Overspeed

What does OS mean?

This fault is triggered when the motor's actual speed exceeds a pre-set overspeed detection level (F1-08) for a specified time (F1-09). This can occur due to an incorrectly set speed reference, loss of load, a faulty speed feedback device, or the motor being driven externally by the load. Sustained overspeed can cause mechanical damage to the motor and coupled equipment.

Complete Troubleshooting Guide

1. 1

   Verify the motor's speed feedback device (encoder/PG) is functioning correctly and securely mounted.

2. 2

   Check the speed reference command for stability and accuracy, ensuring it is not commanding an excessively high speed.

3. 3

   Adjust parameters F1-08 (Overspeed Detection Level) and F1-09 (Overspeed Detection Time) if the current settings are too sensitive for the application.

4. 4

   Inspect the mechanical load for any conditions that might cause the motor to overspeed (e.g., runaway load).

5. 5

   Perform a functional test of the motor at various speeds to confirm expected behavior.