7310 Overspeed Fault in ABB ACS880 Drive

7310 Overspeed in the ABB ACS880 Drive indicates that the motor speed has exceeded the maximum allowable speed limit configured for the drive. The ACS880 continuously monitors the actual motor speed using either motor feedback devices (closed-loop control) or estimated motor speed (sensorless control). If the motor speed exceeds the configured overspeed threshold, the drive generates Fault 7310 to protect the motor, mechanical equipment, and drive from damage caused by excessive rotational speed.

This fault may occur due to incorrect speed parameter settings, insufficient braking torque, load changes during torque control, or inaccurate speed estimation in sensorless operation.

Possible Causes

  • Maximum motor speed exceeds the configured limit.
  • Incorrect Parameter 30.11 – Minimum Speed setting.
  • Incorrect Parameter 30.12 – Maximum Speed setting.
  • Insufficient motor braking torque.
  • Excessive regenerative energy during deceleration.
  • Sudden reduction in mechanical load.
  • Incorrect use of torque control mode.
  • Load overrunning the motor.
  • Brake chopper or brake resistor not installed where required.
  • Brake chopper or brake resistor undersized.
  • Incorrect estimated motor speed in sensorless control.
  • Faulty motor current measurement.
  • Incomplete or incorrect ID run.
  • Reduced or Standstill ID run used instead of a Normal or Advanced ID run.
  • Faulty motor speed feedback device (closed-loop applications).
  • Incorrect motor parameters.
  • Mechanical failure causing uncontrolled acceleration.
  • Internal current measurement hardware fault.

Solutions

  • Cycle power to the drive and check whether the fault clears.
  • Verify Parameter 30.11 – Minimum Speed.
  • Verify Parameter 30.12 – Maximum Speed.
  • Ensure the configured speed limits match the motor and application requirements.
  • Inspect the application for sudden load changes.
  • Verify adequate motor braking torque.
  • Check whether torque control is appropriate for the application.
  • Install or verify the brake chopper and brake resistor if regenerative braking is required.
  • Inspect the brake resistor for proper operation.
  • Verify the motor current measurement is operating correctly.
  • Perform a Normal, Advanced, or Advanced Standstill ID Run.
  • Avoid using a Reduced or Standstill ID Run if accurate speed estimation is required.
  • Review Parameter 99.13 – ID Run Requested.
  • Verify motor parameters and feedback configuration.
  • Inspect the motor and driven equipment for mechanical problems.
  • Contact ABB technical support if the fault persists after inspection.

Additional Information

The ABB ACS880 continuously supervises motor speed to ensure that the motor operates within safe mechanical and electrical limits.

The drive determines motor speed using either:

  • Motor feedback devices (encoder, resolver, etc.) in closed-loop control.
  • Estimated motor speed using motor current and voltage measurements in sensorless control.

If the measured or estimated speed exceeds the configured maximum allowable speed, the drive immediately generates Fault 7310.

This fault commonly occurs when:

  • Speed limits are configured incorrectly.
  • The application has insufficient braking capability.
  • The motor is operating in torque control and the mechanical load suddenly decreases.
  • The drive cannot accurately estimate motor speed because of an incomplete or unsuitable ID Run.

ABB recommends performing a Normal, Advanced, or Advanced Standstill ID Run when accurate sensorless speed estimation is required. A Reduced or Standstill ID Run may not provide sufficient motor model accuracy for demanding applications.

The drive also recommends checking the motor current measurement, since inaccurate current measurements can result in incorrect speed estimation and unnecessary overspeed trips.

Common Symptoms

  • Drive trips with Fault 7310.
  • Motor accelerates beyond the configured speed limit.
  • Fault occurs during rapid deceleration or load changes.
  • Overspeed fault appears during torque control.
  • Fault occurs in sensorless operation.
  • Motor speed display exceeds the configured maximum.
  • Drive repeatedly trips during high-inertia applications.
  • Unexpected acceleration after load removal.
  • Fault appears after motor replacement or parameter changes.
  • Drive stops to protect the motor and mechanical equipment.

Recommended Troubleshooting Sequence

  1. Cycle power to the drive.
  2. Verify Parameter 30.11 – Minimum Speed.
  3. Verify Parameter 30.12 – Maximum Speed.
  4. Confirm the configured speed limits match the motor specifications.
  5. Check for sudden load changes or overrunning loads.
  6. Verify adequate motor braking torque.
  7. Evaluate whether torque control is appropriate for the application.
  8. Inspect the brake chopper and brake resistor if regenerative braking is required.
  9. Verify the motor current measurement.
  10. Review motor parameter settings.
  11. Perform a Normal, Advanced, or Advanced Standstill ID Run.
  12. Review Parameter 99.13 – ID Run Requested.
  13. Inspect the motor feedback system (if used).
  14. Inspect the driven equipment for mechanical faults.
  15. Contact ABB technical support if the fault persists.

Overspeed Check Table

Check PointAction
Power cycleRestart the drive
Parameter 30.11Verify Minimum Speed setting
Parameter 30.12Verify Maximum Speed setting
Speed limitsConfirm correct application settings
Mechanical loadCheck for sudden load reduction
Braking torqueVerify adequate braking capability
Torque controlConfirm suitability for the application
Brake chopperVerify proper operation if installed
Brake resistorInspect condition and sizing
Motor current measurementVerify correct operation
Parameter 99.13Perform the recommended ID Run
Motor parametersVerify configuration
Motor feedbackInspect encoder or resolver if applicable
ABB technical supportContact if the fault remains after inspection

Preventive Maintenance Tips

  • Verify minimum and maximum speed settings during commissioning.
  • Perform a Normal or Advanced ID Run whenever the motor or drive configuration changes.
  • Avoid using a Reduced or Standstill ID Run for demanding sensorless applications unless specifically recommended.
  • Periodically inspect the brake chopper and brake resistor in regenerative applications.
  • Monitor motor current measurements for abnormal readings.
  • Ensure the motor is correctly sized for the application and maximum operating speed.
  • Review torque control settings whenever the process or load characteristics change.
  • Inspect mechanical transmission components for conditions that could cause overspeed.
  • Keep firmware updated according to ABB recommendations.
  • Record recurring overspeed faults to assist long-term diagnostics.

Proper verification of Parameters 30.11 – Minimum Speed, 30.12 – Maximum Speed, and 99.13 – ID Run Requested, along with routine inspection of the braking system, motor current measurement, and motor control configuration, will help prevent recurring 7310 Overspeed faults in ABB ACS880 drives, ensuring accurate speed regulation, reliable braking performance, and long-term protection of the motor, drive, and driven equipment.

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