KB84696
Published: April 17, 2015
Revision: 1.0

Message Queue doesn't propagate from active to backup redundant controller


Applies To:

SNAP-PAC-S1
SNAP-PAC-S1-FM
SNAP-PAC-S1-W
SNAP-PAC-S2
SNAP-PAC-S2-W

Versions Affected:

Problem affects: Firmware, all versions


Symptoms:

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.

Workaround:

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.

Resolution:

Opto 22 is investigating this issue.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com


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