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GFK-0467K Chapter 3 Fault Explanation and Correction 3-11
3
Option Module Software Failure
The Fault Group Option Module Software Failure occurs when a non-recoverable software
failure occurs on a PCM or ADC module. The fault action for this group is Fatal.
Error Code:
All
Name:
COMMREQ Frequency Too High
Description:
COMMREQs are being sent to a module faster than it can process them.
Correction:
Change the PLC program to send COMMREQs to the affected module
at a slower rate.
Program Block Checksum Failure
The Fault Group Program Block Checksum Failure occurs when the PLC CPU detects error
conditions in program blocks received by the PLC. It also occurs when the PLC CPU detects
checksum errors during power-up verification of memory or during RUN mode background
checking. The fault action for this group is Fatal.
Error Code:
All
Name:
Program Block Checksum Failure
Description:
The PLC Operating Software generates this error when a program block is
corrupted.
Correction:
(1) Clear PLC memory and retry the store.
(2) Display the PLC fault table on the programmer. Contact GE Fanuc
PLC Field Service, giving them all the information contained in the
fault entry.
Low Battery Signal
The Fault Group Low Battery Signal occurs when the PLC CPU detects a low battery on the PLC
power supply or a module, such as the PCM, reports a low battery condition. The fault action for
this group is Diagnostic.
Error Code:
0
Name:
Failed Battery Signal
Description:
The CPU module (or other module having a battery) battery is dead.
Correction:
Replace the battery. Do not remove power from the rack.
Error Code:
1
Name:
Low Battery Signal
Description:
A battery on the CPU, or other module has a low signal.
Correction:
Replace the battery. Do not remove power from the rack.