Overspeed

What does oS mean?

This fault signals that the motor is operating at an excessively high speed, which can be caused by overshoot during acceleration/deceleration, incorrect PG (Pulse Generator) pulse settings in the drive, or an improperly configured overspeed detection level. Uncontrolled overspeed can lead to severe mechanical failure, component damage, and potential safety hazards for personnel and equipment.

Complete Troubleshooting Guide

1. 1

   Adjust the ASR (Automatic Speed Regulator) parameters: Decrease C5-01 [ASR Proportional Gain 1] and simultaneously increase C5-02 [ASR Integral Time 1] to optimize speed control and reduce overshoot.

2. 2

   If using a pulse train input, carefully calibrate the pulse train gain using parameters H6-02 to H6-05 to ensure accurate speed feedback.

3. 3

   Verify and correct the number of PG pulses configured in the drive by setting H6-02 [Terminal RP Frequency Scaling] to the pulse train frequency corresponding to 100% maximum motor speed.

4. 4

   Fine-tune the overspeed detection settings by adjusting F1-08 [Overspeed Detection Level] and F1-09 [Overspeed Detection Delay Time] to accurately reflect the application's safe operating limits and avoid false trips.