M580 FDR_server alarm

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Hello,
I recently encountered an issue with a redundant Modicon M580 PLC system (BMEP586040) — an FDR Server alarm was triggered. The system had been running stably and without issues for a long time.

The alarm occurred after a power outage affecting one of the CPUs. The switchover to the backup controller worked correctly, but once power was restored and the original CPU came back online, the FDR Server alarm appeared.

No changes were made to the controller’s configuration or program prior to the incident. I’ve reviewed the documentation, but unfortunately, I couldn’t find detailed information about this specific alarm.

I would appreciate any assistance in diagnosing and resolving the issue.

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M580 FDR_server alarm

M580 FDR_server alarm

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