Communication Module Indicators 175
Chapter 5 Fault and Alarm Indicators
CM Status Indicators
The CM status indicators identify the processing state for the CM.
A fault light indicates that the processor has an internal fault.
Normal States
Pass Fault Active Lock Description Action
Green
steady
No
light
Green
steady
No
light
Module is operating normally. Normal status. No action is
required.
Green
steady
No
light
Green
blinking
No
light
Module is downloading
firmware.
Normal status. To cancel, pull
module then re-seat module.
Green
steady
No
light
No light No
light
Module is operating normally.
Possible conditions include:
Control application has not
been loaded into the MP.
Load control application.
Control application has been
loaded into the MP, but has not
been started up.
Start control application.
Module has just been installed
and is currently being educated
by the other MPs.
Wait for module to be
educated.
Fault States
Pass Fault Active Lock Description Action
No
light
Red
steady
No light No
light
Possible conditions include:
Module may have failed.
See mode indicator status for
power-up states.
Module may be in the process
of power-up self-test.
If the Pass indicator does not
go on within five minutes,
replace module.
No
light
Red
steady
Green
steady
No
light
Module has detected a minor
error.
Module is operational, but
should be replaced.
No
light
Red
steady
—
1
Red
steady
Module is unlocked from the
baseplate.
Lock module.
Green
steady
Red
steady
— — Indicators/signal circuitry on
the module are malfunctioning.
Replace the module.
1. This symbol ( — ) means the indicator is not important for this condition.
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