Drive: Motor blocked

What does F07900 mean?

The motor has been operating at its torque limit for an extended period while remaining below a defined speed threshold, indicating a mechanical blockage or severe overload. This could also be caused by speed oscillations at the controller limit or thermal derating of the power unit. Continued operation in this state can lead to motor overheating, mechanical damage, or damage to the drive.

Complete Troubleshooting Guide

1. 1

   Physically inspect the motor and mechanical load to ensure the motor can rotate freely without obstruction.

2. 2

   Review the configured torque limits (r1538, r1539) to ensure they are appropriate for the application and not set too low.

3. 3

   Adjust parameters p2175 (Motor locked speed threshold) and p2177 (Motor locked delay time) if they are incorrectly set for the application, but only after ruling out mechanical issues.