Q How do I configure the system so that the SIAM application utilizes the correct IP interface?

A: The 'hostname' command must be configured such that it resolves to the correct IP interface. For example if the ppp interface is to be utilized instead of the ethernet interface, you must set hostname to return either the ppp's IP address, or a name that resolves to that address (/etc/hosts could be used to map from name to IP address).

Q: How do I put the sidearm into single-user mode?

A: Get into the bootloader and issue the following boot command:
  IBoot> boot "console=ttySA0 cpufreq=191700 root=1f04 rw S"

The 'S' at the end tells our version of init to go into single user mode, which invokes a root login command:

  Loading modules:
  Setting the System Clock using the Hardware Clock as reference...
  Give root password for maintenance
  (or type Control-D for normal startup): ******
  sh-2.03#

Enter the standard root password, and you then should have a prompt.

Q: How do I interpret the LEDs on a DPA channel?

A: Using the silk screen on the back to identify the light:

Ch1 and Ch2 (amber)
485 - channel communication configured for RS-485
232 - channel communication configured for RS-232
These two are mutually exclusive

Over Curr (red) - The Electronic circuit breaker has been tripped. Channel
must be turned off before it can be reenergize

Instr 12V (green) - Indicator showing power applied to instrument connection.
+3.3 - Communications 3.3V power is on.

COM (green) - When illuminated the communications ground is tied common with the
instrument ground.

System
SYS +3.3 (amber) - indication of the main 3.3v power from the backplane.

Q: How are sidearm serial ports named?

A: Standard serial ports are named as follows:

Console port - /dev/ttySA0

Synchronous serial port - /dev/ttySA1

Debug port - /dev/ttySA2

Instrument backplane serial ports - /dev/ttySX0 through /dev/ttySX11

RF modem/transceiver port 0 - /dev/ttySX13 (RFIO connector closest to edge of sidearm)

RF modem/transceiver port 1 - /dev/ttySX12

Uplink RS-485 port - /dev/ttySX14

MSP-430 - /dev/ttySX15

Q: The portal log shows all instrument packets as "null" - what's going on?

A: This is a symptom of the MMC's FLASH memory being full. You must stop the application, remove the log files, and restart.

Q: How do use HyperTerm as the MMC console? Editors like 'emacs' and 'vi' scramble the HyperTerm output!

A: After logging into the MMC with HyperTerm, set the TERM environment variable to 'ansi' and issue command 'stty sane'.