Cause : Error counter over flow comes when the servo drive's internal error counter has reached its maximum value, signifying a high frequency of errors. This could be due to various issues within the servo system. The value of the position error counter is over 227 (134217728).

"alarm 29" in panasonic servo drive indicate "Error counter over flow". This means the internal error counter has exceeded its allowable limit. This typically happens when there are repeated or continuous errors during operation, suggesting an underlying issue that is not being resolved.

1. Check that the motor operates per the position command pulse.
2. See the torque monitor to check that the output torque does not get saturated.
3. Readjust the gains. Maximize the value of Pr5E (torque limit set-up).
4. Correct the encoder wiring per the wiring diagram.