D100 Torque Prove Fault in ABB ACS880 Drive

D100 Torque Prove in the ABB ACS880 Drive indicates that the drive was unable to produce sufficient motor torque during the Torque Proving sequence. Torque Proving is performed during startup to verify that the motor can develop enough torque before normal operation begins. If the required torque cannot be established, the drive generates Fault D100 to prevent unreliable motor operation.

This fault generally indicates a problem with the motor magnetization settings, motor wiring, motor parameters, or the Torque Proving configuration, rather than a failure of the drive itself.

One of the most common causes is an incorrect Start Mode or an insufficient Magnetization Time, preventing the motor from developing the required magnetic flux before torque verification.

Possible Causes

• Insufficient motor torque during Torque Proving.
• Incorrect Parameter 21.01 – Start Mode.
• Parameter 21.01 – Start Mode not set to Const Time.
• Parameter 21.02 – Magnetization Time set too short.
• Incorrect motor magnetization.
• Incorrect motor parameter settings.
• Incorrect motor data in Parameter Group 99 – Motor Data.
• Loose or damaged motor power cables.
• Incorrect motor wiring.
• High resistance in motor cable connections.
• Motor not fully magnetized before startup.
• Mechanical load too high during Torque Proving.
• Motor shaft mechanically locked.
• Low incoming supply voltage.
• Faulty motor.
• Faulty drive output stage.

Solutions

• Cycle power to the drive and check whether the fault clears.
• Verify Parameter 21.01 – Start Mode is set to Const Time.
• Increase Parameter 21.02 – Magnetization Time to an appropriate value.
• Verify all motor nameplate data in Parameter Group 99 – Motor Data.
• Inspect the motor and motor cables for damage.
• Check all motor cable connections for loose terminals.
• Verify correct motor wiring.
• Ensure the motor shaft rotates freely.
• Remove excessive mechanical load if possible during commissioning.
• Verify adequate incoming supply voltage.
• Repeat the Torque Proving procedure.
• Perform a Motor ID Run if recommended after correcting motor parameters.
• Replace damaged motor cables if necessary.
• Replace the motor if a motor fault is confirmed.
• Contact ABB technical support if the fault persists after inspection.

Additional Information

The ABB ACS880 performs Torque Proving to confirm that the motor can generate sufficient torque before allowing normal operation. This function is commonly used in applications where reliable motor starting is critical, such as hoists, cranes, elevators, and other safety-related systems.

Before torque can be developed, the motor must be properly magnetized. The drive controls this process using:

• Parameter 21.01 – Start Mode
• Parameter 21.02 – Magnetization Time

ABB recommends the following settings for Torque Proving:

• 21.01 – Start Mode = Const Time
• 21.02 – Magnetization Time = An appropriate value based on the motor and application

If the magnetization period is too short, the motor may not establish sufficient magnetic flux, preventing it from producing the required torque during the proving sequence.

The fault may also occur if the motor cables are incorrectly wired, the motor parameters are inaccurate, or the motor shaft is mechanically restricted.

Unlike a Motor Stall fault, D100 Torque Prove occurs before normal motor operation, during the startup verification process.

Common Symptoms

• Drive trips with Fault D100.
• Motor fails to start.
• Startup sequence stops during Torque Proving.
• Motor produces little or no torque.
• Drive repeatedly fails during commissioning.
• Fault appears immediately after a start command.
• Motor may briefly energize but fails to accelerate.
• Hoisting or lifting applications fail to release the brake.
• Fault remains after reset until the underlying problem is corrected.
• Drive cannot complete the startup sequence.

Recommended Troubleshooting Sequence

1. Cycle power to the drive.
2. Verify Parameter 21.01 – Start Mode is set to Const Time.
3. Check Parameter 21.02 – Magnetization Time and increase it if necessary.
4. Verify all motor data in Parameter Group 99 – Motor Data.
5. Inspect the motor and motor cables.
6. Check motor cable terminals for secure connections.
7. Verify correct motor wiring.
8. Ensure the motor shaft rotates freely.
9. Remove excessive mechanical load if possible.
10. Verify adequate incoming supply voltage.
11. Perform a Motor ID Run if recommended.
12. Repeat the Torque Proving procedure.
13. Replace damaged motor cables or the motor if necessary.
14. Verify successful startup.
15. Contact ABB technical support if the fault persists.

Torque Prove Check Table

Check Point	Action
Power cycle	Restart the drive
Parameter 21.01	Verify Start Mode = Const Time
Parameter 21.02	Increase Magnetization Time if necessary
Parameter Group 99	Verify Motor Data values
Motor	Inspect for electrical or mechanical faults
Motor cables	Inspect for damage
Motor cable terminals	Tighten loose connections
Motor wiring	Verify correct connections
Motor shaft	Ensure it rotates freely
Mechanical load	Reduce if excessive during commissioning
Supply voltage	Verify stable incoming power
Motor ID Run	Perform if recommended
ABB technical support	Contact if the fault remains after inspection

Preventive Maintenance Tips

• Verify Parameter 21.01 – Start Mode is correctly configured before commissioning.
• Set Parameter 21.02 – Magnetization Time according to the motor size and application requirements.
• Enter accurate motor nameplate data in Parameter Group 99 – Motor Data.
• Perform a successful Motor ID Run before operating demanding applications.
• Inspect motor cables and terminals during scheduled maintenance.
• Ensure the motor shaft rotates freely before startup.
• Avoid excessive mechanical loading during commissioning.
• Periodically inspect incoming power quality and supply voltage.
• Use only ABB-recommended parameter settings for Torque Proving applications.
• Record recurring Torque Proving faults to assist long-term diagnostics.

Proper verification of Parameter 21.01 – Start Mode, correct adjustment of Parameter 21.02 – Magnetization Time, accurate motor data in Parameter Group 99 – Motor Data, and routine inspection of the motor, motor cables, and mechanical load will help prevent recurring D100 Torque Prove faults in ABB ACS880 drives, ensuring reliable motor magnetization, successful torque verification, dependable startup, and long-term operation of the drive system.