The to read. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for readers to access the samples generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Reads one or more unscaled 16-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of unscaled 16-bit integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Reads one or more unscaled 16-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of unscaled 16-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more unscaled 16-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of unscaled 16-bit integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more unscaled 16-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of unscaled 16-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Reads one or more unscaled 32-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of unscaled 32-bit integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Reads one or more unscaled 32-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of unscaled 32-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more unscaled 32-bit integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of unscaled 32-bit integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more unscaled 32-bit unsigned integer samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of unscaled 32-bit unsigned integer samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from that channel. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Contains methods that write unscaled samples to a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to write to the specified .

The to write to. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for writers to provide samples to be generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Writes one or more unscaled 16-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more unscaled 16-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of one or more unscaled 16-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more unscaled 16-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous write initiated with .

An that represents an asynchronous call started by calling . If you call before the asynchronous write represented by the provided is complete, waits for the write to complete before returning. For a write to a buffered task, the write is considered complete when all of the written samples have been transferred to the task buffer. Use or on the object to determine if a task has generated all of the data it was configured to generate. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. The data provided to had a non-zero lower bound. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries.

Writes one or more unscaled 32-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more unscaled 32-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. If the task uses on-demand timing, this method returns only after the device generates all samples. If the task uses any timing type other than on-demand, this method returns immediately and does not wait for the device to generate all samples. Your application must call the method to block until the device has generated all samples. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of one or more unscaled 32-bit unsigned integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more unscaled 32-bit integer samples to one or more objects in a task.

If set to this method automatically calls if you do not explicitly call it. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. The order of the lines in the array corresponds to the order in which you add the lines to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries.

Specifies the type of custom scale.

An array of raw values is mapped to an array of corresponding scaled values, with all other values scaled proportionally.

Values are scaled proportionally from a range of raw values to a range of scaled values.

Values are scaled by using an nth order polynomial equation.

Values are scaled linearly.

Specifies the name of the trigger, clock, or event to export.

Signal a counter generates. Each time the counter reaches terminal count, this signal toggles or pulses.

Signal an E Series device generates when the device latches analog input data (the ADC enters "hold" mode) and it is safe for any external switching hardware to remove the signal and replace it with the next signal. This event does not indicate the completion of the actual analog-to-digital conversion.

Signal a switch product generates after it both executes the command(s) in a scan list entry and waits for the settling time to elapse.

Output of an oscillator that is the onboard source of the Master Timebase. Other timebases are derived from this clock.

Clock that causes an analog-to-digital conversion on an E Series device. One conversion corresponds to a single sample from one channel.

Trigger that establishes the reference point between pretrigger and posttrigger samples.

Trigger that moves a switch to the next entry in a scan list.

Clock the device uses to time each sample.

Trigger that begins a measurement or generation.

The signal that a static DIO device generates when the watchdog timer expires.

The signal that a static DIO device generates when the device detects a rising or falling edge on any of the lines or ports you selected when you configured change detection timing.

Output of an oscillator that you can use to synchronize multiple devices.

Represents a handle to an external calibration session on a device.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples. Use to start an external calibration and create an instance of this class.

Releases all resources used by .

The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Adjusts the external calibration constants on an E Series device.

The known voltage to use as a reference for calibration. This voltage must be between +6.000 V and +9.999 V. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Closes an open external calibration session and saves the calibration changes made in the session.

The NI-DAQmx driver returned an error.

Adjusts the external calibration constants on an AO Series device.

The known voltage to use as a reference for calibration. This voltage must be between +6.000 V and +9.999 V. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for the baseboard of an SC Series device.

The known voltage to use as a reference for calibration. This voltage must be between +6.000 V and +9.999 V. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for the analog input section of a DSA device without shorting the input terminals.

The known voltage to use as a reference for calibration. This voltage must be between +4.9 V and +9.1 V. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for the timebase of a DSA device with an adjustible oscillator.

The frequency, in hertz, of the signal to use as a reference for calibration. You must connect a sinusoidal signal with a known frequency to the device and specify that frequency with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an S Series device.

The known voltage, in volts, to use as a reference for calibration. This voltage must be between +6.000 V and +9.999 V. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an M Series device.

The known voltage, in volts, to use as a reference for calibration. This voltage must be between +6.000 V and +9.999 V. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for the analog output section of a DSA device.

The number of the channel to calibrate. This number is the numeric portion of the physical channel name, not the full physical channel name. The low voltage you attempted to generate at the you specified. The actual low voltage as measured by an external sensor. The high voltage you attempted to generate at the you specified. The actual high voltage as measured by an external sensor. The gain setting you used when you attempted to generate the and . You must use the device to generate a high voltage and low voltage at a specified gain, measure the high and low voltages, then specify the requested high voltage, low voltage, and gain along with the actual high voltage and low voltage. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an NI 4204 device.

The physical channel(s) to calibrate. The lowpass filter cutoff frequency, in hertz, to calibrate. Specifies whether to calibrate the channel(s) with the sample and hold circuitry of the channel enabled. The known voltage, in volts, to use as a reference for calibration. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an NI 4220 device.

The physical channel(s) to calibrate. The gain setting to calibrate. The known voltage, in volts, to use as a reference for calibration. This device requires reference signals of 0.0 volts at gains of 1, 15, 20, and 310 on a particular channel in order to perform an offset calibration for that channel. If you do not manually supply those reference signals, the device measures them internally with sample and hold circuitry enabled. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an NI 4224 device.

The physical channel(s) to calibrate. The gain setting to calibrate. The known voltage, in volts, to use as a reference for calibration. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

The method has been deprecated. Adjusts the external calibration constants for an NI 4225 device.

The physical channel(s) to calibrate. The gain setting to calibrate. The known voltage, in volts, to use as a reference for calibration. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1102 module.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input/output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1102/B/C User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1102 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1125 module.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input/output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1125 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1125 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1520 module.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input/output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1520 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1520 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Configures the calibration task for an SCXI-1124 module.

The physical channel(s) to calibrate. The range of the calibration. The binary value to be written out to the specified channels DAC at the specified range. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an SCXI-1124 module.

A DMM measured reading of the output of the SCXI-1124 after the call. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1502 module.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input/output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector.

Adjusts the external calibration constants for an SCXI-1502 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1503 module.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input/output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector.

Adjusts the external calibration constants for an SCXI-1503 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an SCXI-1503 module.

Specifies the physical channel to calibrate. Specifies the current measured for the specified channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1124 module.

The physical channel(s) to calibrate. The range of the calibration. The binary value to be written out to the specified channels DAC at the specified range. The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1104 module.

The physical channel(s) to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input and output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1104 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1104 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1112 module.

The physical channel(s) to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input and output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1112 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1112 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the gain value for an SCXI-1530 or SCXI-1531 module calibration task.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input and output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1530/1531 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1530 or SCXI-1531 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the gain value for an SCXI-1540 module calibration task.

The physical channel(s) to calibrate. The excitation root mean square value. The excitation frequency. The NI-DAQmx driver returned an error. You can measure calibration input and output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1540 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1540 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. The calibration source. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the channel and range for an SCXI-1126 module calibration task.

The physical channel(s) to calibrate. The upper frequency limit. The NI-DAQmx driver returned an error. You can measure calibration input and output points by supplying reference signals to the specified channel and measuring the outputs. The terminal where you can measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1126 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1126 module.

The frequency, in Hertz, of the signal to use as a reference for calibration. The measured output, in volts, for the channel. The NI-DAQmx driver returned an error. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with .

Configures the gain value for an SCXI-1141 module calibration task.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input andoutput points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1141/1142/1143 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1141 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the gain value for an SCXI-1142 module calibration task.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input and output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1141/1142/1143 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1142 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the gain value for an SCXI-1143 module calibration task.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input and output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1141/1142/1143 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1143 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1122 module.

The physical channel(s) to calibrate. The gain setting to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input and output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1122 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1122 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Configures the calibration task for an SCXI-1521 module.

The physical channel(s) to calibrate. The NI-DAQmx driver returned an error. You can measure calibration input and output points by supplying reference signals to the specified channel and measuring the outputs. The terminal on which to measure module output depends on the configuration of the module in MAX. National Instruments recommends cabling the module to the digitizer so that the output appears on the MCH0± pins of the rear signal connector. Refer to the SCXI-1521 User Manual for more information on the routing of module output.

Adjusts the external calibration constants for an SCXI-1521 module.

The known voltage, in volts, to use as a reference for calibration. The measured output, in volts, for the channel. You must connect a known voltage to the module. You must specify the voltage with and specify the measured output with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for the analog input section of a DSA device. You can specify whether you want to short the input terminals or not.

The known voltage to use as a reference for calibration. This voltage must be between +4.9 V and +9.1 V. Specifies whether the input terminals are shorted for the calibration procedure. Refer to the calibration procedure for your device for more information. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an X Series device.

The known voltage, in volts, to use as a reference for calibration. This voltage must be between +6.000 V and +8.500 V. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Configures the calibration task for an NI PXIe-433x device.

The physical channel(s) to calibrate. The voltage value for calibration. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants on an NI PXIe-433x device.

The known voltage, in volts, to use as a reference for calibration. The known excitation value to use as a reference for calibration. Specifies the location of the shunted leg. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants on an NI 4300 device.

The known voltage, in volts, to use as a reference for calibration. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants on an NI 4353 device.

The physical channel(s) to calibrate. The known voltage, in volts, to use as a reference for calibration. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an NI 9223 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9225 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference current values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference current values.

Adjusts the external calibration constants for an NI 9227 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9229 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9233 device.

Specifies the physical channel(s) to calibrate. Specifies Specifies The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration gain constants for an NI 9234 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration offset constants for an NI 9234 device.

Specifies the physical channel(s) to calibrate. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9239 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be measured by a reference device.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of binary DAC codes that correspond to reference voltage values.

Writes the specified binary value to the DAC on the specified physical channel. This method requires a sweep of DAC values obtained from .

Specifies the name of the physical channel to use to create the virtual channel. The DAQmx physical channel constant lists all physical channels for devices installed in the system. You cannot specify more than one physical channel. The binary number to write to the DAC. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9263 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be measured by a reference device.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of binary DAC codes that correspond to reference voltage values.

Writes the specified binary value to the DAC on the specified physical channel. This method requires a sweep of DAC values obtained from .

Specifies the name of the physical channel to use to create the virtual channel. The DAQmx physical channel constant lists all physical channels for devices installed in the system. You cannot specify more than one physical channel. The binary number to write to the DAC. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9264 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference current values to be measured by a reference device.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of binary DAC codes that correspond to reference current values.

Writes the specified binary value to the DAC on the specified physical channel. This method requires a sweep of DAC values obtained from .

Specifies the name of the physical channel to use to create the virtual channel. The DAQmx physical channel constant lists all physical channels for devices installed in the system. You cannot specify more than one physical channel. The binary number to write to the DAC. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9265 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be measured by a reference device.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of binary DAC codes that correspond to reference voltage values.

Writes the specified binary value to the DAC on the specified physical channel. This method requires a sweep of DAC values obtained from .

Specifies the name of the physical channel to use to create the virtual channel. The DAQmx physical channel constant lists all physical channels for devices installed in the system. You cannot specify more than one physical channel. The binary number to write to the DAC. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9269 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Performs external calibration adjustment on a DSA device with the specified gain and coupling configuration.

The NI-DAQmx driver returned an error. Specifies the coupling setting to calibrate. Specifies, in decibels, the gain setting to calibrate. Specifies, in volts, the known voltage to use as a reference for calibration.

Specifies the temperature of a C Series device for the current external calibration session.

Specifies the temperature of the device, in degrees Celsius. The NI-DAQmx driver returned an error.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9201 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference current values to be used by a reference device to create a reference signal.

Specifies the minimum value for the range, in amps. Specifies the maximum value for the range, in amps. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference current values.

Adjusts the external calibration gain constants for an NI 9203 device.

Specifies the physical channel(s) to calibrate. Specifies the minimum value for the range, in amps. Specifies the maximum value for the range, in amps. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration offset constants for an NI 9203 device.

Specifies the physical channel(s) to calibrate. Specifies the minimum value for the range, in amps. Specifies the maximum value for the range, in amps. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9205 device.

Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9206 device.

Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage or current values to be used by a reference device to create a reference signal.

Specifies the physical channel(s) to calibrate. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage or current values.

Adjusts the external calibration gain constants for an NI 9207 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration offset constants for an NI 9207 device.

Specifies the physical channel(s) to calibrate. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference current values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference current values.

Adjusts the external calibration gain constants for an NI 9208 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration offset constants for an NI 9208 device.

Specifies the physical channel(s) to calibrate. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9211 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

Specifies the minimum value for the range, in volts. Specifies the maximum value for the range, in volts. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. Returns the reference voltage values.

Adjusts the external calibration constants for an NI 9213 device.

Specifies the physical channel(s) to calibrate. Specifies the minimum value for the range, in volts. Specifies the maximum value for the range, in volts. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

Specifies the physical channel(s) to calibrate. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9214 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9215 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference values.

Adjusts the external calibration constants for an NI 9217 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Sets up external calibration for an NI 9219 device.

Specifies the name of the physical channel to use to create the virtual channel. The DAQmx physical channel constant lists all physical channels for devices installed in the system. You cannot specify more than one physical channel. The minimum value in the range, in the units of the measurement type specified by . If your is RTD, you must specify your minimum range in ohms. The maximum value in the range, in the units of the measurement type specified by . If your is RTD, you must specify your maximum range in ohms. The type of measurement for the device. The type of Wheatstone bridge the sensor is. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference values.

Adjusts the external calibration constants for an NI 9219 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9221 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9222 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Configures a connection on the SC Express accessory for the specified physical channel(s).

The physical channel(s) to calibrate. Specifies how channels on the SC Express accessory should be configured. The resulting configuration connects channels to a particular external signal or to an onboard terminal. The supported connections depend on the accessory.

Disconnects the configured connection on an SC Express accessory and connects the accessory in the default configuration.

Configures an SC Express accessory to produce the bridge output specified in volts-per-volt.

The bridge output in volts-per-volt to be set on the SC Express accessory.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9232 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 4357 device.

Specifies the physical channel(s) to calibrate. Specifies in volts the known voltages to use as the references for calibration. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9220 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Configures the calibration task for an NI 4322 device.

The physical channel(s) to calibrate. The output type. The value for calibration. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants on an NI 4322 device.

The known voltage, in volts, to use as a reference for calibration. The name(s) of the physical channels to calibrate. You must connect a known voltage to the device and specify that voltage with . The NI-DAQmx driver returned an error.

Returns the reference values to be used by a reference device to create a reference signal.

The output type. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference values.

Adjusts the external calibration gain constants for an NI 4610.

Specifies the physical channel to calibrate. Specifies, in decibels, the gain setting to calibrate. Specifies the offset at which to begin a read operation. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for the timebase of a TIO device.

the timebase of a DSA device with an adjustable oscillator. You must connect a sinusoidal signal with a known frequency to the device and specify that frequency with referenceFrequency. You must connect a sinusoidal signal with a known frequency to the device. You cannot calibrate PXI-6608 devices with this function. Refer to KnowledgeBase 40KGCD2F for more information. The frequency, in hertz, of the signal to use as a reference for calibration.The NI-DAQmx driver returned an error.

Specifies the temperature of a DSA device for the current external calibration session.

The temperature of the device, in degrees Celsius. The NI-DAQmx driver returned an error.

Reads the specified value from the ADC on the specified physical channel. This method requires a sweep of DAC values obtained from .

Specifies the name of the physical channel(s) to calibrate. The DAQmx physical channel constant lists all physical channels for devices installed in the system. The binary number to read from the ADC. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Reads the specified value from the ADC on the specified physical channel. This method requires a sweep of DAC values obtained from .

Specifies the name of the physical channel to use to create the virtual channel. The DAQmx physical channel constant lists all physical channels for devices installed in the system. You cannot specify more than one physical channel. The binary number to read from the ADC. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Generates a sine wave of a fixed frequency from the DSA device. You must measure the frequency of the generated sine wave and pass that value into .

The NI-DAQmx driver returned an error. The expected frequency of the sine wave of a calibrated device. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for the timebase of a DSA device with an adjustible oscillator.

The measured frequency of the sine wave generated by the device. Returns if calibration of the device is complete. If this parameter returns , repeat the calibration process. You must first call and measure the frequency of the resulting sine wave. Repeat this process until returns . The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an NI 9242 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9244 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9218 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Sets up external calibration for an NI 9218 device.

The physical channels to calibrate. The minimum value in the range, in the units of the measurement type specified by . The maximum value in the range, in the units of the measurement type specified by . The type of measurement for the device. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference values.

Returns the reference values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference values.

Adjusts the external calibration constants for an NI 9238 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference values to be used by a reference device to create a reference signal.

Specifies the physical channel(s) to calibrate. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. Returns the reference voltage values.

Adjusts the external calibration constants for an NI 9212 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. The reference voltage values returned by this method.

Adjusts the external calibration constants for an NI 9216 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference values.

Adjusts the external calibration constants for an NI 9226 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for the analog output section of a NI 4463 device.

Specifies the physical channel(s) to calibrate. The known voltage, in volts, to use as a reference for calibration. You must connect a known voltage to the device and specify that voltage with the parameter.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. The reference voltage values returned by this method. The input terminal configuration for the channel. The gain setting to calibrate.

