GE 90-30/20/Micro manual Symbolic Fault Specific Data, Fault Actions for Specific Faults

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.	2
	Set fault references.
Fatal	Log fault in fault table.	3
	Set fault references.
	Go to STOP mode.

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	Circuit is an input – tristate.
	2	Circuit is an input.
	3	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.

GFK-0467K Appendix B Interpreting Fault Tables B-11