Filter
Top Products
GFK-0467K Appendix B Interpreting Fault Tables B-11
B
I/O Fault Action
The fault action specifies what action the PLC CPU should take when a fault occurs. Table B-11
lists possible fault actions.
Table B-11. I/O 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
I/O Fault Specific Data
An I/O fault table entry may contain up to 5 bytes of I/O fault specific data.
Symbolic Fault Specific Data
Table B-12 lists data that is required for block circuit configuration.
Table B-12. I/O Fault Specific Data
Decimal Number Hex Code Description
Circuit Configuration
1
2
3
Circuit is an input – tristate.
Circuit is an input.
Circuit is an output.
Fault Actions for Specific Faults
Forced/unforced circuit faults are reported as informational faults. All others are diagnostic or
fatal.
The model number mismatch, I/O type mismatch and non-existent I/O module faults are reported in
the PLC fault table under the System Configuration Mismatch group. They are not reported in the
I/O fault table.