7310 Overspeed Fault in ABB ACS560 Drive

7310 Overspeed in the ABB ACS560 Drive indicates that the motor speed has exceeded the maximum permitted operating speed. The drive continuously monitors motor speed to protect the motor and driven equipment. If the actual motor speed exceeds the configured overspeed limit, the drive generates Fault 7310 and stops the motor to prevent mechanical damage.

This fault generally indicates a problem with the speed settings, braking capability, load conditions, or torque control configuration, rather than a hardware fault in the drive.

Possible Causes

• Maximum motor speed exceeded.
• Incorrect Minimum Speed (30.11) setting.
• Incorrect Maximum Speed (30.12) setting.
• Insufficient motor braking torque.
• Load driving the motor faster than the commanded speed.
• Incorrect use of torque control mode.
• Rapid deceleration of a high-inertia load.
• Brake chopper not installed where regenerative braking is required.
• Brake resistor missing, disconnected, or faulty.
• Regenerative energy exceeding the drive's braking capability.
• Incorrect motor parameter settings.
• Improper commissioning or application setup.

Solutions

• Check Parameter 30.11 – Minimum Speed.
• Check Parameter 30.12 – Maximum Speed.
• Verify that the configured speed limits match the application requirements.
• Check whether the motor has sufficient braking torque.
• Verify that torque control is appropriate for the application.
• Determine whether a brake chopper and brake resistor are required.
• Inspect the brake resistor and its wiring if installed.
• Check for overrunning loads that may drive the motor above its speed limit.
• Correct any application or parameter issues.
• Reset the fault and verify normal drive operation.

Additional Information

The ABB ACS560 continuously monitors the motor speed during operation.

Fault 7310 is generated when the motor speed exceeds the configured overspeed limit.

According to ABB, common causes include:

• Incorrect minimum or maximum speed settings.
• Insufficient braking torque.
• Changes in load while operating in torque control mode.
• Lack of regenerative braking capability.

Unlike a Motor Feedback Fault, 7310 Overspeed indicates that the drive has detected an actual motor speed higher than the allowable limit, rather than a loss of speed feedback.

Applications with high-inertia loads or overhauling loads may require a properly sized brake chopper and brake resistor to safely dissipate regenerative energy during deceleration.

Common Symptoms

• Drive displays 7310 Overspeed.
• Motor trips during deceleration.
• Fault occurs when stopping a high-inertia load.
• Motor speed exceeds the commanded value.
• Fault appears during torque control operation.
• Drive stops to protect the motor.
• Overspeed occurs on overrunning loads.
• Fault clears after correcting the speed or braking configuration.
• Motor cannot maintain the commanded speed.
• Drive resumes normal operation after the fault is reset.

Recommended Troubleshooting Sequence

1. Verify that the fault is 7310 Overspeed.
2. Check Parameter 30.11 – Minimum Speed.
3. Check Parameter 30.12 – Maximum Speed.
4. Confirm the configured speed limits match the motor and application.
5. Verify the motor has adequate braking torque.
6. Review the torque control configuration if used.
7. Determine whether the load is overrunning the motor.
8. Check whether a brake chopper is required.
9. Inspect the brake resistor and its wiring.
10. Correct any parameter or application issues.
11. Reset the fault.
12. Restart the drive.
13. Verify the motor speed remains within the configured limits.
14. Monitor operation during acceleration and deceleration.
15. Contact ABB technical support if the fault persists.

7310 Overspeed Check Table

Check Point	Action
Parameter 30.11	Verify Minimum Speed setting
Parameter 30.12	Verify Maximum Speed setting
Speed limits	Confirm they match the application
Motor braking torque	Ensure adequate braking capability
Torque control	Verify it is appropriate for the application
Brake chopper	Install or verify operation if required
Brake resistor	Inspect connection and condition
Load conditions	Check for overrunning or regenerative loads
Drive operation	Verify normal speed after correction
ABB technical support	Contact if the fault remains after inspection

Preventive Maintenance Tips

• Verify 30.11 and 30.12 during commissioning.
• Use appropriate speed limits for the motor and driven equipment.
• Install a correctly sized brake chopper and brake resistor for regenerative applications.
• Periodically inspect brake resistor wiring and terminals.
• Verify braking performance during preventive maintenance.
• Avoid sudden deceleration of high-inertia loads where possible.
• Confirm torque control settings after application changes.
• Back up drive parameters after successful commissioning.
• Monitor motor speed trends for abnormal conditions.
• Record recurring 7310 Overspeed faults to assist long-term diagnostics.

Proper verification of Parameters 30.11 (Minimum Speed) and 30.12 (Maximum Speed), motor braking torque, torque control configuration, brake chopper, brake resistor, and load conditions will help prevent recurring 7310 Overspeed faults in ABB ACS560 drives, ensuring safe motor operation, reliable speed control, effective regenerative braking, and dependable long-term performance of the drive system.