Velocity limit S-0-0091 exceeded

What does F8079 mean?

The motor's actual velocity has exceeded the limit defined by parameter S-0-0091 (Maximum Velocity). This fault occurs when the drive detects the motor spinning faster than permitted, potentially due to external forces, incorrect control, or an encoder misread.

• External forces driving the motor beyond the commanded speed (e.g., regenerative load).
• Incorrectly set S-0-0091 parameter, too low for the application.
• Inaccurate encoder feedback indicating a higher speed than actual.
• Control loop instability or incorrect speed command.

Click steps to track your progress.

1. 1

   Verify the S-0-0091 parameter setting; ensure it is appropriate for the application and motor's maximum safe speed.

2. 2

   Check for external mechanical forces that might be overdriving the motor.

3. 3

   Inspect the motor encoder for correct operation and signal integrity; check for noise or damage to the encoder or cable.

4. 4

   Review the speed command source and ensure it is not erroneously commanding a higher speed.

5. 5

   Consider re-tuning the speed control loop to ensure stable operation and prevent overshooting the velocity limit.