Rockwell Automation Publication 1756-UM004C-EN-P - June 2021 33
Chapter 3 Connect Redundant EtherNet/IP Adapters
6. If you have one of the following modules in your chassis, Select Time
Sync and Motion.
• 1756-IB16IF
• 756-OB16IEF
• 1756-OB16IEFS
When a chassis is configured for a 1756-EN4TR redundant adapter pair
and the I/O chassis contains any of the preceding modules, then the
1756-EN4TR modules must be configured as Time Sync and Motion or
unexpected connection drops can occur.
7. Power the adapters, and the synchronization process starts. Once
synchronization has completed, one adapter reports as PwQS and the
other adapter reports as QS. This status displays on the adapter.
The adapter that reports as QS has an IP address that was incremented
by one, which was incremented by the firmware in the module.
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