GFK-0467K Appendix B Interpreting Fault Tables B-5
B
Fault Action
Each fault may have one of three actions associated with it. These fault actions are fixed on the
Series 90-30 PLC and cannot be changed by the user.
Table B-2. PLC Fault Actions
Fault Action Action Taken by CPU Code
Informational Log fault in fault table. 1
Diagnostic Log fault in fault table.
Set fault references. 2
Fatal Log fault in fault table.
Set fault references.
Go to STOP mode.
3
Error Code
The error code further describes the fault. Each fault group has its own set of error codes. Table B-
3 shows error codes for the PLC Software Error Group (Group 87H).
Table B-3. Alarm Error Codes for PLC CPU Software Faults
Decimal Hexadecimal Name
20 14 Corrupted PLC Program Memory.
39 27 Corrupted PLC Program Memory.
82 52 Backplane Communications Failed.
90 5A User Shut Down Requested.
All others PLC CPU Internal System Error.