Published: April 17, 2015
Message Queue doesn't propagate from active to backup redundant controller
Problem affects: Firmware, all versions
If you are using SNAP PAC S-series controllers as redundant controllers (with the SNAP-PAC-ROK redundancy option kit), errors placed in the Message Queue of the active controller are not propagated to the backup controller. If there is a switch to the backup, any queued errors are lost.
Use an error handling chart with sync blocks to pull errors from the Message Queue and write them to a persistent string table. When a sync block is executed, changes to the persistent string table will be propagated to the backup.
Opto 22 is investigating this issue.
Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
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