Okuma Alarm A-1094 – PLC Backup Data File Read Error
Alarm A-1094 indicates that the CNC control cannot read the PLC backup data file from memory.
The PLC backup data is either missing, corrupted, or inaccessible.
As a result, the control cannot properly restore PLC parameters during startup.
Common causes include:
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Corrupted PLC backup file
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Memory or storage failure
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Power interruption during data write
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Battery-related SRAM data loss
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Incomplete software update
The machine may not operate correctly until the PLC data is restored.
Recommended actions:
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Verify the PLC backup file in memory.
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Reload PLC data from a valid backup.
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Check memory device integrity.
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Inspect control battery condition.
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Restart the system after restoring data.
If no valid backup exists, PLC parameters must be reloaded from machine documentation or manufacturer data.