Generates a specified voltage from the DSA device.

The physical channel(s) to calibrate. The input terminal configuration of the device. The gain setting to calibrate. The output voltage to generate, in Hz. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration offset constants for an NI 9209 device.

Specifies the physical channel(s) to calibrate. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. Returns the reference voltage values.

Adjusts the external calibration constants for an NI 9230 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference values.

Returns the reference values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference values.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. The reference voltage values returned by this method.

Adjusts the external calibration gain constants for an NI 9209 device.

Specifies the physical channel(s) to calibrate. The input terminal configuration for the channel. Specifies the reference value measured using a calibrator. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Initializes an NI PXIe 4339 device with the specified mode, range, and exitation for calibration.

The physical channel(s) to calibrate. The minimum value in the range. The maximum value in the range. The voltage value for calibration. The calibration mode for the device. The NI-DAQmx driver returned an error.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI PXIe 4339 device.

The voltage across the AI+ and AI- terminals, measured using a DMM.

Adjusts the external calibration constants for an NI 4303. Connect a known voltage to the device and specify that voltage with .

Specifies, in volts, the known voltage to use as a reference for calibration. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an NI 4304. Connect a known voltage to the device and specify that voltage with .

Specifies, in volts, the known voltage to use as a reference for calibration. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an NI 4305. Connect a known voltage to the device and specify that voltage with .

Specifies, in volts, the known voltage to use as a reference for calibration. The NI-DAQmx driver returned an error.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Writes the specified binary value to the DAC on the specified physical channel. This modules requires a sweep of DAC values obtained from the .

The physical channel(s) to calibrate. The reference value measured using a calibrator. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an NI 9260 device.

The physical channel(s) to calibrate. The reference value measured using a calibrator. The NI-DAQmx driver returned an error.

Adjusts the external calibration constants for an NI 9246 device.

The physical channel(s) to calibrate. The reference value measured using a calibrator.

Adjusts the external calibration constants for an NI 9247 device.

The physical channel(s) to calibrate. The reference value measured using a calibrator.

Initializes an NI PXIe-4302 device with the specified range for calibration.

The physical channel(s) to calibrate. The minimum value in the range. The maximum value in the range. The NI-DAQmx driver returned an error.

Initializes an NI PXIe-4303 device with the specified range for calibration.

The physical channel(s) to calibrate. The minimum value in the range. The maximum value in the range. The NI-DAQmx driver returned an error.

Initializes an NI PXIe-4304 device with the specified range for calibration.

The physical channel(s) to calibrate. The minimum value in the range. The maximum value in the range. The NI-DAQmx driver returned an error.

Initializes an NI PXIe-4305 device with the specified range for calibration.

The physical channel(s) to calibrate. The minimum value in the range. The maximum value in the range. The NI-DAQmx driver returned an error.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 4302. Connect a known voltage to the device and specify that voltage with .

Specifies, in volts, the known voltage to use as a reference for calibration. The NI-DAQmx driver returned an error.

Returns the reference voltage values to be used by a reference device to create a reference signal.

The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device. A 1D array of reference voltage values.

Adjusts the external calibration constants for an NI 9251 device.

The physical channel(s) to calibrate. The reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9210 device.

Specifies the physical channel(s) to calibrate. Specifies the reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Generates a specified voltage from the DSA device.

The physical channel(s) to calibrate. The calibration mode for the device. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

A 1D array of reference voltage values. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9224 device.

The physical channel(s) to calibrate. The reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

A 1D array of reference voltage values. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9228 device.

The physical channel(s) to calibrate. The reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference voltage values to be used by a reference device to create a reference signal.

A 1D array of reference voltage values. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9250 device.

The physical channel(s) to calibrate. The reference value measured using a calibrator. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the external calibration constants for an NI 9775 device.

The physical channel(s) to calibrate. The reference value measured using a calibrator. The coupling of the calibration constants to be adjusted. For more information, see . The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Returns the reference values to be used by a reference device to create a reference signal.

The coupling of the calibration constants to be adjusted. For more information, see . A 1D array of reference values. The NI-DAQmx driver returned an error. Refer to the calibration procedure for your device for detailed calibration instructions. After you commit the calibration, you cannot undo it. If any calibration settings are incorrect, you must recalibrate the device.

Adjusts the calibration constants for a PXIe-4309 device.

The known voltage, in volts, to use as a reference for calibration. The NI-DAQmx driver returned an error. You must connect a known voltage to the device and specify that voltage with .

Adjusts the calibration constants for a PXIe-4310 device.

The known voltage, in volts, to use as a reference for calibration. The NI-DAQmx driver returned an error. You must connect a known voltage to the device and specify that voltage with .

Contains properties and methods that configure a trigger that arms the task for a start trigger. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Disables arm start triggering for the task.

The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures a task to arm for a start trigger upon a rising or falling edge of a digital signal.

The terminal of the trigger signal. The edge of the trigger signal that causes the task to arm to respond to a start trigger. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Gets the .

The .

Gets the .

The .

Gets the arm start trigger timestamp.

The arm start trigger timestamp. The NI-DAQmx driver returned an error. The timestamp returned is expressed as a UTC time. For more information on timestamps in NI-DAQmx, see Timestamps.

Specifies the type of trigger to use to arm the task for a Start Trigger. If you configure an Arm Start Trigger, the task does not respond to a Start Trigger until the device receives the Arm Start Trigger.

Specifies the type of trigger to use to arm the task for a Start Trigger. If you configure an Arm Start Trigger, the task does not respond to a Start Trigger until the device receives the Arm Start Trigger. The NI-DAQmx driver returned an error.

Indicates the name of the internal Arm Start Trigger terminal for the task. This property does not return the name of the trigger source terminal.

Indicates the name of the internal Arm Start Trigger terminal for the task. This property does not return the name of the trigger source terminal. The NI-DAQmx driver returned an error.

Specifies whether the arm start trigger timestamp is enabled. If the timestamp is enabled but no resources are available, an error will be returned at run time.

Specifies whether the arm start trigger timestamp is enabled. If the timestamp is enabled but no resources are available, an error will be returned at run time. The NI-DAQmx driver returned an error.

Specifies the arm start trigger timestamp timescale.

Specifies the arm start trigger timestamp timescale. The NI-DAQmx driver returned an error.

Contains properties to configure digital edgearm start triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a terminal where there is a digital signal to use as the source of the Arm Start Trigger.

Specifies the name of a terminal where there is a digital signal to use as the source of the Arm Start Trigger. The NI-DAQmx driver returned an error.

Specifies on which edge of a digital signal to arm the task for a Start Trigger.

Specifies on which edge of a digital signal to arm the task for a Start Trigger. The NI-DAQmx driver returned an error.

Specifies whether to apply the pulse width filter to the signal.

Specifies whether to apply the pulse width filter to the signal. The NI-DAQmx driver returned an error.

Specifies in seconds the minimum pulse width the filter recognizes.

Specifies in seconds the minimum pulse width the filter recognizes. The NI-DAQmx driver returned an error.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter.

Specifies the input terminal of the signal to use as the timebase of the pulse width filter. The NI-DAQmx driver returned an error.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter.

Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. The NI-DAQmx driver returned an error.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device.

Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. The NI-DAQmx driver returned an error. This property does not affect the minimum pulse width recognized by the device, but setting this property to does limit the speed at which the device recognizes transitions to less than the frequency of the internal timebase.

Contains properties and methods for configuring and controlling a watchdog timer.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Resets the internal timer to 0.

The NI-DAQmx driver returned an error. You must continually reset the internal timer to prevent it from timing out and locking out the device.

Unlocks the device after the watchdog timer has expired.

The NI-DAQmx driver returned an error.

Specifies in seconds the amount of time until the watchdog timer expires. A value of -1 means the internal timer never expires. Set this input to -1 if you use an Expiration Trigger to expire the watchdog task.

Specifies in seconds the amount of time until the watchdog timer expires. A value of -1 means the internal timer never expires. Set this input to -1 if you use an Expiration Trigger to expire the watchdog task. The NI-DAQmx driver returned an error.

Specifies the state to which to set the digital physical channels when the watchdog task expires. You cannot modify the expiration state of dedicated digital input physical channels.

The physical channel name for which to retrieve the setting. Refer to summary. The NI-DAQmx driver returned an error.

Specifies the state to which to set the digital physical channels when the watchdog task expires. You cannot modify the expiration state of dedicated digital input physical channels.

The physical channel name to which to apply . The setting to apply to the given physical channel. The NI-DAQmx driver returned an error.

Specifies the output type of the analog output physical channels when the watchdog task expires.

The physical channel name for which to retrieve the setting. Refer to summary. The NI-DAQmx driver returned an error.

Specifies the output type of the analog output physical channels when the watchdog task expires.

The physical channel name to which to apply . The setting to apply to the given physical channel. The NI-DAQmx driver returned an error.

Specifies the state to set the analog output physical channels when the watchdog task expires.

The physical channel name for which to retrieve the setting. Refer to summary. The NI-DAQmx driver returned an error.

Specifies the state to set the analog output physical channels when the watchdog task expires.

The physical channel name to which to apply . The setting to apply to the given physical channel. The NI-DAQmx driver returned an error.

Specifies the state to set the counter output channel terminal when the watchdog task expires.

The physical channel name for which to retrieve the setting. Refer to summary. The NI-DAQmx driver returned an error.

Specifies the state to set the counter output channel terminal when the watchdog task expires.

The physical channel name to which to apply . The setting to apply to the given physical channel. The NI-DAQmx driver returned an error.

Indicates if the watchdog timer expired. You can read this property only while the task is running.

Indicates if the watchdog timer expired. You can read this property only while the task is running. The NI-DAQmx driver returned an error.

Contains properties and methods that configure a trigger to cause the watchdog to expire in a watchdog timer task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Disables watchdog expiration triggering for the task.

The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures the watchdog timer to expire upon a rising or falling edge of a digital signal.

The terminal of the trigger signal. The edge of the trigger signal that causes a watchdog expiration trigger to occur. The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Gets the .

The .

Specifies the type of trigger to use to expire a watchdog task.

Specifies the type of trigger to use to expire a watchdog task. The NI-DAQmx driver returned an error.

Specifies the watchdog timer behavior when the network connection is lost between the host and the chassis. If set to true, the watchdog timer expires when the chassis detects the loss of network connection.

Specifies the watchdog timer behavior when the network connection is lost between the host and the chassis. If set to true, the watchdog timer expires when the chassis detects the loss of network connection. The NI-DAQmx driver returned an error.

Contains properties to configure digital edgewatchdog expiration triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the name of a terminal where a digital signal exists to use as the source of the Expiration Trigger.

Specifies the name of a terminal where a digital signal exists to use as the source of the Expiration Trigger. The NI-DAQmx driver returned an error.

Specifies on which edge of a digital signal to expire the watchdog task.

Specifies on which edge of a digital signal to expire the watchdog task. The NI-DAQmx driver returned an error.

Specifies the power up state to set for the physical channel.

High-impedance state. You can set this power up state only on devices with bidirectional ports, and you can set it only on entire ports. You cannot set this power up state on dedicated digital output lines.

Low logic.

High logic.

Encapsulates one or more channels on an NI-DAQmx device and contains functions and properties that operate on the channel outside the context of a task.

Use the method on the instance of to create an instance of this class for a physical channel on your system.Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Releases all resources used by .

The NI-DAQmx driver returned an error. Use this method only if the application you create runs on a low memory system.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the name of the physical channel.

A that represents the name of the physical channel. The NI-DAQmx driver returned an error.

Associates TEDS information with the physical channel you specify.

The path to a virtual TEDS file that you want to associate with the physical channel. If you specify for this parameter, this method attempts to find a TEDS sensor connected to the physical channel. The NI-DAQmx driver returned an error. This method temporarily overrides any TEDS configuration for the physical channel that you performed in Measurement Automation Explorer (MAX).

Removes TEDS information from the physical channel you specify.

The NI-DAQmx driver returned an error. This method temporarily overrides any TEDS configuration for the physical channel that you performed in Measurement Automation Explorer (MAX).

Associates TEDS information with the physical channel you specify, using a TEDS sensor connected to the physical channel.

The NI-DAQmx driver returned an error. This method temporarily overrides any TEDS configuration for the physical channel that you performed in Measurement Automation Explorer (MAX).

Write TEDS data from a array to a sensor on the physical channel you specify.

The bitstream to write to the sensor. This bitstream must be constructed according to the IEEE 1451.4 specification. A value that specifies how to handle basic TEDS data in the bitstream.

Write TEDS data from a virtual TEDS file to a sensor on the physical channel you specify.

The path to a virtual TEDS file that contains the bitstream to write to the sensor. A value that specifies how to handle basic TEDS data in the bitstream.

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Indicates the list of output terminal configurations supported by the channel.

A that indicates the terminal configurations supported by the channel. The value is a bitwise combination of , , , , and . The NI-DAQmx driver returned an error.

Indicates the list of input terminal configurations supported by the channel.

A that indicates the terminal configurations supported by the channel. The value is a bitwise combination of , , , , and . The NI-DAQmx driver returned an error.

Gets the measurement types supported by the physical channels of the device.

The values of the supported of the physical channel.

Gets the generation types supported by the physical channels of the device.

The values of the supported of the physical channel.

Gets the generation types supported by the physical channels of the device

The values of the supported of the physical channel.

Gets the measurement types supported by the physical channels of the device.

The values of the supported of the physical channel.

Gets the sample modes supported by the physical channels that support sample clocked digital input.

The values of the supported of the physical channel.

Gets the sample modes supported by physical channels that support sample clocked digital output.

The values of the supported of the physical channel.

Indicates the list of input sources supported by the channel. Channels may support using the signal from the I/O connector or one of several calibration signals.

Indicates the list of input sources supported by the channel. Channels may support using the signal from the I/O connector or one of several calibration signals. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies if you can control the physical channel externally via a manual control located on the device. You cannot simultaneously control a channel manually and with NI-DAQmx.

Specifies if you can control the physical channel externally via a manual control located on the device. You cannot simultaneously control a channel manually and with NI-DAQmx. The NI-DAQmx driver returned an error.

Indicates whether the physical channel is currently disabled due to a short detected on the channel.

Indicates whether the physical channel is currently disabled due to a short detected on the channel. The NI-DAQmx driver returned an error.

Indicates the current value of the front panel amplitude control for the physical channel in volts.

Indicates the current value of the front panel amplitude control for the physical channel in volts. The NI-DAQmx driver returned an error.

Indicates the current value of the front panel frequency control for the physical channel in hertz.

Indicates the current value of the front panel frequency control for the physical channel in hertz. The NI-DAQmx driver returned an error.

Specifies whether to enable or disable a channel for amplification. This property can also be used to check if a channel is enabled.

Specifies whether to enable or disable a channel for amplification. This property can also be used to check if a channel is enabled. The NI-DAQmx driver returned an error.

Indicates the coefficients of a polynomial equation used to scale from pre-amplified values.

Indicates the coefficients of a polynomial equation used to scale from pre-amplified values. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates if the channel detected an overcurrent condition.

Indicates if the channel detected an overcurrent condition. The NI-DAQmx driver returned an error.

Indicates the calibrated gain of the channel.

Indicates the calibrated gain of the channel. The NI-DAQmx driver returned an error.

Indicates the calibrated offset of the channel in volts.

Indicates the calibrated offset of the channel in volts. The NI-DAQmx driver returned an error.

Indicates in bits the width of digital input port.

Indicates in bits the width of digital input port. The NI-DAQmx driver returned an error.

Indicates if the sample clock timing type is supported for the digital input physical channel.

Indicates if the sample clock timing type is supported for the digital input physical channel. The NI-DAQmx driver returned an error.

Indicates if the change detection timing type is supported for the digital input physical channel.

Indicates if the change detection timing type is supported for the digital input physical channel. The NI-DAQmx driver returned an error.

Indicates in bits the width of digital output port.

Indicates in bits the width of digital output port. The NI-DAQmx driver returned an error.

Indicates if the sample clock timing type is supported for the digital output physical channel.

Indicates if the sample clock timing type is supported for the digital output physical channel. The NI-DAQmx driver returned an error.

Indicates the manufacturer ID of the sensor.

Indicates the manufacturer ID of the sensor. The NI-DAQmx driver returned an error.

Indicates the model number of the sensor.

Indicates the model number of the sensor. The NI-DAQmx driver returned an error.

Indicates the serial number of the sensor.

Indicates the serial number of the sensor. The NI-DAQmx driver returned an error.

Indicates the version number of the sensor.

Indicates the version number of the sensor. The NI-DAQmx driver returned an error.

Indicates the version letter of the sensor.

Indicates the version letter of the sensor. The NI-DAQmx driver returned an error.

Indicates the TEDS binary bitstream without checksums.

Indicates the TEDS binary bitstream without checksums. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Indicates the IDs of the templates in the bitstream in .

Indicates the IDs of the templates in the bitstream in . The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Encapsulates a counter output specified in terms of frequency and duty cycle.

Initializes a new instance of the object with the specified initial values.

The frequency of the pulse. The duty cycle of the pulse.

Gets or sets the frequency of the pulse.

The frequency of the pulse.

Gets or sets the duty cycle of the pulse.

