Overspeed

What does F025 mean?

For the ATV310 drive, this fault indicates that the motor or application is operating at a speed significantly higher than expected, exceeding the drive's configured limits, potentially more than 10% above the Top frequency (parameter 308). This can be caused by control instability, high inertia loads, or incorrect speed loop parameters.

• Instability in the speed control loop or application mechanics
• Overspeed associated with the inertia of the application, especially during deceleration
• Motor operating more than 10% above the configured Top frequency (parameter 308)
• Incorrectly tuned parameters of the speed loop (e.g., gain and stability settings)

Click steps to track your progress.

1. 1

   Check the motor operation and physical condition for any issues contributing to overspeed.

2. 2

   Adjust the Top frequency (parameter 308) if the motor is consistently operating more than 10% above its current setting, ensuring it matches application requirements.

3. 3

   Add a braking resistor to the drive, if not already present, to dissipate regenerative energy during deceleration and prevent overvoltage.

4. 4

   Check the sizing of the motor, drive, and load to ensure they are appropriate for the application's speed and inertia demands.

5. 5

   Review and re-tune the parameters of the speed loop (gain and stability) to ensure stable operation and prevent oscillations.