Torque limit

What does 12 mean?

The motor's actual torque has exceeded the value set in either parameter 4-16 (Torque Limit Motor Mode) or 4-17 (Torque Limit Generator Mode). This is a protective function to prevent mechanical damage to the driven equipment or instability in the control system.

• Actual motor torque exceeding the set limit in parameter P4-16 (Torque Limit Motor Mode) or P4-17 (Torque Limit Generator Mode).
• Mechanical binding or obstruction in the driven load requiring torque above the set limit to overcome.
• Incorrectly set torque limits, too low for the application's normal operating demands or peak starting torque.
• Sensorless vector control miscalculating motor torque due to inaccurate motor parameters (P1-04 to P1-06).
• Rapid acceleration/deceleration ramp times (P1-02, P1-03) causing transient torque peaks to exceed the limit.

Click steps to track your progress.

1. 1

   Monitor the drive's actual output torque (e.g., Parameter P0-06) and compare it against the set torque limits P4-16 and P4-17.

2. 2

   Increase the torque limit parameters (P4-16, P4-17) to a value suitable for the application's peak torque requirements.

3. 3

   Inspect the mechanical system for any physical obstructions, tight bearings, or excessive friction that could cause high torque demand.

4. 4

   Verify the accuracy of motor nameplate data (P1-04 to P1-06) entered into the drive's configuration.

5. 5

   Increase acceleration and deceleration ramp times (P1-02, P1-03) to reduce the rate of change of torque during speed changes.