The duty cycle of the pulse.

Returns a value indicating if this instance is equal to the specified object.

An object to compare with this instance. if is a object that has the same frequency and duty cycle as this instance.

Returns a value indicating if this instance is equal to the specified object.

A to compare with this instance. if has the same frequency and duty cycle as this instance.

Returns a value indicating if two specified instances of are equal.

A object. A object. if and are equal.

Returns a hash code for the object.

A 32-bit signed integer hash code. Two objects might have the same hash code even though they represent different values.

Returns true if two objects are equal.

A object. A object. if the values of and are equal.

Returns true if two objects are not equal.

A object. A object. if the values of and are not equal.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Encapsulates a counter output specified in terms of time.

Initializes a new instance of the object with the specified initial values.

The amount of time the pulse is low. The amount of time the pulse is high.

Gets or sets the amount of time the pulse is low.

The amount of time the pulse is low.

Gets or sets the amount of time the pulse is high.

The amount of time the pulse is high.

Returns a value indicating if this instance is equal to the specified object.

An object to compare with this instance. if is a object that has the same low time and high time as this instance.

Returns a value indicating if this instance is equal to the specified object.

A object to compare with this instance. if has the same low time and high time as this instance.

Returns a value indicating if two specified instances of are equal.

A object. A object. if and are equal.

Returns a hash code for the object.

A 32-bit signed integer hash code. Two objects might have the same hash code even though they represent different values.

Returns true if two objects are equal.

A object. A object. if the values of and are equal.

Returns true if two objects are not equal.

A object. A object. if the values of and are not equal.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Contains methods for writing samples to a single counter output channel in a counter output task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Initializes a new instance of the class to write to the specified .

The to write to. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for the writer classes to provide samples to be generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Writes a time sample to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error.

Writes a frequency sample to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error.

Begins an asynchronous write of a time sample to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a frequency sample to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous write initiated with any of the counter asynchronous write methods, such as .

An that represents an asynchronous call started by calling any of the counter asynchronous write methods, such as . If you call before the asynchronous write represented by the provided is complete, waits for the write to complete before returning. For a write to a buffered task, the write is considered complete when all of the written samples have been transferred to the task buffer. Use or on the object to determine if a task has generated all of the data that it was configured to generate. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to one of the counter asynchronous write methods, such as . The NI-DAQmx driver returned an error during the asynchronous operation. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Writes a ticks sample to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error.

Begins an asynchronous write of a ticks sample to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A sample to write to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Writes one or more ticks samples to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error.

Writes one or more time samples to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error.

Writes one or more frequency samples to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error.

Begins an asynchronous write of one or more ticks samples to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more time samples to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more frequency samples to a single in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a sample to write to the channel. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Contains methods for writing samples to one or more counter output channels in a counter output task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Initializes a new instance of the class to write to the specified .

The to write to. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for the writer classes to provide samples to be generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Writes a single time sample to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes a single frequency sample to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of a single time sample to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of a single frequency sample to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous write initiated with any of the counter asynchronous write methods, such as .

An that represents an asynchronous call started by calling any of the counter asynchronous write methods, such as . If you call before the asynchronous write represented by the provided is complete, waits for the write to complete before returning. For a write to a buffered task, the write is considered complete when all of the written samples have been transferred to the task buffer. Use or on the object to determine if a task has generated all of the data that it was configured to generate. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to one of the counter asynchronous write methods, such as . The NI-DAQmx driver returned an error during the asynchronous operation. The data provided to one of the counter asynchronous write methods, such as , had a non-zero lower bound. Asynchronous Reads and Writes

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Writes a single ticks sample to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of a single ticks sample to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 1D array of samples to write to the task. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Writes one or more ticks samples to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes one or more time samples to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Writes a single frequency samples to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. has a non-zero lower bound.

Begins an asynchronous write of one or more ticks samples to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more time samples to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Begins an asynchronous write of one or more frequency samples to one or more objects in a counter output task.

If set to this method automatically calls if you do not explicitly call it. You cannot set this parameter to if you have installed events on the task. A 2D array of samples to write to the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample to write to each channel. The order of the channels in the array corresponds to the order in which you add the channels to the task. An optional asynchronous callback that is called when the write is complete. Specify if you do not want a callback when the write is complete. A user-provided object that distinguishes this asynchronous write request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. Pass the returned to to get any exceptions that occurred during the asynchronous write or to wait for the write to complete. NI-DAQmx scales the generated data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Encapsulates a counter output specified in terms of timebase ticks.

Initializes a new instance of the object with the specified initial values.

The number of timebase ticks the pulse is low. The number of timebase ticks the pulse is high.

Initializes a new instance of the object with the specified unsigned initial values.

The number of timebase ticks the pulse is low. The number of timebase ticks the pulse is high.

Gets or sets the number of timebase ticks the pulse is low.

The number of timebase ticks the pulse is low.

Gets or sets the number of timebase ticks the pulse is high.

The number of timebase ticks the pulse is high.

Gets or sets the number of timebase ticks the pulse is low.

The number of timebase ticks the pulse is low.

Gets or sets the number of timebase ticks the pulse is high.

The number of timebase ticks the pulse is high.

Returns a value indicating if this instance is equal to the specified object.

An object to compare with this instance. if is a object that has the same low ticks and high ticks as this instance.

Returns a value indicating if this instance is equal to the specified object.

A object to compare with this instance. if has the same low ticks and high ticks as this instance.

Returns a value indicating if two specified instances of are equal.

A object. A object. if and are equal.

Returns a hash code for the object.

A 32-bit signed integer hash code. Two objects might have the same hash code even though they represent different values.

Returns true if two objects are equal.

A object. A object. if the values of and are equal.

Returns true if two objects are not equal.

A object. A object. if the values of and are not equal.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Specifies the types of physical channels to include when requesting a list of physical channels.

All types of physical channels.

Digital output ports.

Digital output lines.

Digital input ports.

Digital input lines.

Counter outputs.

Counter inputs.

Analog outputs.

Analog inputs.

Specifies the physical channel access types to include when requesting a list of physical channels.

Both internal and external channels.

Physical channels internal to the device.

Physical channels with an external connector on the device.

Specifies the types of terminals to include when requesting a list of terminals.

Both basic and advanced terminals.

Terminals that are often internal to a device or terminals rarely used in typical measurement applications.

Terminals commonly used in typical measurement applications.

Specifies how to handle basic TEDS data in a TEDS bitstream.

Basic TEDS data is ignored.

Basic TEDS data is written to the PROM. Any subsequent attempts to write basic TEDS data results in an error.

Basic TEDS data is written to the EEPROM, even if the sensor includes a PROM. You cannot write basic TEDS data if the PROM contains data.

Contains properties that let a task start acquiring or generating samples when a digital pattern is matched.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the physical channels to use for pattern matching. The order of the physical channels determines the order of the pattern. If a port is included, the order of the physical channels within the port is in ascending order.

Specifies the physical channels to use for pattern matching. The order of the physical channels determines the order of the pattern. If a port is included, the order of the physical channels within the port is in ascending order. The NI-DAQmx driver returned an error.

Specifies the digital pattern that must be met for the Start Trigger to occur.

Specifies the digital pattern that must be met for the Start Trigger to occur. The NI-DAQmx driver returned an error.

Specifies whether the Start Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with .

Specifies whether the Start Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with . The NI-DAQmx driver returned an error.

Contains properties that let a task stop the acquisition when the device acquires all pretrigger samples, matches a digital pattern, and acquires all posttrigger samples.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the physical channels to use for pattern matching. The order of the physical channels determines the order of the pattern. If a port is included, the order of the physical channels within the port is in ascending order.

Specifies the physical channels to use for pattern matching. The order of the physical channels determines the order of the pattern. If a port is included, the order of the physical channels within the port is in ascending order. The NI-DAQmx driver returned an error.

Specifies the digital pattern that must be met for the Reference Trigger to occur.

Specifies the digital pattern that must be met for the Reference Trigger to occur. The NI-DAQmx driver returned an error.

Specifies whether the Reference Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with .

Specifies whether the Reference Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with . The NI-DAQmx driver returned an error.

Contains properties and methods that configure handshake trigger signals on a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Disables handshake triggering for the measurement.

The NI-DAQmx driver returned an error. The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with .

Configures the task to stop the acquisition when the device acquires all pretrigger samples; an analog signal reaches the level you specify; and the device acquires all post-trigger samples.

The name of a virtual channel or terminal where there is an analog signal to use as the source of the trigger. For E Series devices, if you use a virtual channel, it must be the only channel in the task. The only terminal you can use for E Series devices is PFI0. The value of the desired . The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a are valid, you must verify the task by starting the task, either with or by reading from or writing to the task, or by calling with . The NI-DAQmx driver returned an error.

Gets the .

The .

Specifies the type of Handshake Trigger to use.

Specifies the type of Handshake Trigger to use. The NI-DAQmx driver returned an error.

Contains properties to configure interlocked handshake triggers. For more information, refer to .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the source terminal of the Handshake Trigger.

Specifies the source terminal of the Handshake Trigger. The NI-DAQmx driver returned an error.

Specifies the asserted level of the Handshake Trigger.

Specifies the asserted level of the Handshake Trigger. The NI-DAQmx driver returned an error.

Encapsulates information about a task stored in Measurement Automation Explorer (MAX). You can retrieve an instance of this class by calling .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Releases all resources used by .

The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the name of the task.

A that represents the name of the task. The NI-DAQmx driver returned an error.

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Indicates the author of the task.

Indicates the author of the task. The NI-DAQmx driver returned an error.

Indicates whether the task can be edited in the DAQ Assistant.

Indicates whether the task can be edited in the DAQ Assistant. The NI-DAQmx driver returned an error.

Indicates whether the task can be deleted through MAX.

Indicates whether the task can be deleted through MAX. The NI-DAQmx driver returned an error.

Encapsulates information about a global channel stored in Measurement Automation Explorer (MAX). You can retrieve an instance of this class by calling .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Releases all resources used by .

The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the name of the channel.

A that represents the name of the channel. The NI-DAQmx driver returned an error.

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Indicates the author of the global channel.

Indicates the author of the global channel. The NI-DAQmx driver returned an error.

Indicates whether the global channel can be edited in the DAQ Assistant.

Indicates whether the global channel can be edited in the DAQ Assistant. The NI-DAQmx driver returned an error.

Indicates whether the global channel can be deleted through MAX.

Indicates whether the global channel can be deleted through MAX. The NI-DAQmx driver returned an error.

Encapsulates information about a custom scale stored in Measurement Automation Explorer (MAX). You can retrieve an instance of this class by calling .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Releases all resources used by .

The NI-DAQmx driver returned an error.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Gets the name of the scale.

A that represents the name of the scale. The NI-DAQmx driver returned an error.

Releases the managed and unmanaged resources used by or optionally releases only the unmanaged resources.

to release both managed and unmanaged resources used by ; to release only unmanaged resources used by . Refer to Cleaning Up Unmanaged Resources for more information on implementing a Dispose method and using objects that implement .

Indicates the author of the custom scale.

Indicates the author of the custom scale. The NI-DAQmx driver returned an error.

Indicates whether the custom scale can be edited in the DAQ Assistant.

Indicates whether the custom scale can be edited in the DAQ Assistant. The NI-DAQmx driver returned an error.

Indicates whether the custom scale can be deleted through MAX.

Indicates whether the custom scale can be deleted through MAX. The NI-DAQmx driver returned an error.

Specifies various options used to save a task, a local or global channel , or a custom scale to Measurement Automation Explorer (MAX).

You can specify multiple options by using bitwise or combining individual values.

The and options are enabled.

If a saved object already exists in Measurement Automation Explorer (MAX) with the same name as the new object, the new object overwrites the old object.

The saved object may be deleted through an interactive tool, such as Measurement Automation Explorer (MAX).

The saved object may be edited through an interactive tool, such as Measurement Automation Explorer (MAX).

All options are enabled.

No options are enabled.

Defines the interface that is implemented by all subobjects that can perform property filtering by programmatically returning an that contains the list of filtered properties for the subobject.

The following subobjects currently implement this interface: Visit the DAQmx Professional Developer Tools Web site for more information and examples of programmatically determining device capabilities.

Returns a list of filtered properties that belong to the subobject, according to the specified filtering type and filter flags.

The type of filtering to perform. The filtering options. An that contains the filtered properties. Property filtering is a mechanism whereby you can programmatically retrieve a list of properties that are applicable to a specific task's subobject, based on the filtering type. You can call the method on the returned in order to access the list of properties as a . When is called with an attribute array as a filter, the returned properties are filtered as if they all have the set to . An invalid enumeration value was passed as an argument to the function. The NI-DAQmx driver returned an error.

Returns a list of filtered properties that belong to the subobject, according to the specified filtering type.

The type of filtering to perform. An that contains the filtered properties. Property filtering is a mechanism whereby you can programmatically retrieve a list of properties that are applicable to a specific task's subobject, based on the filtering type. You can call the method on the returned in order to access the list of properties as a . When is called with an attribute array as a filter, the returned properties are filtered as if they all have the set to . An invalid enumeration value was passed as an argument to the function. The NI-DAQmx driver returned an error.

Represents the method that handles the event.

The that caused this event. A that contains the event data.

Provides data for the event.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Gets the that occurred, if any.

If the task stopped due to an error, an is returned that represents the particular error. If the task did not stop due to an error, this value is . As an alternative to checking this property, you can call the method.

Initializes a new instance of the class with the specified exception.

The that explains why the task stopped, or if the task completed successfully.

Throws the that occurred, if any exists.

If the task stopped due to an error, an is thrown that represents the particular error. If the task did not stop due to an error, the method returns. As an alternative to calling this method, you can check the property.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Exposes a buffer on a that can be used to read or write samples to or from an NI-DAQmx task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the number of samples the input buffer can hold for each channel in the task. Zero indicates to allocate no buffer. Use a buffer size of 0 to perform a hardware-timed operation without using a buffer. Setting this property overrides the automatic input buffer allocation that NI-DAQmx performs.

Specifies the number of samples the input buffer can hold for each channel in the task. Zero indicates to allocate no buffer. Use a buffer size of 0 to perform a hardware-timed operation without using a buffer. Setting this property overrides the automatic input buffer allocation that NI-DAQmx performs. The NI-DAQmx driver returned an error.

Indicates in samples per channel the size of the onboard input buffer of the device.

Indicates in samples per channel the size of the onboard input buffer of the device. The NI-DAQmx driver returned an error.

Specifies the number of samples the output buffer can hold for each channel in the task. Zero indicates to allocate no buffer. Use a buffer size of 0 to perform a hardware-timed operation without using a buffer. Setting this property overrides the automatic output buffer allocation that NI-DAQmx performs.

Specifies the number of samples the output buffer can hold for each channel in the task. Zero indicates to allocate no buffer. Use a buffer size of 0 to perform a hardware-timed operation without using a buffer. Setting this property overrides the automatic output buffer allocation that NI-DAQmx performs. The NI-DAQmx driver returned an error.

Specifies in samples per channel the size of the onboard output buffer of the device.

Specifies in samples per channel the size of the onboard output buffer of the device. The NI-DAQmx driver returned an error.

Contains properties and methods that configure how to align to the sample clock of the .

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Waits until the next pulse of the sample clock occurs.

The maximum amount of time, in seconds, to wait for the next sample clock pulse. If the time elapses, this method returns an error. If you set timeout to -1, this method waits indefinitely. Specifies whether the next sample clock is late. The NI-DAQmx driver returned an error. If an extra sample clock pulse occurs between calls to this method, the second call returns an error or warning and waits for the next sample clock pulse. Use the property to specify whether this method returns errors or warnings. Use this method to ensure I/O cycles complete within sample clock periods. National Instruments recommends you use this method for certain applications only.

Waits until the next pulse of the sample clock occurs, with a timeout value of 10 seconds.

Specifies whether the next sample clock is late. The NI-DAQmx driver returned an error. If an extra sample clock pulse occurs between calls to this method, the second call returns an error or warning and waits for the next sample clock pulse. Use the property to specify whether this method returns errors or warnings. Use this method to ensure I/O cycles complete within sample clock periods. National Instruments recommends you use this method for certain applications only.

Specifies if , reading from the task, and writing to the task convert late errors to warnings. NI-DAQmx returns no late warnings or errors until the number of warmup iterations you specify with execute.

Specifies if , reading from the task, and writing to the task convert late errors to warnings. NI-DAQmx returns no late warnings or errors until the number of warmup iterations you specify with execute. The NI-DAQmx driver returned an error.

Specifies the number of loop iterations that must occur before and reading from the task return any late warnings or errors. The system needs a number of iterations to stabilize. During this period, a large amount of jitter occurs, potentially causing reads and writes to be late. The default number of warmup iterations is 100. Specify a larger number if needed to stabilize the system.

Specifies the number of loop iterations that must occur before and reading from the task return any late warnings or errors. The system needs a number of iterations to stabilize. During this period, a large amount of jitter occurs, potentially causing reads and writes to be late. The default number of warmup iterations is 100. Specify a larger number if needed to stabilize the system. The NI-DAQmx driver returned an error.

Specifies how waits for the next Sample Clock pulse.

Specifies how waits for the next Sample Clock pulse. The NI-DAQmx driver returned an error.

