Rockwell Automation T3122 ICS Regent Processor Modules - Manual (Page 7)

Processor Modules (T3110, 11, 12, 20, 21, and 22)
P D - 6 0 0 0 M a r - 0 6
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occurs the red COMM indicator turns on and the green
COMM indicator turns off.
I/O Indicator
This red and green LED pair indicates the overall health of
the system’s I/O. During normal operation the green I/O
indicator is on. If an I/O fault occurs the red I/O indicator
turns on and the green indicator turns off.
An I/O module failure causes all of the processor modules to
indicate an I/O fault. An I/O transceiver module, I/O power
supply module, or I/O Safetybus cable fault causes only the
associated processor module to indicate an I/O fault.
Run Indicator
This green LED is off if the Regent has cold-started (system
power-up without 2oo3 validated programs). After the
RAMcode is loaded the Run LED flashes slowly (about ½
Hertz). With at least one program loaded and running this
indicator will flash faster (about 2 Hertz).
The RUN indicator will be on steadily when an application
program scan exceeds the maximum allowable scan time
(approximately 200 milliseconds for the 128 kbyte modules,
and 400 milliseconds for the 512 kbyte modules).
Battery Indicator
The green BATT OK indicator shows whether the module’s
battery has sufficient power to maintain the programs in the
processor. If the battery has adequate power, this LED will be
on. If the battery needs to be replaced this LED will be off (see
Maintenance, page 9).
Memory Lock Indicator
This green LED indicates whether the module’s memory lock
keyswitch is in the on or off position. The MEMLK indicator
will be green when the keyswitch is in the on position.
The system’s memory lock status is voted: If at least two
processor modules are locked, the system is memory locked, if
at least two processor modules are unlocked, the system
memory is unlocked.