Schneider Electric 17S Series User Manual

82

Troubleshooting, continued

Problems, 
Possible Causes 
and Corrective 
Actions, 
continued

Motor oscillates

- Gain too high (speed controller).

- Shielding in feedback cable has
  a break.

- Reduce Kp (speed controller).

- Replace feedback cable.

Poor drive 
performance 
(drive too soft)

- Kp (speed controller) too low.

- Tn (speed controller) too high.

- PID-T2 too high.

- T-Tacho too high.

- Increase Kp (speed controller).

- Use motor default value for Tn
  (speed controller).

- Reduce PID-T2.

- Reduce T-Tacho.

Motor runs 
roughly

- Kp (speed controller) too high.

- Tn (speed controller) too low.

- PID-T2 too low.

- T-Tacho too low.

- Reduce Kp (speed controller).

- Use motor default value for Tn
  (speed controller).

- Increase PID-T2.

- Increase T-Tacho.