Specifies whether reading from the task returns lateness errors or warnings when it detects missed Sample Clock pulses. This setting does not affect . Set this property to for applications that need to detect lateness without using .

Specifies whether reading from the task returns lateness errors or warnings when it detects missed Sample Clock pulses. This setting does not affect . Set this property to for applications that need to detect lateness without using . The NI-DAQmx driver returned an error.

Specifies how NI-DAQmx attempts to recover after missing a Sample Clock pulse when performing counter writes.

Specifies how NI-DAQmx attempts to recover after missing a Sample Clock pulse when performing counter writes. The NI-DAQmx driver returned an error.

Specifies the type of property filtering to perform.

Returns only the properties that apply to the devices being used in the task and belong to the subobject.

Returns only the properties that apply to the configured devices on the system and belong to the subobject.

Returns all of the properties that belong to the subobject.

Specifies a set of property filtering options.

The property filtering only returns properties that can be modified by the DAQmx driver while the task is running.

No additional filtering options.

Represents the method that handles the event.

The that caused this event. A that contains the event data.

Represents the method that handles the event.

The that caused this event. A that contains the event data.

Represents the method that handles the event.

The that caused this event. A that contains the event data.

Represents the method that handles the event.

The that caused this event. A that contains the event data.

Provides data for the event.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Initializes a new instance of the class.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Provides data for the event.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Initializes a new instance of the class.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Provides data for the event.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Initializes a new instance of the class.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Provides data for the event.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Initializes a new instance of the class.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Specifies the type of information returned from waveform reads.

The value of this property may affect performance when performing waveform reads.

Returns timing information in addition to the waveform data. This value may degrade performance when performing waveform reads.

Returns extended properties in addition to the waveform data. This value may degrade performance when performing waveform reads.

Returns only the waveform data itself, with no timing information or extended properties. Use this value for optimal performance.

Contains properties that let a task pause the acquisition or generation when the device matches a digital pattern.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies the physical channels to use for pattern matching. The order of the physical channels determines the order of the pattern. If a port is included, the lines within the port are in ascending order.

Specifies the physical channels to use for pattern matching. The order of the physical channels determines the order of the pattern. If a port is included, the lines within the port are in ascending order. The NI-DAQmx driver returned an error.

Specifies the digital pattern that must be met for the Pause Trigger to occur.

Specifies the digital pattern that must be met for the Pause Trigger to occur. The NI-DAQmx driver returned an error.

Specifies if the Pause Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with .

Specifies if the Pause Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with . The NI-DAQmx driver returned an error.

Specifies the range for the SCXI 1124 calibration values.

Range is from 0 mA to 20 mA.

Range is from -10 volts to 10 volts.

Range is from -5 volts to 5 volts.

Range is from -1 volt to 1 volt.

Range is from 0 volts to 10 volts.

Range is from 0 volts to 5 volts.

Range is from 0 volts to 1 volt.

Specifies a set of trigger types a device may support.

Specifies a set of trigger types a device may support.

Device supports arm start triggers.

Device supports handshake triggers.

Device supports reference triggers.

Device supports pause triggers.

Device supports advance triggers.

Device supports no trigger types.

Device supports start triggers.

Specifies the logic family to use for generation and acquisition.

A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to device documentation for information on the logic high and logic low voltages for these logic families.

Compatible with TTL and CMOS signals.

Compatible with LVTTL and LVCMOS signals.

Compatible with CMOS signals.

Specifies a set of coupling types a device may support.

Specifies a set of coupling types a device may support.

Remove the signal from the measurement and measure only ground.

Allow NI-DAQmx to measure all of the signal.

Remove the DC offset from the signal.

No coupling types supported by the device.

Specifies a set of terminal configuration types a physical channel may support.

Specifies a set of terminal configuration types a physical channel may support.

Pseudodifferential.

Differential.

Non-Referenced Single-Ended.

Referenced Single-Ended.

Physical channel does not support any terminal configuration types.

Specifies how the device responds to the sample clock and to triggers.

Device responds by the next sample clock edge.

Device acquires or generates samples on the next sample clock edge, but does not respond to certain triggers until a few sample clock edges later. Refer to device documentation for information about which triggers the multicycle response mode affects. This response mode allows higher data transfer rates at the cost of increased latency for responding to triggers.

Specifies the input source selection.

Connect the channel to ground.

Loopback the internal excitation voltage with 180 degree phase shift.

Loopback the internal excitation voltage with 0 degree phase shift.

Specifies which resistor to use to calibrate the channel(s).

No resistor.

Resistor 4.

Resistor 3.

Resistor 2.

Resistor 1.

Encapsulates a counter input specified in terms of frequency and duty cycle.

Initializes a new instance of the object with the specified frequency and duty cycle.

The frequency of the pulse. The duty cycle of the pulse.

Returns if two objects are equal.

A object. A object. if the values of and are equal.

Returns if two objects are not equal.

A object. A object. if the values of and are not equal.

Returns a value indicating if this instance is equal to the specified object.

A to compare with this instance. if has the same frequency and duty cycle as this instance.

Returns a value indicating if this instance is equal to the specified object.

An object to compare with this instance. if is a object that has the same frequency and duty cycle as this instance.

Returns a value indicating if two specified instances of are equal.

A object. A object. if and are equal.

Returns a hash code for the object.

A 32-bit signed integer hash code. Two objects might have the same hash code even though they represent different values.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Gets or sets the frequency of the pulse.

The frequency of the pulse.

Gets or sets the duty cycle of the pulse.

The duty cycle of the pulse.

Encapsulates a counter input specified in terms of timebase ticks.

Initializes a new instance of the object with the specified initial values.

The number of timebase ticks the pulse is low. The number of timebase ticks the pulse is high.

Initializes a new instance of the object with the specified unsigned initial values.

The number of timebase ticks the pulse is low. The number of timebase ticks the pulse is high.

Returns if two objects are equal.

A object. A object. if the values of and are equal.

Returns if two objects are not equal.

A object. A object. if the values of and are not equal.

Returns a value indicating if this instance is equal to the specified object.

A object to compare with this instance. if has the same low ticks and high ticks as this instance.

Returns a value indicating if this instance is equal to the specified object.

An object to compare with this instance. if is a object that has the same low ticks and high ticks as this instance.

Returns a value indicating if two specified instances of are equal.

A object. A object. if and are equal.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Returns a hash code for the object.

A 32-bit signed integer hash code. Two objects might have the same hash code even though they represent different values.

Gets or sets the number of timebase ticks the pulse is low.

The number of timebase ticks the pulse is low.

Gets or sets the number of timebase ticks the pulse is high.

The number of timebase ticks the pulse is high.

Gets or sets the number of timebase ticks the pulse is low.

The number of timebase ticks the pulse is low.

Gets or sets the number of timebase ticks the pulse is high.

The number of timebase ticks the pulse is high.

Encapsulates a counter input specified in terms of time.

Initializes a new instance of the object with the specified time.

The amount of time the pulse is low. The amount of time the pulse is high.

Returns if two objects are equal.

A object. A object. if the values of and are equal.

Returns if two objects are not equal.

A object. A object. if the values of and are not equal.

Returns a value indicating if this instance is equal to the specified object.

A object to compare with this instance. if has the same low time and high time as this instance.

Returns a value indicating if this instance is equal to the specified object.

An object to compare with this instance. if is a object that has the same low time and high time as this instance.

Returns a value indicating if two specified instances of are equal.

A object. A object. if and are equal.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Returns a hash code for the object.

A 32-bit signed integer hash code. Two objects might have the same hash code even though they represent different values.

Gets or sets the amount of time the pulse is low.

The amount of time the pulse is low.

Gets or sets the amount of time the pulse is high.

The amount of time the pulse is high.

Specifies the behavior of a memory-optimized read method operation when the operation yields more samples than the current capacity of the buffer can allocate.

The read operation can request more memory if the operation yields more samples than the capacity of the provided buffer. You must use initialized data; otherwise, your application could throw a .

The read operation is limited to read up to the capacity of the provided buffer.

Specifies the pull up pull down level for each physical channel.

The NI-DAQmx driver returned an error.

Pull down state for pull up pull down resistors.

The NI-DAQmx driver returned an error.

Pull up state for pull up pull down resistors.

The NI-DAQmx driver returned an error.

Represents the method that handles the event.

The that caused this event. An that contains the event data.

Represents the method that handles the event.

The that caused this event. An that contains the event data.

Provides data for the event.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Initializes a new instance of the class with the specified exception.

An that explains why the task stopped, or if the task completed successfully.

Throws the that occurred, if any exists.

If the task stops due to an error, the property returns an that represents the particular error. If the task did not stop due to an error, the method returns. As an alternative to calling this method, you can check the property.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Gets the that occurred, if any.

If the task stops due to an error, this property returns an that represents the particular error. If the task did not stop due to an error, this value is . As an alternative to checking this property, you can call the method.

Provides data for the event.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Initializes a new instance of the class with the specified exception.

An that explains why the task stopped, or if the task completed successfully.

Throws the that occurred, if any exists.

If the task stops due to an error, the property returns an that represents the particular error. If the task did not stop due to an error, the method returns. As an alternative to calling this method, you can check the property.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Sets the object with information about the exception.

Object that holds the serialized object data. Contextual information about the source or destination.

Gets the that occurred, if any.

If the task stops due to an error, this property returns an that represents the particular error. If the task did not stop due to an error, this value is . As an alternative to checking this property, you can call the method.

Specifies the analog output state of the physical channels for some devices when your computer is powered on or the device is reset in NI-DAQmx.

For all NI-DAQmx simulated devices, power-up states are not persisted.

High-impedance state.

You can set high-impedance power-up states only for physical channels that support high-impedance output.

Current output.

You can set current power-up states only for physical channels that support current output.

Voltage output.

You can set voltage power-up states only for physical channels that support voltage output.

Specifies the action to take between each entry in a scan list.

When advancing to the next entry in the scan list, disconnect all previous connections before making any new connections.

When advancing to the next entry in the scan list, leave all previous connections intact.

Specifies if the task advances through the scan list multiple times.

The task returns to the beginning of the scan list when it reaches the end of the scan list.

The task advances through the scan list one time only. NI-DAQmx ignores any Advance Triggers after completing the scan list.

Specifies how you can use the channel. Using this property acts as a safety mechanism to prevent you from connecting two source channels, for example.

You can use the channel only to complete routes within a switch.

You can use the channel only as an input for a signal.

You can use the channel only as the output for a signal passing through the switch.

Specifies whether to use internal or external shunt when Shunt Cal A is selected.

Specifies whether to use internal or external shunt when Shunt Cal A is selected. Use this enumeration to get or set the value of .

Use the internal shunt.

Use an external shunt.

Contains methods for reading samples from the counter input channel in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to read from the specified .

The to read. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for readers to access the samples generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single sample from a counter task.

A sample from the task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. Use this method when counter samples are scaled to a floating-point value, such as for frequency and period measurement. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a sample from a counter task.

An sample from the task. Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads an sample from a counter task.

An sample from the task. Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a pulse sample in terms of frequency from a counter task.

A pulse sample in terms of frequency from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a pulse sample in terms of time from a counter task.

A pulse sample in terms of time from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a pulse sample in terms of ticks from a counter task.

A pulse sample in terms of ticks from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of samples from the task. Each element in the array corresponds to a sample from the channel. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. Use this method when counter samples are scaled to a floating-point value, such as for frequency and period measurement. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of samples from the task. Each element of the array corresponds to a sample from the task. Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of samples from the task. Each element of the array corresponds to a sample from the task. Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more pulse samples in terms of frequency from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of pulse samples in terms of frequency from the task. Each element of the array corresponds to a sample from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more pulse samples in terms of time from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of pulse samples in terms of time from the task. Each element of the array corresponds to a sample from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more pulse samples in terms of ticks from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 1D array of pulse samples in terms of ticks from the task. Each element of the array corresponds to a sample from the task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of . Refer to for more information. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Reads one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. There is not enough memory to carry out this operation.

Begins an asynchronous read of a sample from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are scaled to a floating-point value, such as for frequency and period measurement. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A sample from the task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a 32-bit integer sample from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. An sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a sample from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single pulse sample in terms of frequency from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A pulse sample in terms of frequency from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single pulse sample in terms of time from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A pulse sample in terms of time from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single pulse sample in terms of ticks from a counter task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A pulse sample in terms of ticks from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are scaled to a floating-point value, such as for frequency and period measurement. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information.

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of samples from the task. Each element in the array corresponds to a sample from the channel. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of samples from the task. Each element of the array corresponds to a sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more samples from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . Use this method when counter samples are returned unscaled, such as for event counting. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. A 1D array of samples from the task. Each element of the array corresponds to a sample from the task. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more pulse samples in terms of frequency from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of pulse samples in terms of frequency from the task. Each element in the array corresponds to a sample from the channel. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more pulse samples in terms of time from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of pulse samples in terms of time from the task. Each element in the array corresponds to a sample from the channel. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more pulse samples in terms of ticks from a counter task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 1D array of pulse samples in terms of ticks from the task. Each element in the array corresponds to a sample from the channel. If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback this is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. Dictates the reallocation behavior of the . Refer to for more information. An that represents the asynchronous call. When performing an asynchronous memory-optimized read, the size of the data buffer dynamically increases if the number of samples read exceeds the existing buffer and is . This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. An is thrown if the buffer is not capable of holding the data and is . To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous memory-optimized read of one or more samples from a single in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous counter input task. The memory allocation for the buffer is available to a maximum of 2 GB. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples read. This is useful when the reading operation yields fewer or more samples than the actual length of . A 1D array of samples that contains the read data. Each element in the array corresponds to a sample from the channel. If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Contains methods for reading samples from one or more counter input channels in a task.

Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Creates a new instance of the class to read from the specified .

The to read. The NI-DAQmx driver returned an error. Each object contains a property that serves as the connection point for readers to access the samples generated by that task. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to.

Reads a single sample from one or more objects in a task.

A 1D array of samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a single sample from one or more objects in a task.

A 1D array of samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads a single sample from one or more objects in a task.

A 1D array of samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. A 2D array of samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. The NI-DAQmx driver returned an error. There is not enough memory to carry out this operation.

Reads one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Reads one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Reads one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Reads one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Reads one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Reads one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A reference to the parameter containing samples from the task. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. If is or is uninitialized; If the first dimension of does not match the number of channels; or If is not , and is not capable of holding the required number of samples. The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation.

Begins an asynchronous read of a single sample from one or more objects in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read sample.

An that represents an asynchronous call started by calling . A 1D array of samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single sample from one or more objects in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read sample.

An that represents an asynchronous call started by calling . A 1D array of samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of a single sample from one or more objects in a task.

An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read sample.

An that represents an asynchronous call started by calling . A 1D array of samples from the task. Each element in the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An that represents the asynchronous call. To get the read data or any exceptions that occurred during an asynchronous read initiated with , call with the returned . NI-DAQmx scales the read data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods. Refer to Asynchronous Reads and Writes for additional information. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . A 2D array of samples from the task. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call before the asynchronous read represented by the provided is complete, waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Begins an asynchronous read of one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specifyif you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specifyif you do not need to pass any additional information to the callback. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specifyif you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . Dictates the reallocation behavior of the read operation. Refer to for more information. An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Begins an asynchronous read of one or more samples from one or more objects in a task.

The number of samples to read. If you set to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set to -1 for a finite acquisition, the read behavior is set by the property of the you are reading from. An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete. A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback. An initialized 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . An that represents the asynchronous call. If the data buffer is large enough to hold the number of samples requested, this overload attempts to reuse existing memory allocated from the array to acquire data. This results in more efficient memory allocation when performing multiple reads with a continuous analog input task. To get the read data or any exceptions that occurred during an asynchronous read initiated with this method, call with the returned . NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Handles the end of an asynchronous read initiated with and retrieves the read samples.

An that represents an asynchronous call started by calling . The actual number of samples per channel read. This is useful when the reading operation yields fewer samples than the actual length of . A 2D array of samples that contains the read data. Each element in the first dimension of the array corresponds to a channel in the task. Each element in the second dimension of the array corresponds to a sample from each of the channels. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify in . If you call this method before the asynchronous read is complete, it waits for the read to complete before returning. NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant. NI-DAQmx read and write methods time out after the amount of time specified by the property on the task you are reading from or writing to. Refer to Asynchronous Reads and Writes for additional information. If is or is uninitialized; If the first dimension of does not match the number of channels; If is not , and is not capable of holding the required number of samples; or For asynchronous reads, if is or is not an instance of returned from a call to . The NI-DAQmx driver returned an error during the asynchronous operation. There is not enough memory to carry out this operation. Asynchronous Reads and Writes

Returns a string representation of the object.

A string representation of the object. The NI-DAQmx driver returned an error. Overrides .

Specifies how events and callback delegates are invoked.

if events and callbacks are invoked through or . Otherwise, events and callbacks are invoked directly. The default value is . In some cases, callbacks and event handlers are executed in a different thread than the rest of the program. Therefore, you must take special care when accessing objects that have thread affinity, such as UI controls, from these callbacks and event handlers. For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Reading and Writing with NI-DAQmx Streams Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Gets or sets the object that marshals event-handler and callback calls.

