F31130 fault in siemens sinamics V90 drive indicates a Zero mark and position error from coarse synchronization. This means the encoder’s zero mark was detected outside its expected phase window after initial pole position identification.
Cause:
After initializing the pole position using track C/D, Hall signals or pole position identification routine, the zero mark was detected outside the permissible range. For distance-coded encoders, the test is carried out after passing 2 zero marks. Fine synchronization was not carried out.
Remedy:
- Check that the encoder cables are routed in compliance with EMC.
- Check the plug connections.
- If the Hall sensor is used as an equivalent for track C/D, check the connection.
- Check the connection of track C or D.
- Replace the encoder or encoder cable.
