Torque limit

What does 12 mean?

The motor torque has exceeded the programmed limits in parameter 4-16 (Motor Mode) or 4-17 (Generator Mode). This can be caused by excessive load, rapid acceleration/deceleration, or incorrect limit settings. Persistent torque limiting can hinder application performance or cause unexpected stops.

• Actual motor torque exceeding the maximum torque limit set in parameter P4-16 (Torque Limit Motor Mode).
• Actual motor regenerative torque exceeding the limit set in parameter P4-17 (Torque Limit Generator Mode).
• Sudden increase in mechanical load on the motor shaft, causing a torque demand beyond the configured limit.
• Acceleration or deceleration ramp times (P3-41, P3-42) set too aggressively for the system's inertia and torque capabilities.

Click steps to track your progress.

1. 1

   Monitor the drive's actual torque output (e.g., using LCP display 16-10) and compare it to the limits set in P4-16 and P4-17.

2. 2

   Increase the maximum torque limit in parameter P4-16 (Torque Limit Motor Mode) or P4-17 (Torque Limit Generator Mode) to accommodate peak loads if mechanically acceptable.

3. 3

   Increase acceleration ramp time P3-41 (Ramp Up Time 1) and/or deceleration ramp time P3-42 (Ramp Down Time 1) to reduce peak torque demands.

4. 4

   Mechanically inspect the driven equipment for binding, obstructions, or excessive friction that could cause high torque requirements.