Okuma Alarm P-0971 – Cache Data Initialization Error

Alarm P-0971 indicates that an error occurred during the initialization of internal cache data in the CNC control system.

This alarm appears when the control fails to properly load or verify temporary memory data during startup or system reset.

Common causes include:

• Corrupted system cache data

• Incomplete software update

• Memory initialization failure

• PLC or CNC software inconsistency

• Power interruption during startup

The control blocks further operation to prevent unstable system behavior.

Recommended actions:

1. Restart the machine completely (power OFF → wait → power ON).

2. Check for additional related alarms.

3. Verify system software version.

4. Reload system data from backup if available.

5. Inspect control memory hardware if the issue persists.

If the alarm reappears repeatedly, a deeper CNC software or hardware diagnosis is required.