User Manual Owner's manual

Publication 1785-UM024B-EN-P - January 2003
5-2 Monitoring and Troubleshooting Your ControlNet PLC-5 Hot Backup System
ControlNet PLC-5
Backup-Specific Major
Fault Error Codes
The PLC-5 processor stores major fault codes in word 12 of the
processor status file (S:12). The following table lists new major fault
codes specific to the ControlNet Hot Backup processor and the
suggested corrective action for each.
If you see fault
code:
Which indicates this fault: Take this corrective action:
230 System attempted transition to Run mode with
processor in Invalid backup state.
Change from the Invalid backup state to the No Control
backup state before transitioning into Run mode. Refer to
the Invalid backup state troubleshooting table later in this
chapter.
231 Bypassed qualification (may occur during race
condition when both processors attempt to go into
Run mode at the same time).
Transition the PLC-5 processors into Run mode one at a
time.
232 Both processors attempted to be primaries. Check all media for broken cables, loose connectors,
missing terminators, etc.
233 ControlNet configuration invalid on transition into
Run mode.
Reconfigure the ControlNet channel.
234 Failed Qualification. Refer to the qualification major faults troubleshooting
table later in this chapter.
235 Illegal invalid backup state Cycle power to the processor. If the fault reoccurs, contact
Rockwell Automation Technical Support at 440-646-6800
236 Illegal No Control backup state Cycle power to the processor. If the fault reoccurs, contact
Rockwell Automation Technical Support at 440-646-6800
237 Illegal Primary/Secondary backup state Cycle power to the processor. If the fault reoccurs, contact
Rockwell Automation Technical Support at 440-646-6800
238 Incompatible firmware revisions Install the same series and revision of firmware into both
hot backup PLC-5 processors
239 ControlNet keeper mismatch Use RSNetworx to make the PLC-5 processor a valid
keeper
ATTENTION
!
The processor does not invoke the fault routine
for any of the new fault codes for the ControlNet
PLC-5 backup system since they are
non-recoverable faults.