Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 223)

Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 223
Troubleshoot a Redundant System Chapter 9
To resolve this anomaly, check the intermodule cable that connects the
redundancy modules. Verify that it is properly connect and is not severed.
Also, if the Auto-Synchronization parameter of this system is not set to always,
use the commands in the Synchronization tab to synchronize that chassis once
the anomaly is resolved.
Redundancy Module Missing To determine if a missing redundancy module caused a state change and
switchover, access the Event Log of the chassis that is currently the primary
chassis.
Figure 65 - Event Log with Partner RM Screamed Event
The Partner RM Screamed event is logged by the redundancy module just before
it is disconnected. Depending on cause of the missing module, the Partner RM
Screamed event may not be logged before the module is lost.
Last normal event
logged.
RM Screamed event indicates
module removal.
Dimmed secondary
chassis log indicates
issue with redundancy
module.
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