The representing the object that marshals the event-handler and callback calls. The default value is . The NI-DAQmx driver returned an error. When the value of this property is , event-handler and callback calls are raised in the default manner. This behavior could mean that the calls happen from a thread other than the main thread. Avoid this behavior by setting this property to an object that implements , such as a or . For more information, refer to Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries. Events, Callbacks, and Thread Safety in Measurement Studio .NET Class Libraries

Specifies which measurements to use to calibrate an NI 4339 device.

Ratiometric mode.

Voltage mode.

Specifies the input terminal configuration for the channel to calibrate on an NI PXIe 4463 device.

A pseudodifferential input terminal configuration.

A differential input terminal configuration.

Specifies the input terminal configuration for the channel to calibrate on an NI 9209 device.

A differential input terminal configuration.

A referenced single-ended input terminal configuration.

Specifies the shunt calibration switch(es) to enable.

Switch B

Switch A

Specifies whether to use internal or external shunt.

Use the internal shunt.

Use an external shunt.

Use the default shunt.

Specifies which measurements to use to calibrate an NI 4480 device.

Charge mode.

Voltage mode.

Provides properties for configuring analog multi-edge start triggers.

Use this class to configure the task to start acquiring or generating samples when configured signals cross the respective levels you specify. To configure the task to use analog multi-edge reference triggering, call . To obtain a reference to an instance of this class, use .Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples. Analog triggering Start triggers

Returns a string representation of the object.

Specifies a list and/or range of analog sources that are going to be used for Analog triggering. Each source corresponds to an element in each of the Analog Multi Edge property arrays, if they are not empty.

Specifies a list and/or range of analog sources that are going to be used for Analog triggering. Each source corresponds to an element in each of the Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error.

Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array of thresholds in the units of the measurement or generation to start acquiring or generating samples. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array of thresholds in the units of the measurement or generation to start acquiring or generating samples. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array of hysteresis levels in the units of the measurement or generation. If the corresponding element of Start.AnlgMultiEdge.Slopes is Rising, the trigger does not deassert until the source signal passes below the corresponding element of Start.AnlgMultiEdge.Lvls minus the hysteresis. If Start.AnlgEdge.Slope is Falling, the trigger does not deassert until the source signal passes above Start.AnlgEdge.Lvl plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array of hysteresis levels in the units of the measurement or generation. If the corresponding element of Start.AnlgMultiEdge.Slopes is Rising, the trigger does not deassert until the source signal passes below the corresponding element of Start.AnlgMultiEdge.Lvls minus the hysteresis. If Start.AnlgEdge.Slope is Falling, the trigger does not deassert until the source signal passes above Start.AnlgEdge.Lvl plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Provides properties for configuring time start triggers.

For more information refer to Time-Based Features for Network-Synchronized Devices .Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

Gets or sets when to trigger the start trigger.

When to trigger the start trigger. The NI-DAQmx driver returned an error. The trigger time is represented by a expressed as a UTC time. To set a trigger time based on the current system time, use , adding an offset, rather than .

Specifies the timescale to be used for timestamps used in a time trigger.

Specifies the timescale to be used for timestamps used in a time trigger. The NI-DAQmx driver returned an error.

Provides properties for configuring analog multi-edge reference triggers.

Use this class to configure the task to stop the acquisition when the device acquires all pretrigger samples; any of the configured analog signals cross the respective levels you specified; and the device acquires all post-trigger samples. To configure the task to use analog multi-edge reference triggering, call . To obtain a reference to an instance of this class, use .Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples. Analog triggering Reference triggers

Returns a string representation of the object.

Specifies a List and/or range of analog sources that are going to be used for Analog triggering. Each source corresponds to an element in each of the Analog Multi Edge property arrays, if they are not empty.

Specifies a List and/or range of analog sources that are going to be used for Analog triggering. Each source corresponds to an element in each of the Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error.

Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array of thresholds in the units of the measurement or generation to start acquiring or generating samples. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array of thresholds in the units of the measurement or generation to start acquiring or generating samples. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array of hysteresis levels in the units of the measurement or generation. If the corresponding element of Ref.AnlgMultiEdge.Slopes is Rising, the trigger does not deassert until the source signal passes below the corresponding element of Ref.AnlgMultiEdge.Lvls minus the hysteresis. If Ref.AnlgEdge.Slope is Falling, the trigger does not deassert until the source signal passes above Ref.AnlgEdge.Lvl plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array of hysteresis levels in the units of the measurement or generation. If the corresponding element of Ref.AnlgMultiEdge.Slopes is Rising, the trigger does not deassert until the source signal passes below the corresponding element of Ref.AnlgMultiEdge.Lvls minus the hysteresis. If Ref.AnlgEdge.Slope is Falling, the trigger does not deassert until the source signal passes above Ref.AnlgEdge.Lvl plus the hysteresis. Hysteresis is always enabled. Set this property to a non-zero value to use hysteresis. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. The NI-DAQmx driver returned an error. This property returns a copy of the actual array. Avoid calling this property within a for loop because it creates a copy for each iteration of the loop. Avoid using an indexer to set a member of the array because the indexer returns a copy of the object and has no effect on the actual object.

Provides properties for configuring time arm start triggers.

For more information refer to Time-Based Features for Network-Synchronized Devices .Example applications are located in the Public Documents\National Instruments\NI-DAQ\Examples\DotNET4.x directory or in the Start menu at National InstrumentsNI-DAQmxNI-DAQmx Examples.

Returns a string representation of the object.

Gets or sets when to trigger the arm start trigger.

When to trigger the arm start trigger. The NI-DAQmx driver returned an error. The trigger time is represented by a expressed as a UTC time. To set a trigger time based on the current system time, use , adding an offset, rather than .

Specifies the timescale to be used for timestamps used in an arm start time trigger.

Specifies the timescale to be used for timestamps used in an arm start time trigger. The NI-DAQmx driver returned an error.

Represents the type of timestamp event.

Arm start trigger timestamp.

Start trigger timestamp.

First sample timestamp.

Reference trigger timestamp.

Represents the coupling of the calibration constants to be adjusted on the C Series NI 9775.

Use this enumeration with and to specify the coupling of the calibration constants to be adjusted.

AC coupling.

DC coupling.

(Deprecated) Specifies the type of trigger to use to advance to the next entry in a switch scan list.

(Deprecated) Specifies the type of trigger to use to advance to the next entry in a switch scan list. Use this enumeration to get or set the value of .

Advance to the next entry in a scan list on the rising or falling edge of a digital signal.

Advance to the next entry in a scan list when you call sending a software trigger.

Advance through all entries in the scan list as fast as possible.

(Deprecated) Specifies on which edge of a digital signal to advance to the next entry in a scan list.

(Deprecated) Specifies on which edge of a digital signal to advance to the next entry in a scan list. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Indicates the product category of the device. This category corresponds to the category displayed in MAX when creating NI-DAQmx simulated devices.

Indicates the product category of the device. This category corresponds to the category displayed in MAX when creating NI-DAQmx simulated devices. Use this enumeration to get or set the value of .

M Series DAQ.

X Series DAQ.

E Series DAQ.

S Series DAQ.

B Series DAQ.

SC Series DAQ.

USB DAQ.

AO Series.

Digital I/O.

TIO Series.

Dynamic Signal Acquisition.

Switches.

CompactDAQ chassis.

C Series I/O module.

SCXI module.

SCC Connector Block.

SCC Module.

NI ELVIS.

Network DAQ.

SC Express.

Unknown category.

Indicates the AI digital filter types supported by the device.

Indicates the AI digital filter types supported by the device. Use this enumeration to get or set the value of .

Lowpass filter.

Highpass filter.

Bandpass filter.

Notch filter.

Custom filter.

Indicates the bus type of the device.

Indicates the bus type of the device. Use this enumeration to get or set the value of .

PCI.

PCI Express.

PXI.

PXI Express.

SCXI.

SCC.

PC Card/PCMCIA.

USB.

CompactDAQ.

TCP/IP.

Unknown bus type.

SwitchBlock.

Indicates the measurement to take with the analog input channel and in some cases, such as for temperature measurements, the sensor to use.

Indicates the measurement to take with the analog input channel and in some cases, such as for temperature measurements, the sensor to use. Use this enumeration to get or set the value of .

Voltage measurement.

Voltage RMS measurement.

Current measurement.

Current RMS measurement.

Voltage measurement with an excitation source. You can use this measurement type for custom sensors that require excitation, but you must use a custom scale to scale the measured voltage.

Measure voltage ratios from a Wheatstone bridge.

Frequency measurement using a frequency to voltage converter.

Resistance measurement.

Temperature measurement using a thermocouple.

Temperature measurement using a thermistor.

Temperature measurement using an RTD.

Temperature measurement using a built-in sensor on a terminal block or device. On SCXI modules, for example, this could be the CJC sensor.

Strain measurement.

Strain measurement using a rosette strain gage.

Position measurement using an LVDT.

Position measurement using an RVDT.

Position measurement using an eddy current proximity probe.

Acceleration measurement using an accelerometer.

Acceleration measurement using a charge-based sensor.

Acceleration measurement using a 4 wire DC voltage based sensor.

Velocity measurement using an IEPE Sensor.

Force measurement using a bridge-based sensor.

Force measurement using an IEPE Sensor.

Pressure measurement using a bridge-based sensor.

Sound pressure measurement using a microphone.

Torque measurement using a bridge-based sensor.

Measurement type defined by TEDS.

Charge measurement.

Specifies the units to use to return voltage measurements from the channel.

Specifies the units to use to return voltage measurements from the channel. Use this enumeration to get or set the value of .

Volts.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Units defined by TEDS information associated with the channel.

Specifies the units to use to return voltage RMS measurements from the channel.

Specifies the units to use to return voltage RMS measurements from the channel. Use this enumeration to get or set the value of .

Volts.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Units defined by TEDS information associated with the channel.

Specifies the units to use to return temperature measurements from the channel.

Specifies the units to use to return temperature measurements from the channel. Use this enumeration to get or set the value of .

Degrees Celsius.

Degrees Fahrenheit.

Kelvins.

Degrees Rankine.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range.

Specifies the type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range. Use this enumeration to get or set the value of .

J-type thermocouple.

K-type thermocouple.

N-type thermocouple.

R-type thermocouple.

S-type thermocouple.

T-type thermocouple.

B-type thermocouple.

E-type thermocouple.

Specifies the method or equation form that the thermocouple scale uses.

Specifies the method or equation form that the thermocouple scale uses. Use this enumeration to get or set the value of .

Scale values by using an Nth order polynomial equation.

Map an array of prescaled values to an array of corresponding scaled values, with all other values scaled proportionally.

Indicates the source of cold-junction compensation.

Indicates the source of cold-junction compensation. Use this enumeration to get or set the value of .

Use a cold-junction compensation channel built into the terminal block.

You must specify the cold-junction temperature.

Use a channel for cold-junction compensation.

Specifies the type of RTD connected to the channel.

Specifies the type of RTD connected to the channel. Use this enumeration to get or set the value of .

Pt3750.

Pt3851.

Pt3911.

Pt3916.

Pt3920.

Pt3928.

You must use , , and to supply the coefficients for the Callendar-Van Dusen equation.

Specifies the units to use to return current measurements from the channel.

Specifies the units to use to return current measurements from the channel. Use this enumeration to get or set the value of .

Amperes.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Units defined by TEDS information associated with the channel.

Specifies the units to use to return current RMS measurements from the channel.

Specifies the units to use to return current RMS measurements from the channel. Use this enumeration to get or set the value of .

Amperes.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Units defined by TEDS information associated with the channel.

Specifies the units to use to return strain measurements from the channel.

Specifies the units to use to return strain measurements from the channel. Use this enumeration to get or set the value of .

Strain.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the bridge configuration of the strain gages.

Specifies the bridge configuration of the strain gages. Use this enumeration to get or set the value of .

Four active gages with two pairs subjected to equal and opposite strains.

Four active gages with two aligned with maximum principal strain and two Poisson gages in adjacent arms.

Four active gages with two aligned with maximum principal strain and two Poisson gages in opposite arms.

Two active gages with one aligned with maximum principal strain and one Poisson gage.

Two active gages with equal and opposite strains.

Single active gage.

Single active gage and one dummy gage.

Indicates the type of rosette gage.

Indicates the type of rosette gage. Use this enumeration to get or set the value of .

A rectangular rosette consists of three strain gages, each separated by a 45 degree angle.

A delta rosette consists of three strain gages, each separated by a 60 degree angle.

A tee rosette consists of two gages oriented at 90 degrees with respect to each other.

Specifies the type of rosette measurement.

Specifies the type of rosette measurement. Use this enumeration to get or set the value of .

The maximum tensile strain coplanar to the surface of the material under stress.

The minimum tensile strain coplanar to the surface of the material under stress.

The angle at which the principal strains of the rosette occur.

The tensile strain coplanar to the surface of the material under stress in the X coordinate direction.

The tensile strain coplanar to the surface of the material under stress in the Y coordinate direction.

The tensile strain coplanar to the surface of the material under stress in the XY coordinate direction.

The maximum strain coplanar to the cross section of the material under stress.

The angle at which the maximum shear strain of the rosette occurs.

Specifies the units to use to return resistance measurements.

Specifies the units to use to return resistance measurements. Use this enumeration to get or set the value of .

Ohms.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Units defined by TEDS information associated with the channel.

Specifies the units to use to return frequency measurements from the channel.

Specifies the units to use to return frequency measurements from the channel. Use this enumeration to get or set the value of .

Hertz.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units to use to return linear position measurements from the channel.

Specifies the units to use to return linear position measurements from the channel. Use this enumeration to get or set the value of .

Meters.

Inches.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units of .

Specifies the units of . Use this enumeration to get or set the value of .

mVolts/Volt/mMeter.

mVolts/Volt/0.001 Inch.

Specifies the units to use to return angular position measurements from the channel.

Specifies the units to use to return angular position measurements from the channel. Use this enumeration to get or set the value of .

Degrees.

Radians.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units of .

Specifies the units of . Use this enumeration to get or set the value of .

mVolts/Volt/Degree.

mVolts/Volt/Radian.

Specifies the units to use to return proximity measurements from the channel.

Specifies the units to use to return proximity measurements from the channel. Use this enumeration to get or set the value of .

Meters.

Inches.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units of .

Specifies the units of . Use this enumeration to get or set the value of .

mVolts/mil.

Volts/mil.

mVolts/mMeter.

Volts/mMeter.

mVolts/micron.

Specifies the units to use to return sound pressure measurements from the channel.

Specifies the units to use to return sound pressure measurements from the channel. Use this enumeration to get or set the value of .

Pascals.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units to use to return acceleration measurements from the channel.

Specifies the units to use to return acceleration measurements from the channel. Use this enumeration to get or set the value of .

1 g is approximately equal to 9.81 m/s/s.

Meters per second per second.

Inches per second per second.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units of AI.Accel.4WireDCVoltage.Sensitivity.

Specifies the units of AI.Accel.4WireDCVoltage.Sensitivity. Use this enumeration to get or set the value of .

mVolts/g.

Volts/g.

Specifies the units of .

Specifies the units of . Use this enumeration to get or set the value of .

mVolts/g.

Volts/g.

Specifies the units of AI.Accel.Charge.Sensitivity.

Specifies the units of AI.Accel.Charge.Sensitivity. Use this enumeration to get or set the value of .

PicoCoulombs per g.

PicoCoulombs per m/s^2.

PicoCoulombs per in/s^2.

Specifies in which unit to return velocity measurements from the channel.

Specifies in which unit to return velocity measurements from the channel. Use this enumeration to get or set the value of .

Meters per second.

Inches per second.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units for .

Specifies the units for . Use this enumeration to get or set the value of .

Millivolts per millimeter per second.

Millivolts per inch per second.

Specifies in which unit to return force or load measurements from the channel.

Specifies in which unit to return force or load measurements from the channel. Use this enumeration to get or set the value of .

Newtons.

Pounds.

Kilograms-force.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units for .

Specifies the units for . Use this enumeration to get or set the value of .

Millivolts per newton.

Millivolts per pound.

Specifies in which unit to return pressure measurements from the channel.

Specifies in which unit to return pressure measurements from the channel. Use this enumeration to get or set the value of .

Pascals.

Pounds per square inch.

Bar.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies in which unit to return torque measurements from the channel.

Specifies in which unit to return torque measurements from the channel. Use this enumeration to get or set the value of .

Newton meters.

Ounce-inches.

Pound-inches.

Pound-feet.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies in which unit to return voltage ratios from the channel.

Specifies in which unit to return voltage ratios from the channel. Use this enumeration to get or set the value of .

Volts per volt.

Millivolts per volt.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Units defined by TEDS information associated with the channel.

Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values. Use this enumeration to get or set the value of .

Volts per volt.

Millivolts per volt.

Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values. Use this enumeration to get or set the value of .

Newtons.

Pounds.

kilograms-force.

Pascals.

Pounds per square inch.

Bar.

Newton metres.

Ounce-inches.

Pound-inches.

Pound-feet.

Specifies the scaling type to use when scaling electrical values from the sensor to physical units.

Specifies the scaling type to use when scaling electrical values from the sensor to physical units. Use this enumeration to get or set the value of .

Do not scale electrical values to physical units.

You provide two pairs of electrical values and their corresponding physical values. NI-DAQmx uses those values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values.

Map an array of electrical values to an array of corresponding physical values, with all other values scaled proportionally. If you specify this scaling type, and must be within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints.

