how to reset panasonic servo absolute encoder

To reset a Panasonic servo absolute encoder (clearing alarm AL.450 or 451),

replace the battery first with control power ON. Then, use the front panel to navigate to Pr0.0E (Absolute Encoder Setup), set it to 6 (clear encoder), and restart the drive. If the encoder data is corrupted, clear the alarm via the parameter settings or software

Step-by-Step Reset Procedure:

1. Replace Battery: Ensure the servo driver control power is ON to prevent losing data. Replace the battery if voltage is low.
2. Access Parameter Menu: On the servo drive front panel, press the S key, then use the M key to find the parameter setting mode.
3. Navigate to Absolute Encoder Setup: Find Pr 0.0E (or Pr00E).
4. Clear Encoder: Change the value of Pr0.0E to 6 (or 0006) to initiate the absolute encoder clear/reset.
5. Save and Restart: Hold down the S key to save, then cycle the main power to the driver (turn off and on).
6. Verify: The alarm should be gone. You may need to perform a machine zero return (homing) operation to set the new absolute position