KB86826
Published: December 12, 2023
Revision: 1.0

Backup controller status rapidly cycles in PAC Redundancy Manager after strategy is downloaded and started


Applies To:

PAC Redundancy Manager

Versions Affected:

R9.6a to current


Symptoms:

This issue only occurs with a large PAC Control strategy configured with many I/O units where the strategy does not have any Sync blocks.

After downloading and starting the strategy to a backup SNAP PAC controller, you may encounter the Status (via Arbiter) field rapidly cycling through the following states in PAC Redundancy Manager:

  • Qualified Backup
  • Non-Qualified Backup
  • Non-Qualified Backup (I/O Impaired)
  • Online (Candidate)

Workaround:

Add Sync blocks to the strategy, or wait for the initial controller synchronization to occur before starting the recently downloaded strategy.

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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