Scale values by using an Nth order polynomial equation.

Specifies the units to use to return charge measurements from the channel.

Specifies the units to use to return charge measurements from the channel. Use this enumeration to get or set the value of .

Coulombs.

PicoCoulombs.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the coupling for the channel.

Specifies the coupling for the channel. Use this enumeration to get or set the value of .

Remove the DC offset from the signal.

Allow NI-DAQmx to measure all of the signal.

Remove the signal from the measurement and measure only ground.

Specifies the terminal configuration for the channel.

Specifies the terminal configuration for the channel. Use this enumeration to get or set the value of .

Referenced Single-Ended.

Non-Referenced Single-Ended.

Differential.

Pseudodifferential.

Specifies the resistance configuration for the channel. NI-DAQmx uses this value for any resistance-based measurements, including temperature measurement using a thermistor or RTD.

Specifies the resistance configuration for the channel. NI-DAQmx uses this value for any resistance-based measurements, including temperature measurement using a thermistor or RTD. Use this enumeration to get or set the value of .

2-wire mode.

3-wire mode.

4-wire mode.

Specifies the type of Wheatstone bridge connected to the channel.

Specifies the type of Wheatstone bridge connected to the channel. Use this enumeration to get or set the value of .

Sensor is a full bridge. If you set to , NI-DAQmx divides the measurement by the excitation value. Many sensors scale data to native units using scaling of volts per excitation.

Sensor is a half bridge. If you set to , NI-DAQmx divides the measurement by the excitation value. Many sensors scale data to native units using scaling of volts per excitation.

Sensor is a quarter bridge. If you set to , NI-DAQmx divides the measurement by the excitation value. Many sensors scale data to native units using scaling of volts per excitation.

Sensor is not a Wheatstone bridge.

Specifies which shunt calibration switch(es) to enable. Use to enable the switch(es) you specify with this property.

Specifies which shunt calibration switch(es) to enable. Use to enable the switch(es) you specify with this property. Use this enumeration to get or set the value of .

Switch A.

Switch B.

Switches A and B.

Specifies the shunt resistor location for current measurements.

Specifies the shunt resistor location for current measurements. Use this enumeration to get or set the value of .

Use the built-in shunt resistor of the device.

Use a shunt resistor external to the device. You must specify the value of the shunt resistor by using .

Specifies whether to use local or remote sense to sense excitation.

Specifies whether to use local or remote sense to sense excitation. Use this enumeration to get or set the value of .

Local.

Remote.

Specifies the source of excitation.

Specifies the source of excitation. Use this enumeration to get or set the value of .

Use the built-in excitation source of the device. If you select this value, you must specify the amount of excitation.

Use an excitation source other than the built-in excitation source of the device. If you select this value, you must specify the amount of excitation.

Supply no excitation to the channel.

Specifies if the excitation supply is DC or AC.

Specifies if the excitation supply is DC or AC. Use this enumeration to get or set the value of .

DC excitation.

AC excitation.

Specifies if the channel uses current or voltage excitation.

Specifies if the channel uses current or voltage excitation. Use this enumeration to get or set the value of .

Voltage excitation.

Current excitation.

Specifies whether this channel will disable excitation after the task is uncommitted. Setting this to Zero Volts or Amps disables excitation after task uncommit. Setting this attribute to Maintain Existing Value leaves the excitation on after task uncommit.

Specifies whether this channel will disable excitation after the task is uncommitted. Setting this to Zero Volts or Amps disables excitation after task uncommit. Setting this attribute to Maintain Existing Value leaves the excitation on after task uncommit. Use this enumeration to get or set the value of .

Drive excitation output to zero.

Continue generating the current value.

Specifies the number of leads on the LVDT or RVDT. Some sensors require you to tie leads together to create a four- or five- wire sensor. Refer to the sensor documentation for more information.

Specifies the number of leads on the LVDT or RVDT. Some sensors require you to tie leads together to create a four- or five- wire sensor. Refer to the sensor documentation for more information. Use this enumeration to get or set the value of .

4-wire.

5-wire.

6-wire.

Specifies the source of the filter clock. If you need a higher resolution for the filter, you can supply an external clock to increase the resolution. Refer to the SCXI-1141/1142/1143 User Manual for more information.

Specifies the source of the filter clock. If you need a higher resolution for the filter, you can supply an external clock to increase the resolution. Refer to the SCXI-1141/1142/1143 User Manual for more information. Use this enumeration to get or set the value of .

Internal to the device.

External to the device.

Specifies the digital filter type.

Specifies the digital filter type. Use this enumeration to get or set the value of .

Lowpass filter.

Highpass filter.

Bandpass filter.

Notch filter.

Custom filter.

Specifies the digital filter response.

Specifies the digital filter response. Use this enumeration to get or set the value of .

Constant group delay filter response.

Butterworth filter response.

Elliptical filter response.

Use the hardware-defined filter response.

Specifies the units of and .

Specifies the units of and . Use this enumeration to get or set the value of .

Seconds.

Sample Clock Periods.

Indicates the units of .

Indicates the units of . Use this enumeration to get or set the value of .

Bits.

Indicates the justification of a raw sample from the device.

Indicates the justification of a raw sample from the device. Use this enumeration to get or set the value of .

Samples occupy the lower bits of the integer.

Samples occupy the higher bits of the integer.

Specifies the ADC timing mode, controlling the tradeoff between speed and effective resolution. Some ADC timing modes provide increased powerline noise rejection. On devices that have an AI Convert clock, this setting affects both the maximum and default values for . You must use the same ADC timing mode for all channels on a device, but you can use different ADC timing modes for different devices in the same task.

Specifies the ADC timing mode, controlling the tradeoff between speed and effective resolution. Some ADC timing modes provide increased powerline noise rejection. On devices that have an AI Convert clock, this setting affects both the maximum and default values for . You must use the same ADC timing mode for all channels on a device, but you can use different ADC timing modes for different devices in the same task. Use this enumeration to get or set the value of .

Uses the most appropriate supported timing mode based on the Sample Clock Rate.

Increases resolution and noise rejection while decreasing conversion rate.

Increases conversion rate while decreasing resolution.

Improves 50 Hz noise rejection while decreasing noise rejection at other frequencies.

Improves 60 Hz noise rejection while decreasing noise rejection at other frequencies.

Use to specify a custom value controlling the tradeoff between speed and resolution.

Specifies the method or equation form that the calibration scale uses.

Specifies the method or equation form that the calibration scale uses. Use this enumeration to get or set the value of .

Scale values by using an Nth order polynomial equation.

Map an array of prescaled values to an array of corresponding scaled values, with all other values scaled proportionally.

Specifies how often to measure ground. NI-DAQmx subtracts the measured ground voltage from every sample.

Specifies how often to measure ground. NI-DAQmx subtracts the measured ground voltage from every sample. Use this enumeration to get or set the value of .

Do not perform an autozero.

Perform an auto zero at the beginning of the acquisition. This auto zero task might not run if you have used previously in your task.

Perform an auto zero at every sample of the acquisition.

Specifies the data transfer mode for the device.

Specifies the data transfer mode for the device. Use this enumeration to get or set the value of .

Direct Memory Access. Data transfers take place independently from the application.

Data transfers take place independently from the application. Using interrupts increases CPU usage because the CPU must service interrupt requests. Typically, you should use interrupts if the device is out of DMA channels.

Data transfers take place when you call reading from the task or writing to the task.

Data transfers take place independently from the application using a USB bulk pipe.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer. Use this enumeration to get or set the value of .

Transfer data from the device when more than half of the onboard memory of the device fills.

Transfer data from the device when there is data in the onboard memory.

Transfer data from the device when the number of samples specified with are in the device FIFO.

Transfer data when the acquisition is complete.

Specifies the type of compression to apply to raw samples returned from the device.

Specifies the type of compression to apply to raw samples returned from the device. Use this enumeration to get or set the value of .

Do not compress samples.

Remove unused bits from samples. No resolution is lost.

Remove unused bits from samples. Then, if necessary, remove bits from samples until the samples are the size specified with . This compression type limits resolution to the specified sample size.

Indicates whether the channel generates voltage, current, or a waveform.

Indicates whether the channel generates voltage, current, or a waveform. Use this enumeration to get or set the value of .

Voltage generation.

Current generation.

Function generation.

Specifies in what units to generate voltage on the channel. Write data to the channel in the units you select.

Specifies in what units to generate voltage on the channel. Write data to the channel in the units you select. Use this enumeration to get or set the value of .

Volts.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies in what units to generate current on the channel. Write data to the channel in the units you select.

Specifies in what units to generate current on the channel. Write data to the channel in the units you select. Use this enumeration to get or set the value of .

Amperes.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Units defined by TEDS information associated with the channel.

Specifies the kind of the waveform to generate.

Specifies the kind of the waveform to generate. Use this enumeration to get or set the value of .

Sine wave.

Triangle wave.

Square wave.

Sawtooth wave.

Specifies if the device generates a modulated version of the waveform using the original waveform as a carrier and input from an external terminal as the signal.

Specifies if the device generates a modulated version of the waveform using the original waveform as a carrier and input from an external terminal as the signal. Use this enumeration to get or set the value of .

Amplitude modulation.

Frequency modulation.

No modulation.

Specifies the state of the channel when no generation is in progress.

Specifies the state of the channel when no generation is in progress. Use this enumeration to get or set the value of .

Generate 0 V.

Set the channel to high-impedance, effectively disconnecting the analog output circuitry from the I/O connector.

Continue generating the current value.

Specifies the terminal configuration of the channel.

Specifies the terminal configuration of the channel. Use this enumeration to get or set the value of .

Referenced Single-Ended.

Differential.

Pseudodifferential.

Specifies the units of .

Specifies the units of . Use this enumeration to get or set the value of .

Bits.

Specifies the source of the DAC reference voltage. The value of this voltage source determines the full-scale value of the DAC.

Specifies the source of the DAC reference voltage. The value of this voltage source determines the full-scale value of the DAC. Use this enumeration to get or set the value of .

Internal to the device.

External to the device.

Specifies the source of the DAC offset voltage. The value of this voltage source determines the full-scale value of the DAC.

Specifies the source of the DAC offset voltage. The value of this voltage source determines the full-scale value of the DAC. Use this enumeration to get or set the value of .

Internal to the device.

External to the device.

Specifies the units of and .

Specifies the units of and . Use this enumeration to get or set the value of .

Seconds.

Sample Clock Periods.

Specifies the data transfer mode for the device.

Specifies the data transfer mode for the device. Use this enumeration to get or set the value of .

Direct Memory Access. Data transfers take place independently from the application.

Data transfers take place independently from the application. Using interrupts increases CPU usage because the CPU must service interrupt requests. Typically, you should use interrupts if the device is out of DMA channels.

Data transfers take place when you call reading from the task or writing to the task.

Data transfers take place independently from the application using a USB bulk pipe.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device. Use this enumeration to get or set the value of .

Transfer data to the device only when there is no data in the onboard memory of the device.

Transfer data to the device any time the onboard memory is less than half full.

Transfer data to the device any time the onboard memory of the device is not full.

Specifies the logic family to use for acquisition. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families.

Specifies the logic family to use for acquisition. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families. Use this enumeration to get or set the value of .

Compatible with 2.5 V CMOS signals.

Compatible with LVTTL signals.

Compatible with TTL and 5 V CMOS signals.

Specifies the data transfer mode for the device.

Specifies the data transfer mode for the device. Use this enumeration to get or set the value of .

Direct Memory Access. Data transfers take place independently from the application.

Data transfers take place independently from the application. Using interrupts increases CPU usage because the CPU must service interrupt requests. Typically, you should use interrupts if the device is out of DMA channels.

Data transfers take place when you call reading from the task or writing to the task.

Data transfers take place independently from the application using a USB bulk pipe.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer. Use this enumeration to get or set the value of .

Transfer data from the device when more than half of the onboard memory of the device fills.

Transfer data from the device when there is data in the onboard memory.

Transfer data from the device when the number of samples specified with are in the device FIFO.

Transfer data when the acquisition is complete.

Specifies on which edge of the sample clock to acquire samples.

Specifies on which edge of the sample clock to acquire samples. Use this enumeration to get or set the value of .

Active edges.

Inactive edges.

Specifies the drive type for digital output channels.

Specifies the drive type for digital output channels. Use this enumeration to get or set the value of .

Drive the output pin to approximately 0 V for logic low and +3.3 V or +5 V, depending on the device, for logic high.

Drive the output pin to 0 V for logic low. For logic high, the output driver assumes a high-impedance state and does not drive a voltage.

Specifies the state of the lines in a digital output task when the task starts.

Specifies the state of the lines in a digital output task when the task starts. Use this enumeration to get or set the value of .

Logic high.

Logic low.

High-impedance state. You can select this state only on devices with bidirectional lines. You cannot select this state for dedicated digital output lines. On some devices, you can select this value only for entire ports.

Do not change the state of the lines. On some devices, you can select this value only for entire ports.

Specifies the state of the lines in a digital output task when the task pauses.

Specifies the state of the lines in a digital output task when the task pauses. Use this enumeration to get or set the value of .

Logic high.

Logic low.

High-impedance state. You can select this state only on devices with bidirectional lines. You cannot select this state for dedicated digital output lines. On some devices, you can select this value only for entire ports.

Do not change the state of the lines. On some devices, you can select this value only for entire ports.

Specifies the state of the lines in a digital output task when the task completes execution.

Specifies the state of the lines in a digital output task when the task completes execution. Use this enumeration to get or set the value of .

Logic high.

Logic low.

High-impedance state. You can select this state only on devices with bidirectional lines. You cannot select this state for dedicated digital output lines. On some devices, you can select this value only for entire ports.

Do not change the state of the lines. On some devices, you can select this value only for entire ports.

Specifies the logic family to use for generation. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families.

Specifies the logic family to use for generation. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families. Use this enumeration to get or set the value of .

Compatible with 2.5 V CMOS signals.

Compatible with LVTTL signals.

Compatible with TTL and 5 V CMOS signals.

Specifies the data transfer mode for the device.

Specifies the data transfer mode for the device. Use this enumeration to get or set the value of .

Direct Memory Access. Data transfers take place independently from the application.

Data transfers take place independently from the application. Using interrupts increases CPU usage because the CPU must service interrupt requests. Typically, you should use interrupts if the device is out of DMA channels.

Data transfers take place when you call reading from the task or writing to the task.

Data transfers take place independently from the application using a USB bulk pipe.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device. Use this enumeration to get or set the value of .

Transfer data to the device only when there is no data in the onboard memory of the device.

Transfer data to the device any time the onboard memory is less than half full.

Transfer data to the device any time the onboard memory of the device is not full.

Specifies on which edge of the sample clock to generate samples.

Specifies on which edge of the sample clock to generate samples. Use this enumeration to get or set the value of .

Active edges.

Inactive edges.

Indicates the measurement to take with the channel.

Indicates the measurement to take with the channel. Use this enumeration to get or set the value of .

Count edges of a digital signal.

Measure the frequency of a digital signal.

Measure the period of a digital signal.

Measure the width of a pulse of a digital signal.

Measure the time between state transitions of a digital signal.

Pulse measurement, returning the result as frequency and duty cycle.

Pulse measurement, returning the result as high time and low time.

Pulse measurement, returning the result as high ticks and low ticks.

Measure the duty cycle of a digital signal.

Angular position measurement using an angular encoder.

Linear position measurement using a linear encoder.

Angular velocity measurement using an angular encoder.

Linear velocity measurement using a linear encoder.

Measure time between edges of two digital signals.

Timestamp measurement, synchronizing the counter to a GPS receiver.

Specifies the units to use to return frequency measurements.

Specifies the units to use to return frequency measurements. Use this enumeration to get or set the value of .

Hertz.

Timebase ticks.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies between which edges to measure the frequency of the signal.

Specifies between which edges to measure the frequency of the signal. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the method to use to measure the frequency of the signal.

Specifies the method to use to measure the frequency of the signal. Use this enumeration to get or set the value of .

Use one counter that uses a constant timebase to measure the input signal.

Use two counters, one of which counts pulses of the signal to measure during the specified measurement time.

Use one counter to divide the frequency of the input signal to create a lower-frequency signal that the second counter can more easily measure.

Uses one counter and automatically configures the counter settings based on the range of frequencies to be measured. During the acquisition, the counter dynamically adjusts the number of periods that are averaged to balance measurement accuracy and latency.

Specifies the unit to use to return period measurements.

Specifies the unit to use to return period measurements. Use this enumeration to get or set the value of .

Seconds.

Timebase ticks.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies between which edges to measure the period of the signal.

Specifies between which edges to measure the period of the signal. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the method to use to measure the period of the signal.

Specifies the method to use to measure the period of the signal. Use this enumeration to get or set the value of .

Use one counter that uses a constant timebase to measure the input signal.

Use two counters, one of which counts pulses of the signal to measure during the specified measurement time.

Use one counter to divide the frequency of the input signal to create a lower-frequency signal that the second counter can more easily measure.

Uses one counter and automatically configures the counter settings based on the range of frequencies to be measured. During the acquisition, the counter dynamically adjusts the number of periods that are averaged to balance measurement accuracy and latency.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies whether to increment or decrement the counter on each edge.

Specifies whether to increment or decrement the counter on each edge. Use this enumeration to get or set the value of .

