Cause : Acceleration Error comes when the motor did not accelerate for the specified acceleration time or torque limit when motoring is too low (L7-01 and L7-02).

1. The load was too high during Rotational Auto-Tuning.
2. Increase the acceleration time (C1-01).
3. Disconnect the machine from the motor if possible.
4. Check L7-01 and L7-02 settings.
5. Increase the setting.
6. Disconnect the motor from machine and restart Auto-Tuning. If motor and load cannot be uncoupled make sure the load is lower than 30%.
7. If a mechanical brake is installed, make sure it is fully lifted during tuning.