Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 221)

Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 221
Troubleshoot a Redundant System Chapter 9
4. Use the time of the switchover event found in the primary chassis to
identify the corresponding event in the secondary chassis.
The switchover indicated in the primary chassis log occurred at 10:27:08.
The corresponding events in the secondary chassis log indicate that the
network is not attached and that the SYS_FAIL_LActive backplane signal
is active. Both these events indicate an error in the connection of the
ControlNet module to the network.
5. Confirm the ControlNet connection error by browsing the network in
RSLinx Classic software.
Secondary Chassis Event Log
2
2
2
2
This node is no longer
connected.
An attempt to access the
secondary RMCT fails and this
error is indicated.
2
2
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