Increment counter.

Decrement counter.

The state of a digital line controls the count direction. Each counter has a default count direction terminal.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies on which edges to increment or decrement the counter.

Specifies on which edges to increment or decrement the counter. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies on which edge of the signal to reset the count.

Specifies on which edge of the signal to reset the count. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the gate terminal configuration.

Specifies the gate terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the gate input line.

Specifies the logic level behavior on the gate input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies whether the counter gates input pulses while the signal is high or low.

Specifies whether the counter gates input pulses while the signal is high or low. Use this enumeration to get or set the value of .

High state.

Low state.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies which edge of the input signal to begin the duty cycle measurement.

Specifies which edge of the input signal to begin the duty cycle measurement. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the units to use to return angular position measurements from the channel.

Specifies the units to use to return angular position measurements from the channel. Use this enumeration to get or set the value of .

Degrees.

Radians.

Ticks.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units to use to return linear encoder measurements from the channel.

Specifies the units to use to return linear encoder measurements from the channel. Use this enumeration to get or set the value of .

Meters.

Inches.

Ticks.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. , , and are valid for quadrature encoders only. is valid for two-pulse encoders only.

Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. , , and are valid for quadrature encoders only. is valid for two-pulse encoders only. Use this enumeration to get or set the value of .

If signal A leads signal B, count the rising edges of signal A. If signal B leads signal A, count the falling edges of signal A.

Count the rising and falling edges of signal A.

Count the rising and falling edges of signal A and signal B.

Increment the count on rising edges of signal A. Decrement the count on rising edges of signal B.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies the states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while signal A and signal B are high, for example, you must choose a phase other than .

Specifies the states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while signal A and signal B are high, for example, you must choose a phase other than . Use this enumeration to get or set the value of .

Reset the measurement when signal A and signal B are high.

Reset the measurement when signal A is high and signal B is low.

Reset the measurement when signal A is low and signal B high.

Reset the measurement when signal A and signal B are low.

Specifies the units to use to return pulse width measurements.

Specifies the units to use to return pulse width measurements. Use this enumeration to get or set the value of .

Seconds.

Timebase ticks.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies on which edge of the input signal to begin each pulse width measurement.

Specifies on which edge of the input signal to begin each pulse width measurement. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the units to use to return timestamp measurements.

Specifies the units to use to return timestamp measurements. Use this enumeration to get or set the value of .

Seconds.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the method to use to synchronize the counter to a GPS receiver.

Specifies the method to use to synchronize the counter to a GPS receiver. Use this enumeration to get or set the value of .

Use the IRIG-B synchronization method. The GPS receiver sends one synchronization pulse per second, as well as information about the number of days, hours, minutes, and seconds that elapsed since the beginning of the current year.

Use the PPS synchronization method. The GPS receiver sends one synchronization pulse per second, but does not send any timing information. The timestamp measurement returns the number of seconds that elapsed since the device powered up unless you set .

Do not synchronize the counter to a GPS receiver. The timestamp measurement returns the number of seconds that elapsed since the device powered up unless you set .

Specifies the units to use to return angular velocity counter measurements.

Specifies the units to use to return angular velocity counter measurements. Use this enumeration to get or set the value of .

Revolutions per minute.

Radians per second.

Degrees per second.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the units to use to return linear encoder velocity measurements from the channel.

Specifies the units to use to return linear encoder velocity measurements from the channel. Use this enumeration to get or set the value of .

Meters per second.

Inches per second.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. Two Pulse Counting is valid for two-pulse encoders only.

Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. Two Pulse Counting is valid for two-pulse encoders only. Use this enumeration to get or set the value of .

If signal A leads signal B, count the rising edges of signal A. If signal B leads signal A, count the falling edges of signal A.

Count the rising and falling edges of signal A.

Count the rising and falling edges of signal A and signal B.

Increment the count on rising edges of signal A. Decrement the count on rising edges of signal B.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior of the input terminal.

Specifies the logic level behavior of the input terminal. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior of the input terminal.

Specifies the logic level behavior of the input terminal. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies the units to use to return two-edge separation measurements from the channel.

Specifies the units to use to return two-edge separation measurements from the channel. Use this enumeration to get or set the value of .

Seconds.

Timebase ticks.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the input line.

Specifies the logic level behavior on the input line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies on which edge of the first signal to start each measurement.

Specifies on which edge of the first signal to start each measurement. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies on which edge of the second signal to stop each measurement.

Specifies on which edge of the second signal to stop each measurement. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the units to use to return semi-period measurements.

Specifies the units to use to return semi-period measurements. Use this enumeration to get or set the value of .

Seconds.

Timebase ticks.

Units a custom scale specifies. If you select this value, you must specify a custom scale name.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies on which edge of the input signal to begin semi-period measurement. Semi-period measurements alternate between high time and low time, starting on this edge.

Specifies on which edge of the input signal to begin semi-period measurement. Semi-period measurements alternate between high time and low time, starting on this edge. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the units to use to return pulse specifications in terms of frequency.

Specifies the units to use to return pulse specifications in terms of frequency. Use this enumeration to get or set the value of .

Hertz.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies on which edge of the input signal to begin pulse measurement.

Specifies on which edge of the input signal to begin pulse measurement. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the units to use to return pulse specifications in terms of high time and low time.

Specifies the units to use to return pulse specifications in terms of high time and low time. Use this enumeration to get or set the value of .

Seconds.

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies on which edge of the input signal to begin pulse measurement.

Specifies on which edge of the input signal to begin pulse measurement. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the input terminal configuration.

Specifies the input terminal configuration. Use this enumeration to get or set the value of .

Differential.

Referenced Single-Ended.

Specifies the logic level behavior on the count reset line.

Specifies the logic level behavior on the count reset line. Use this enumeration to get or set the value of .

High logic.

Supply no excitation to the channel.

Specifies on which edge of the input signal to begin pulse measurement.

Specifies on which edge of the input signal to begin pulse measurement. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge.

Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Indicates the current state of the out terminal of the counter.

Indicates the current state of the out terminal of the counter. Use this enumeration to get or set the value of .

High state.

Low state.

Specifies the counter behavior when data is read but a new value was not detected during a sample clock.

Specifies the counter behavior when data is read but a new value was not detected during a sample clock. Use this enumeration to get or set the value of .

Repeat the last sample.

Return the sentinel value.

Specifies the data transfer mode for the channel.

Specifies the data transfer mode for the channel. Use this enumeration to get or set the value of .

Direct Memory Access. Data transfers take place independently from the application.

Data transfers take place independently from the application. Using interrupts increases CPU usage because the CPU must service interrupt requests. Typically, you should use interrupts if the device is out of DMA channels.

Data transfers take place when you call reading from the task or writing to the task.

Data transfers take place independently from the application using a USB bulk pipe.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer.

Specifies under what condition to transfer data from the onboard memory of the device to the buffer. Use this enumeration to get or set the value of .

Transfer data from the device when more than half of the onboard memory of the device fills.

Transfer data from the device when there is data in the onboard memory.

Transfer data from the device when the number of samples specified with are in the device FIFO.

Transfer data when the acquisition is complete.

Indicates how to define pulses generated on the channel.

Indicates how to define pulses generated on the channel. Use this enumeration to get or set the value of .

Generate pulses defined by the time the pulse is at a low state and the time the pulse is at a high state.

Generate digital pulses defined by frequency and duty cycle.

Generate digital pulses defined by the number of timebase ticks that the pulse is at a low state and the number of timebase ticks that the pulse is at a high state.

Specifies the resting state of the output terminal.

Specifies the resting state of the output terminal. Use this enumeration to get or set the value of .

High state.

Low state.

Specifies the units in which to define high and low pulse time.

Specifies the units in which to define high and low pulse time. Use this enumeration to get or set the value of .

Seconds.

Specifies the units in which to define pulse frequency.

Specifies the units in which to define pulse frequency. Use this enumeration to get or set the value of .

Hertz.

Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge.

Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Indicates the current state of the output terminal of the counter.

Indicates the current state of the output terminal of the counter. Use this enumeration to get or set the value of .

High state.

Low state.

Specifies constraints to apply when the counter generates pulses. Constraining the counter reduces the device resources required for counter operation. Constraining the counter can also allow additional analog or counter tasks on the device to run concurrently. For continuous counter tasks, NI-DAQmx consumes no device resources when the counter is constrained. For finite counter tasks, resource use increases with the frequency regardless of the constraint mode. However, fixed frequency constraints significantly reduce resource usage, and fixed duty cycle constraint marginally reduces it.

Specifies constraints to apply when the counter generates pulses. Constraining the counter reduces the device resources required for counter operation. Constraining the counter can also allow additional analog or counter tasks on the device to run concurrently. For continuous counter tasks, NI-DAQmx consumes no device resources when the counter is constrained. For finite counter tasks, resource use increases with the frequency regardless of the constraint mode. However, fixed frequency constraints significantly reduce resource usage, and fixed duty cycle constraint marginally reduces it. Use this enumeration to get or set the value of .

Counter has no restrictions on pulse generation.

Pulse frequency must be above 7.63 Hz and cannot change while the task runs. In this mode, the duty cycle has 8 bits of resolution.

Pulse frequency must be below 366.21 Hz and cannot change while the task runs. In this mode, the duty cycle has 16 bits of resolution.

Pulse duty cycle must be 50 percent. The frequency can change while the task runs.

Specifies the data transfer mode for the device. For buffered operations, use DMA or USB Bulk. For non-buffered operations, use Polled.

Specifies the data transfer mode for the device. For buffered operations, use DMA or USB Bulk. For non-buffered operations, use Polled. Use this enumeration to get or set the value of .

Direct Memory Access. Data transfers take place independently from the application.

Data transfers take place independently from the application. Using interrupts increases CPU usage because the CPU must service interrupt requests. Typically, you should use interrupts if the device is out of DMA channels.

Data transfers take place when you call reading from the task or writing to the task.

Data transfers take place independently from the application using a USB bulk pipe.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device.

Specifies under what condition to transfer data from the buffer to the onboard memory of the device. Use this enumeration to get or set the value of .

Transfer data to the device only when there is no data in the onboard memory of the device.

Transfer data to the device any time the onboard memory is less than half full.

Transfer data to the device any time the onboard memory of the device is not full.

Indicates the type of the virtual channel.

Indicates the type of the virtual channel. Use this enumeration to get or set the value of .

Analog input channel.

Analog output channel.

Digital input channel.

Digital output channel.

Counter input channel.

Counter output channel.

Specifies the action to take if the target loses its synchronization to the grand master.

Specifies the action to take if the target loses its synchronization to the grand master. Use this enumeration to get or set the value of .

Stop task and return an error.

Ignore the loss of synchronization and do nothing.

Indicates the polarity of the exported AI Convert Clock. The polarity is fixed and independent of the active edge of the source of the AI Convert Clock.

Indicates the polarity of the exported AI Convert Clock. The polarity is fixed and independent of the active edge of the source of the AI Convert Clock. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies whether the exported Sample Clock issues a pulse at the beginning of a sample or changes to a high state for the duration of the sample.

Specifies whether the exported Sample Clock issues a pulse at the beginning of a sample or changes to a high state for the duration of the sample. Use this enumeration to get or set the value of .

The exported Sample Clock pulses at the beginning of each sample.

The exported Sample Clock goes high at the beginning of the sample and goes low when the last AI Convert begins.

Specifies the polarity of the exported Sample Clock if is .

Specifies the polarity of the exported Sample Clock if is . Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Indicates the polarity of the exported Advance Trigger.

Indicates the polarity of the exported Advance Trigger. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the units of .

Specifies the units of . Use this enumeration to get or set the value of .

Seconds.

Specifies the active level of the exported Pause Trigger.

Specifies the active level of the exported Pause Trigger. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the polarity of the exported Reference Trigger.

Specifies the polarity of the exported Reference Trigger. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the polarity of the exported Start Trigger.

Specifies the polarity of the exported Start Trigger. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the polarity of the exported Advance Complete Event.

Specifies the polarity of the exported Advance Complete Event. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the polarity of an exported AI Hold Complete Event pulse.

Specifies the polarity of an exported AI Hold Complete Event pulse. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the polarity of an exported Change Detection Event pulse.

Specifies the polarity of an exported Change Detection Event pulse. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies whether the exported Counter Output Event pulses or changes from one state to the other when the counter reaches terminal count.

Specifies whether the exported Counter Output Event pulses or changes from one state to the other when the counter reaches terminal count. Use this enumeration to get or set the value of .

Send a pulse to the terminal.

Toggle the state of the terminal from low to high or from high to low.

Specifies the polarity of the pulses at the output terminal of the counter when is . NI-DAQmx ignores this property if is .

Specifies the polarity of the pulses at the output terminal of the counter when is . NI-DAQmx ignores this property if is . Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the initial state of the output terminal of the counter when is . The terminal enters this state when NI-DAQmx commits the task.

Specifies the initial state of the output terminal of the counter when is . The terminal enters this state when NI-DAQmx commits the task. Use this enumeration to get or set the value of .

High state.

Low state.

Specifies the output behavior of the Handshake Event.

Specifies the output behavior of the Handshake Event. Use this enumeration to get or set the value of .

Handshake Event deasserts after the Handshake Trigger asserts, plus the amount of time specified with .

Handshake Event pulses with the pulse width specified in .

Specifies the asserted level of the exported Handshake Event if is .

Specifies the asserted level of the exported Handshake Event if is . Use this enumeration to get or set the value of .

High state.

Low state.

Specifies the polarity of the exported Handshake Event if is .

Specifies the polarity of the exported Handshake Event if is . Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the active level of the exported Ready for Transfer Event.

Specifies the active level of the exported Ready for Transfer Event. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies when the ready for transfer event deasserts.

Specifies when the ready for transfer event deasserts. Use this enumeration to get or set the value of .

Deassert the signal when more than half of the onboard memory of the device fills.

Deassert the signal when the onboard memory fills.

Deassert the signal when the amount of space available in the onboard memory is below the value specified with .

Specifies the polarity of the exported Data Active Event.

Specifies the polarity of the exported Data Active Event. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the polarity of the exported Ready for Start Event.

Specifies the polarity of the exported Ready for Start Event. Use this enumeration to get or set the value of .

High state is the active state.

Low state is the active state.

Specifies the point in the buffer at which to begin a read operation. If you also specify an offset with , the read operation begins at that offset relative to the point you select with this property. The default value is unless you configure a Reference Trigger for the task. If you configure a Reference Trigger, the default value is .

Specifies the point in the buffer at which to begin a read operation. If you also specify an offset with , the read operation begins at that offset relative to the point you select with this property. The default value is unless you configure a Reference Trigger for the task. If you configure a Reference Trigger, the default value is . Use this enumeration to get or set the value of .

Start reading samples relative to the first sample acquired.

Start reading samples relative to the last sample returned by the previous read. For the first read operation, this position is the first sample acquired or the first pretrigger sample if you configured a reference trigger for the task.

Start reading samples relative to the first sample after the reference trigger occurred.

Start reading samples relative to the first pretrigger sample. You specify the number of pretrigger samples to acquire when you configure a reference trigger.

Start reading samples relative to the next sample acquired. For example, use this value and set to -1 to read the last sample acquired.

Specifies whether to overwrite samples in the buffer that you have not yet read.

Specifies whether to overwrite samples in the buffer that you have not yet read. Use this enumeration to get or set the value of .

When an acquisition encounters unread data in the buffer, the acquisition continues and overwrites the unread samples with new ones. You can read the new samples by setting to and setting to the appropriate number of samples.

The acquisition stops when it encounters a sample in the buffer that you have not read.

Specifies whether to enable logging and whether to allow reading data while logging. Log mode allows for the best performance. However, you cannot read data while logging if you specify this mode. If you want to read data while logging, specify Log and Read mode.

Specifies whether to enable logging and whether to allow reading data while logging. Log mode allows for the best performance. However, you cannot read data while logging if you specify this mode. If you want to read data while logging, specify Log and Read mode. Use this enumeration to get or set the value of .

Disable logging for the task.

Enable logging for the task. You cannot read data using reading from the task when using this mode. If you require access to the data, read from the TDMS file.

Enable both logging and reading data for the task. You must use reading from the task to read samples for NI-DAQmx to stream them to disk.

Specifies how to open the TDMS file.

Specifies how to open the TDMS file. Use this enumeration to get or set the value of .

Open an existing TDMS file, and append data to that file. If the file does not exist, NI-DAQmx returns an error.

Open an existing TDMS file, and append data to that file. If the file does not exist, NI-DAQmx creates a new TDMS file.

Create a new TDMS file, or replace an existing TDMS file.

Create a new TDMS file. If the file already exists, NI-DAQmx returns an error.

Specifies how reading from the task waits for samples to become available.

Specifies how reading from the task waits for samples to become available. Use this enumeration to get or set the value of .

Check for available samples when the system receives an interrupt service request. This mode is the most CPU efficient, but results in lower possible sampling rates.

Repeatedly check for available samples as fast as possible. This mode allows for the highest sampling rates at the expense of CPU efficiency.

Repeatedly check for available samples, but yield control to other threads after each check. This mode offers a balance between sampling rate and CPU efficiency.

Check for available samples once per the amount of time specified in .

Specifies the point in the buffer at which to write data. If you also specify an offset with , the write operation begins at that offset relative to this point you select with this property.

