during controller redundancy, if i switch off primary controller, the controller status from primary will changeover to secondary immediately. but after switching on the primary controller, the synchronisation is not happening. Status of the controller will toggle frequently from secondary to primary for 3-4 mins. During this time there will be no communication and the plant will trip.
Line Redundancy is enabled in Engg.Cross cable for Switch and controller are connected. kindly let me know the correct solution to proceed with.
Hello, The best course of action here is to open a support case.
One comment though. Why is the single CPU tryining to switch over to the newly switched on old primary? That should not happen, as there is no preferred primary. Maybe your single controller also has a problem?