Cause : PM Rotor Position Estimation Error comes when an invalid value resulted from Initial Pole Search or Motor characteristics have changed.

1. Parameters that control Initial Pole Search are set incorrectly (set up may be incomplete).
2. Parameters for the motor encoder are set to the wrong values (set up may be incomplete).
3. Repeat the setup process.
4. Perform Stationary Auto-Tuning or Initial Pole Search Auto-Tuning.
5. Brake was released during Initial Pole Search or during power loss.
6. Check the brake sequence.
7. The brake must remain applied during Initial Pole Search and whenever the power supply is interrupted.
8. Initial Pole Search cannot be performed on the motor being used.
9. Use a PG option card that is compatible with both the drive and an absolute encoder