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GFK-0467K Appendix B Interpreting Fault Tables B-7
B
Fault Extra Data
This field contains details of the fault entry. An example of what data may be present are:
Four of the error codes in the System Configuration Mismatch group supply fault
extra data:
Table B-5. PLC Fault Data - Illegal Boolean Opcode Detected
Fault Extra Data Model Number Mismatch
[0] ISCP Fault Register Contents
[1] Bad OPCODE
[2,3] ISCP Program Counter
[4,5] Function Number
For a RAM failure in the PLC CPU (one of the faults reported as a PLC CPU
hardware failure), the address of the failure is stored in the first four bytes of the
field.
PLC Fault Time Stamp
The six-byte time stamp is the value of the system clock when the fault was recorded
by the PLC CPU. (Values are coded in BCD format.)
Table B-6. PLC Fault Time Stamp
Byte Number Description
1
2
3
4
5
6
Seconds
Minutes
Hours
Day of the month
Month
Year
Corrupted
User RAM
Group:
PLC CPU
Hardware
Failure
(RAM
Failure):