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Rockwell Automation Publication 1756-RM010C-EN-P - August 2018
Chapter 2
Replacement Considerations
5. For each module, verify that the Electronic Keying is set to Compatible
Module or Disable Keying.
6. In the RSLinx® Classic software, start the RMCT for the redundancy
module in either chassis.
7. On the Configuration tab, from the Auto-Synchronization pull-down
menu, choose Never.
8. Click Apply.
9. On the Synchronization tab, click Disqualify Secondary.