8546

Category: Alarm

Cause

1. Incorrect servo motor U,V,W wiring
2. Excessive position command frequency or acceleration
3. The excessive position deviation alarm value (Pn520) is low for the operating conditions
4. Servo unit fault

Corrective action

1. Check the motor and encoder cables for poor contact or other problems.
2. Try reducing command pulse frequency and run again. Reduce position command pulse frequency or command acceleration, or adjust the electronic gear ratio. Try reducing command acceleration and run again. Add a smoothing function such as the position command acceleration/deceleration time constant (Pn216).
3. Confirm whether the excessive position deviation alarm value (Pn520) is appropriate; set parameter Pn520 correctly.
4. Turn on power again. If the alarm persists, the servo unit may be faulty. Replace the servo unit.