Motor Torque Limit

What does FF85 mean?

The drive is actively limiting motor torque based on the calculated motor pull-out torque limit and the minimum/maximum torque limits defined by parameters 20.13 (MIN TORQ SEL) and 20.14 (MAX TORQ SEL). This is an informative alarm (programmable Fault Function 30.23, bit 3: MOT_TORQ_LIM_IND) indicating the drive is operating at its configured torque boundaries.

• Motor output torque has exceeded its configured limit (P4-02).
• Excessive load or stall condition applied to the motor shaft.
• Mechanical binding or jamming in the driven equipment.
• Control loop instability causing transient torque spikes.

Click steps to track your progress.

1. 1

   Check parameter 20.13 (MIN TORQ SEL) and 20.14 (MAX TORQ SEL) settings to ensure they are appropriate for the application.

2. 2

   Review Fault Function parameters, specifically 30.23 (LIMIT WARNING), which activates this alarm, to understand its configuration.

3. 3

   If LIMIT WORD 1 bit 0 (TORQ MOTOR LIM) is active, verify motor parameter settings in group 99 (START-UP DATA) and confirm that an ID run has been completed successfully.