GFK-0467K B-1

Interpreting Fault Tables

The Series 90-30 PLCs maintain two fault tables, the I/O fault table for faults generated by I/O
devices (including I/O controllers) and the PLC fault table for internal PLC faults. The information
in this appendix will enable you to interpret the message structure format when reading these fault
tables. Both tables contain similar information.
• The PLC fault table contains:
o Fault location.
o Fault description.
o Date and time of fault.
• The I/O fault table contains:
o Fault location.
o Reference address.
o Fault category.
o Fault type.
o Date and time of fault.
B
Appendix