Error message

C420 Uncontrollability %s caused by incorrect parameters

Cause of error

- Feedforward-control parameters are set incorrectly (acceleration, friction)
- Excessive acceleration
- Controller parameters are set incorrectly (Ki, Kp, Kd)
- Filters set incorrectly (band rejection, low pass)
- Inverter is defective (IGBT)
- Incorrect motor selected in motor table

Error correction

- Inform your service agency
- Check the adjustment of the axes
- Check the inverter