Allen-Bradley 1756-CNB User Manual page 60

60 Configure the System Redundancy Module
Action
2. Start a switchover.
3. Monitor the synchronization progress.
Publication 1756-UM523F-EN-P - December 2006
Details
A. Click Synchronization.
B. Choose Initiate Switchover and then choose Yes to continue.
A. Click Synchronization Status.
If the controller contains a large project, the system may spend some time
synchronizing the secondary controller.
B. If the Secondary Readiness remains Disqualified:
• Make sure the Auto-Synchronization option = Always.
• See Find the Cause of a Switchover or Disqualification on page 104.