Specifies the point in the buffer at which to write data. If you also specify an offset with , the write operation begins at that offset relative to this point you select with this property. Use this enumeration to get or set the value of .

Write samples relative to the first sample.

Write samples relative to the current position in the buffer.

Specifies whether to allow NI-DAQmx to generate the same data multiple times.

Specifies whether to allow NI-DAQmx to generate the same data multiple times. Use this enumeration to get or set the value of .

Allow NI-DAQmx to regenerate samples that the device previously generated. When you choose this value, the write marker returns to the beginning of the buffer after the device generates all samples currently in the buffer.

Do not allow NI-DAQmx to regenerate samples the device previously generated. When you choose this value, NI-DAQmx waits for you to write more samples to the buffer or until the timeout expires.

Specifies how writing to the task waits for space to become available in the buffer.

Specifies how writing to the task waits for space to become available in the buffer. Use this enumeration to get or set the value of .

Repeatedly check for available buffer space as fast as possible. This mode allows for the highest sampling rates at the expense of CPU efficiency.

Repeatedly check for available buffer space, but yield control to other threads after each check. This mode offers a balance between sampling rate and CPU efficiency.

Check for available buffer space once per the amount of time specified in .

Specifies if a task acquires or generates a finite number of samples or if it continuously acquires or generates samples.

Specifies if a task acquires or generates a finite number of samples or if it continuously acquires or generates samples. Use this enumeration to get or set the value of .

Acquire or generate a finite number of samples.

Acquire or generate samples until you stop the task.

Acquire or generate samples continuously using hardware timing without a buffer. Hardware timed single point sample mode is supported only for the sample clock and change detection timing types.

Specifies the type of sample timing to use for the task.

Specifies the type of sample timing to use for the task. Use this enumeration to get or set the value of .

Acquire or generate samples on the specified edge of the sample clock.

Determine sample timing using burst handshaking between the device and a peripheral device.

Determine sample timing by using digital handshaking between the device and a peripheral device.

Configure only the duration of the task.

Acquire or generate a sample on each read or write operation. This timing type is also referred to as static or software-timed.

Acquire samples when a change occurs in the state of one or more digital input lines. The lines must be contained within a digital input channel.

Device acquires or generates samples on each sample clock edge, but does not respond to certain triggers until a few sample clock edges later. Pipelining allows higher data transfer rates at the cost of increased trigger response latency. Refer to the device documentation for information about which triggers pipelining affects. This timing type allows handshaking with some devices using the Pause trigger, the Ready for Transfer event, or the Data Active event. Refer to the device documentation for more information.

Specifies on which edge of a clock pulse sampling takes place. This property is useful primarily when the signal you use as the Sample Clock is not a periodic clock.

Specifies on which edge of a clock pulse sampling takes place. This property is useful primarily when the signal you use as the Sample Clock is not a periodic clock. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the action to take if Sample Clock edges occur faster than the device can handle them.

Specifies the action to take if Sample Clock edges occur faster than the device can handle them. Use this enumeration to get or set the value of .

Stop task and return an error.

NI-DAQmx ignores Sample Clock overruns, and the task continues to run.

Specifies the action to take when the onboard memory of the device becomes empty. In either case, the sample clock does not stop.

Specifies the action to take when the onboard memory of the device becomes empty. In either case, the sample clock does not stop. Use this enumeration to get or set the value of .

Stop generating samples and return an error.

Pause the task until samples are available in the FIFO.

Specifies on which edge to recognize a Sample Clock Timebase pulse. This property is useful primarily when the signal you use as the Sample Clock Timebase is not a periodic clock.

Specifies on which edge to recognize a Sample Clock Timebase pulse. This property is useful primarily when the signal you use as the Sample Clock Timebase is not a periodic clock. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the point in the handshake cycle that the device is in when the task starts.

Specifies the point in the handshake cycle that the device is in when the task starts. Use this enumeration to get or set the value of .

Device is waiting for space in the FIFO (for acquisition) or waiting for samples (for generation).

Device is waiting for the Handshake Trigger to assert.

Device is waiting for the Handshake Trigger to deassert.

Specifies on which edge of the Handshake Trigger an input task latches the data from the peripheral device.

Specifies on which edge of the Handshake Trigger an input task latches the data from the peripheral device. Use this enumeration to get or set the value of .

Latch data when the Handshake Trigger asserts.

Latch data when the Handshake Trigger deasserts.

Specifies the action to take when the onboard memory of the device becomes empty.

Specifies the action to take when the onboard memory of the device becomes empty. Use this enumeration to get or set the value of .

Stop generating samples and return an error.

Pause the task until samples are available in the FIFO.

Specifies on which edge of the clock pulse an analog-to-digital conversion takes place.

Specifies on which edge of the clock pulse an analog-to-digital conversion takes place. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the terminal of the signal to use as the AI Convert Clock Timebase.

Specifies the terminal of the signal to use as the AI Convert Clock Timebase. Use this enumeration to get or set the value of .

Use the same source as Sample Clock timebase.

Use the same source as the Master Timebase.

Use the onboard 100 MHz timebase.

Use the onboard 80 MHz timebase.

Use the onboard 20 MHz timebase.

Use the onboard 8 MHz timebase.

Specifies the units of .

Specifies the units of . Use this enumeration to get or set the value of .

Seconds.

Timebase ticks.

Specifies the type of sync pulse used in the task.

Specifies the type of sync pulse used in the task. Use this enumeration to get or set the value of .

Use the synchronization pulse type specified by the device.

Digital Edge synchronization.

Time synchronization.

Specifies the timescale to be used for timestamps for a sync pulse.

Specifies the timescale to be used for timestamps for a sync pulse. Use this enumeration to get or set the value of .

Use the host device.

Use the I/O device.

Specifies the timescale to be used for the first sample timestamp.

Specifies the timescale to be used for the first sample timestamp. Use this enumeration to get or set the value of .

Use the host device.

Use the I/O device.

Specifies how waits for the next Sample Clock pulse.

Specifies how waits for the next Sample Clock pulse. Use this enumeration to get or set the value of .

Check for Sample Clock pulses when the system receives an interrupt service request. This mode is the most CPU efficient, but results in lower possible sampling rates.

Repeatedly check for Sample Clock pulses as fast as possible. This mode allows for the highest sampling rates at the expense of CPU efficiency.

Specifies how NI-DAQmx attempts to recover after missing a Sample Clock pulse when performing counter writes.

Specifies how NI-DAQmx attempts to recover after missing a Sample Clock pulse when performing counter writes. Use this enumeration to get or set the value of .

Attempt to recover when the system receives an interrupt service request. This mode is the most CPU efficient and best suited for recovery at lower pulse train frequencies.

Repeatedly attempt to recover as fast as possible. This mode has the highest probability of recovery success at the expense of CPU efficiency.

Specifies the units of the values that you want to scale.

Specifies the units of the values that you want to scale. Use this enumeration to get or set the value of .

Volts.

Amperes.

Degrees Fahrenheit.

Degrees Celsius.

Degrees Rankine.

Kelvins.

Strain.

Ohms.

Hertz.

Seconds.

Meters.

Inches.

Degrees.

Radians.

Ticks.

Revolutions per minute.

Radians per second.

Degrees per second.

1 g is approximately equal to 9.81 m/s/s.

Meters per second per second.

Inches per second per second.

Meters per second.

Inches per second.

Pascals.

Newtons.

Pounds.

Kilograms-force.

Pounds per square inch.

Bar.

Newton meters.

Ounce-inches.

Pound-inches.

Pound-feet.

Volts per volt.

Millivolts per volt.

Coulombs.

PicoCoulombs.

Units defined by TEDS information associated with the channel.

Specifies the type of trigger to use to start a task.

Specifies the type of trigger to use to start a task. Use this enumeration to get or set the value of .

Trigger when an analog signal signal crosses a threshold.

Trigger when any of the configured analog signals cross their respective thresholds.

Trigger on the rising or falling edge of a digital signal.

Trigger when digital physical channels match a digital pattern.

Trigger when an analog signal enters or leaves a range of values. The range is in the units of the measurement.

Trigger when a specified time is reached.

Disable triggering for the task.

Specifies the start trigger timestamp timescale.

Specifies the start trigger timestamp timescale. Use this enumeration to get or set the value of .

Use the host device.

Use the I/O device.

Specifies the units of .

Specifies the units of . Use this enumeration to get or set the value of .

Complete periods of the Sample Clock.

Seconds.

Timebase ticks.

Specifies on which edge of a digital pulse to start acquiring or generating samples.

Specifies on which edge of a digital pulse to start acquiring or generating samples. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies whether the Start Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with .

Specifies whether the Start Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with . Use this enumeration to get or set the value of .

Trigger when the physical channels match the specified pattern.

Trigger when the physical channels do not match the specified pattern.

Specifies on which slope of the trigger signal to start acquiring or generating samples.

Specifies on which slope of the trigger signal to start acquiring or generating samples. Use this enumeration to get or set the value of .

Trigger on the rising slope of the signal.

Trigger on the falling slope of the signal.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. Use this enumeration to get or set the value of .

Alternating Current.

Direct Current.

Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. Use this enumeration to get or set the value of .

Trigger on the rising slope of the signal.

Trigger on the falling slope of the signal.

Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. Use this enumeration to get or set the value of .

Alternating Current.

Direct Current.

Specifies whether the task starts acquiring or generating samples when the signal enters or leaves the window you specify with and .

Specifies whether the task starts acquiring or generating samples when the signal enters or leaves the window you specify with and . Use this enumeration to get or set the value of .

Trigger when the signal enters the window.

Trigger when the signal leaves the window.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. Use this enumeration to get or set the value of .

Alternating Current.

Direct Current.

Specifies the timescale to be used for timestamps used in a time trigger.

Specifies the timescale to be used for timestamps used in a time trigger. Use this enumeration to get or set the value of .

Use the host device.

Use the I/O device.

Specifies the type of trigger to use to mark a reference point for the measurement.

Specifies the type of trigger to use to mark a reference point for the measurement. Use this enumeration to get or set the value of .

Trigger when an analog signal signal crosses a threshold.

Trigger when any of the configured analog signals cross their respective thresholds.

Trigger on the rising or falling edge of a digital signal.

Trigger when digital physical channels match a digital pattern.

Trigger when an analog signal enters or leaves a range of values. The range is in the units of the measurement.

Trigger when a specified time is reached.

Disable triggering for the task.

Specifies the reference trigger timestamp timescale.

Specifies the reference trigger timestamp timescale. Use this enumeration to get or set the value of .

Use the host device.

Use the I/O device.

Specifies on what edge of a digital pulse the Reference Trigger occurs.

Specifies on what edge of a digital pulse the Reference Trigger occurs. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies whether the Reference Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with .

Specifies whether the Reference Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with . Use this enumeration to get or set the value of .

Trigger when the physical channels match the specified pattern.

Trigger when the physical channels do not match the specified pattern.

Specifies on which slope of the source signal the Reference Trigger occurs.

Specifies on which slope of the source signal the Reference Trigger occurs. Use this enumeration to get or set the value of .

Trigger on the rising slope of the signal.

Trigger on the falling slope of the signal.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. Use this enumeration to get or set the value of .

Alternating Current.

Direct Current.

Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. Use this enumeration to get or set the value of .

Trigger on the rising slope of the signal.

Trigger on the falling slope of the signal.

Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.

Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty. Use this enumeration to get or set the value of .

Alternating Current.

Direct Current.

Specifies whether the Reference Trigger occurs when the source signal enters the window or when it leaves the window. Use and to specify the window.

Specifies whether the Reference Trigger occurs when the source signal enters the window or when it leaves the window. Use and to specify the window. Use this enumeration to get or set the value of .

Trigger when the signal enters the window.

Trigger when the signal leaves the window.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. Use this enumeration to get or set the value of .

Alternating Current.

Direct Current.

Specifies the type of Handshake Trigger to use.

Specifies the type of Handshake Trigger to use. Use this enumeration to get or set the value of .

Use the Handshake Trigger as a control signal for asynchronous handshaking, such as 8255 handshaking.

Start the measurement or generation immediately when you start the task.

Specifies the asserted level of the Handshake Trigger.

Specifies the asserted level of the Handshake Trigger. Use this enumeration to get or set the value of .

High state.

Low state.

Specifies the type of trigger to use to pause a task.

Specifies the type of trigger to use to pause a task. Use this enumeration to get or set the value of .

Pause the measurement or generation while an analog signal is above or below a level.

Pause the measurement or generation while an analog signal is either inside or outside of a range of values.

Pause the measurement or generation while a digital signal is at either a high or low state.

Pause the measurement or generation while digital physical channels either match or do not match a digital pattern.

Do not pause the measurement or generation.

Specifies whether the task pauses above or below the threshold you specify with .

Specifies whether the task pauses above or below the threshold you specify with . Use this enumeration to get or set the value of .

Pause the measurement or generation while the signal is above the threshold.

Pause the measurement or generation while the signal is below the threshold.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel. Use this enumeration to get or set the value of .

Alternating Current.

Direct Current.

Specifies whether the task pauses while the trigger signal is inside or outside the window you specify with and .

Specifies whether the task pauses while the trigger signal is inside or outside the window you specify with and . Use this enumeration to get or set the value of .

Pause the measurement or generation while the trigger is inside the window.

Pause the measurement or generation while the signal is outside the window.

Specifies the coupling for the source signal of the terminal if the source is a terminal rather than a virtual channel.

Specifies the coupling for the source signal of the terminal if the source is a terminal rather than a virtual channel. Use this enumeration to get or set the value of .

Alternating Current.

Direct Current.

Specifies whether the task pauses while the signal is high or low.

Specifies whether the task pauses while the signal is high or low. Use this enumeration to get or set the value of .

High state.

Low state.

Specifies if the Pause Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with .

Specifies if the Pause Trigger occurs when the physical channels specified with match or differ from the digital pattern specified with . Use this enumeration to get or set the value of .

Trigger when the physical channels match the specified pattern.

Trigger when the physical channels do not match the specified pattern.

Specifies the type of trigger to use to arm the task for a Start Trigger. If you configure an Arm Start Trigger, the task does not respond to a Start Trigger until the device receives the Arm Start Trigger.

Specifies the type of trigger to use to arm the task for a Start Trigger. If you configure an Arm Start Trigger, the task does not respond to a Start Trigger until the device receives the Arm Start Trigger. Use this enumeration to get or set the value of .

Trigger on a rising or falling edge of a digital signal.

Trigger when a specified time is reached.

Disable the trigger.

Specifies the arm start trigger timestamp timescale.

Specifies the arm start trigger timestamp timescale. Use this enumeration to get or set the value of .

Use the host device.

Use the I/O device.

Specifies on which edge of a digital signal to arm the task for a Start Trigger.

Specifies on which edge of a digital signal to arm the task for a Start Trigger. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).

Specifies the timescale to be used for timestamps used in an arm start time trigger.

Specifies the timescale to be used for timestamps used in an arm start time trigger. Use this enumeration to get or set the value of .

Use the host device.

Use the I/O device.

Specifies the role of the device in a synchronized system. Setting this value to or enables trigger skew correction. If you enable trigger skew correction, set this property to on only one device, and set this property to on the other devices.

Specifies the role of the device in a synchronized system. Setting this value to or enables trigger skew correction. If you enable trigger skew correction, set this property to on only one device, and set this property to on the other devices. Use this enumeration to get or set the value of .

Disables trigger skew correction.

Device is the source for shared clocks and triggers.

Device uses clocks and triggers from the master device.

Specifies the state to which to set the digital physical channels when the watchdog task expires. You cannot modify the expiration state of dedicated digital input physical channels.

Specifies the state to which to set the digital physical channels when the watchdog task expires. You cannot modify the expiration state of dedicated digital input physical channels. Use this enumeration to get or set the value of NationalInstruments.DAQmx.Watchdog.DOExpirationState.

Logic high.

Logic low.

High-impedance state. You can select this state only on devices with bidirectional lines. You cannot select this state for dedicated digital output lines. On some devices, you can select this value only for entire ports.

Do not change the state of the lines. On some devices, you can select this value only for entire ports.

Specifies the output type of the analog output physical channels when the watchdog task expires.

Specifies the output type of the analog output physical channels when the watchdog task expires. Use this enumeration to get or set the value of NationalInstruments.DAQmx.Watchdog.AOExpirationStateType.

Voltage output.

Current output.

Expiration does not affect the port. Do not change the state of any lines in the port, and do not lock the port.

Specifies the state to set the counter output channel terminal when the watchdog task expires.

Specifies the state to set the counter output channel terminal when the watchdog task expires. Use this enumeration to get or set the value of NationalInstruments.DAQmx.Watchdog.COExpirationState.

Low logic.

High logic.

Expiration does not affect the state of the counter output. The channels retain their states at the time of the watchdog timer expiration, and no further counter generation runs.

Specifies the type of trigger to use to expire a watchdog task.

Specifies the type of trigger to use to expire a watchdog task. Use this enumeration to get or set the value of .

Trigger on a rising or falling edge of a digital signal.

Trigger when a specified time is reached.

Disable the trigger.

Specifies on which edge of a digital signal to expire the watchdog task.

Specifies on which edge of a digital signal to expire the watchdog task. Use this enumeration to get or set the value of .

Rising edge(s).

Falling edge(s).