I have Compact Logix L33ER processor for Hot Backup Redundancy Purpose in WTP application. Iam using Flexlogix 1794-OB16 DO outputs.
Flex adapter for IO communication.
Iam trying for Soft Redundancy from main processor to peer and peer to main processor .
During Switchover from Main to Peer and Peer to main Processor, the DOs are cut off.
While in the middle of the process if the Switchover of PLC happens due to failure of Main or Peer PLC, if the DOs are cut off, Should i Start the process sequence logic from beginning?
I tried configuring the DO properties of Communication Fail Behavior in output modules properties as "Hold Last Output but still the DOS are cut off during switchover.
Then also Iam facing the problem of DO cutoff whle switchover. Iam having same program and IO configuration in main and peer plc generated through HotBackup tool.
Please let me know if there is any way to Prevent DO cutoff while switchover . Also in Panelview HMI iam using 2 screens for Main and Peer PLC. While switchover the screens in HMI are showing in boxes.