Er.620 - Motor Overload

Fault Code Description: Er.620 indicates that the servo motor is overheating and the load has exceeded the motor’s capacity. This error is typically caused by incorrect wiring in motor cables, excessive load, improper gain settings, or mechanical obstructions.

Causes:

    Incorrect or loose connections in motor and encoder cables:
- There may be improper or loose connections between the motor and encoder cables.

    Load is too heavy:
- The motor is continuously operating above its nominal torque capacity.

    Frequent acceleration/deceleration or high load inertia ratio:
- The load inertia ratio may exceed the motor’s torque capacity, leading to motor overload.

    Incorrect gain settings:
- Improper gain settings may cause the motor to operate with too much stiffness, leading to vibrations.

    Incorrect servo drive or motor model settings:
- Incorrect settings for the servo drive or motor model may cause motor overload.

    Locked rotor due to mechanical issues:
- The motor may stop working due to mechanical blockage.

    Servo drive malfunction:
- A hardware fault in the servo drive could cause the motor overload error.

Troubleshooting and Solutions:

    Incorrect or loose connections in motor and encoder cables:
- Troubleshooting Method: Check the motor and encoder connections according to the correct wiring diagram.
- Solution: Reconnect the cables according to the proper wiring diagram. Use standard cables provided by Inovance if possible.

    Load is too heavy:
- Troubleshooting Method: Verify the overload characteristics of the motor and servo drive. Check if the average load ratio (H0B-12) exceeds 100%.
- Solution: Replace the drive with a larger servo drive and compatible motor. Reduce the load and increase the acceleration/deceleration time.

    Frequent acceleration/deceleration or high load inertia ratio:
- Troubleshooting Method: Calculate the load inertia ratio or use the automatic tuning feature to check H08-15 (load inertia ratio).
- Solution: Increase the acceleration/deceleration time.

    Incorrect gain settings:
- Troubleshooting Method: Observe if the motor vibrates or produces noise during operation.
- Solution: Adjust the gain settings according to "Section 6: Tuning."

    Incorrect servo drive or motor model settings:
- Troubleshooting Method: For IS620P series products, check the motor model in H00-05 and the servo drive model in H01-02.
- Solution: Correct the servo drive model setting (H01-02) and use the appropriate motor model.

    Locked rotor due to mechanical issues:
- Troubleshooting Method: Check the motor speed and operating references using the servo software or keypad.
- Solution: Remove the mechanical obstructions.

    Servo drive malfunction:
- Troubleshooting Method: Restart the servo drive. If the error persists, there may be a fault in the drive.
- Solution: Replace the servo drive.

Summary: Er.620 occurs due to motor overload. To resolve this error, check the wiring, load, acceleration/deceleration times, and gain settings. If the issue persists, verify the servo drive and motor model settings and remove any mechanical obstructions.

Er.625 - Brake Applied Abnormally

Fault Code Description: Er.625 indicates that when the motor brake is applied, the motor is not providing the required torque. In this case, the output torque is less than 70% of the gravitational load, and the brake protection signal is active while the input reference is at zero.

Cause:

    Motor brake is not released:
- The motor brake may not be functioning correctly, or the brake switch may be damaged.

Troubleshooting and Solutions:

    Motor brake is not released:
- Troubleshooting Method: Check if the motor brake signal is active and whether the brake switch is damaged.
- Solution: Reconnect the cables or replace the motor.

Er.626 - Brake Released Abnormally

Fault Code Description: Er.626 indicates that while brake protection is active, the motor has rotated two revolutions when the brake output signal is not engaged.

Cause:

    Motor brake is released:
- The motor brake may not be functioning properly, or the brake switch may be damaged.

Troubleshooting and Solutions:

    Motor brake is released:
- Troubleshooting Method: Check if the motor brake signal is active and whether the brake switch is damaged.
- Solution: Reconnect the cables or replace the motor.

Summary: Both error codes indicate abnormal behavior of the motor brake. To resolve these errors, check the brake signal and switch. If necessary, reconnect the cables or replace the motor.

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