Overspeed

¿Qué significa oS ?

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.

• Incorrect encoder feedback pulse setting (e.g., parameter P2-01) for the motor's PG.
• Motor mechanical load decoupled (e.g., broken belt, shaft shear) leading to motor runaway.
• Aggressive speed control loop tuning (e.g., P1-10, P1-11) causing overshoot during transients.
• External speed command (analog input or fieldbus) exceeding the drive's maximum output frequency.
• PG (Pulse Generator) feedback cable damage or shielding fault causing noisy or erroneous speed signals.

Haga clic en los pasos para seguir su progreso.

1. 1

   Verify parameter P2-01 (Pulse Generator Feedback Pulses) matches the actual encoder's PPR (Pulses Per Revolution).

2. 2

   Inspect motor shaft and mechanical coupling for integrity and ensure load is properly connected.

3. 3

   Monitor parameter U1-02 (Motor Speed Feedback) to confirm actual rotational speed during acceleration.

4. 4

   Adjust P1-10 (Proportional Gain) and P1-11 (Integral Gain) in small increments to stabilize the speed control loop.

5. 5

   Inspect the PG feedback cable connections at terminals S1/S2/S3 (or equivalent) for tightness and shielding effectiveness.

6. 6

   Confirm the maximum speed reference from the external controller is scaled correctly for the drive's output frequency.