Overspeed

What does 7310 mean?

The motor is rotating at a speed exceeding its configured maximum allowed speed. This can be caused by incorrect speed limits, insufficient braking capacity, or changes in mechanical load under torque control. Uncontrolled overspeed can cause severe mechanical damage to the motor or connected machinery and poses a safety risk.

• Incorrect maximum speed limit parameter setting (e.g., P30-10 Max speed) configured below actual operational requirements.
• Insufficient braking torque capacity or failure of the dynamic braking resistor (e.g., open circuit in R- resistor, P30-07 braking chopper).
• Sudden reduction in mechanical load on an overhauling application (e.g., vertical lift with decreasing weight).
• Drive control loop instability (e.g., P20-04 speed controller proportional gain too high) leading to speed overshoot.
• Faulty speed feedback device providing erroneous high speed readings (e.g., encoder counts inconsistent).

Click steps to track your progress.

1. 1

   Check parameter P30-10 (Max speed) and ensure it is set correctly for the application's maximum allowed speed.

2. 2

   Verify the integrity and sizing of the dynamic braking resistor (e.g., measure resistance) and the braking chopper (Parameter P30-07 operation).

3. 3

   Monitor actual motor speed (Parameter P01-01) and reference speed (Parameter P01-02) during operation to identify speed transients.

4. 4

   Review and adjust speed controller tuning parameters (e.g., P20-04, P20-05) to improve stability and prevent overshoot.

5. 5

   If using an encoder, verify encoder feedback accuracy by comparing actual speed with an independent measurement (e.g., handheld tachometer).