Table of Contents
Advertisement
LED Name
Description
MERR
Main CPU
Error Logger Status LED
Bicolor LED (Red, Green)
RST
Reset LED
Bicolor LED (Red, Green)
MCOM
Main CPU
Communication LED
Bicolor LED (Red, Green)
Status
OFF – No new errors or warnings logged in
main CPU.
Green – New message logged.
Orange – New warning logged.
Red – New error logged.
Note: In systems with I/O expansion, all error
messages from I/O expansion frames are
periodically collected by the main CPU and
saved with the main frame error messages.
When an error message is logged in either the
main frame or I/O expansion frames, the ERR
LED is lit on the main CPU front panel and
the MERR LEDs are lit on all expansion
modules. When the messages are cleared, the
ERR/MERR LED(s) are turned off.
Green – On startup
OFF – Successful power-up or restart.
Red – Power-up or restart failed.
Red – Slow blink – Expansion Loader looking
for main CPU (discovery).
Red – Fast blink – Expansion Loader loading
image.
Red – Expansion module firmware initializing
image.
Green – Slow blink - Expansion module
registered with main CPU.
Green – Fast blink – Expansion module
ready. (If this occurs after connection was
established – solid green, it is a sign that the
Expansion module is disconnected from the
main CPU.)
Green – Solid – Expansion module
connected.
17-12
Expansion Module
Advertisement
Table of Contents
