F7414 fault in Siemens V70 Drive indicates the Encoder serial number changed. This means the drive detected a different encoder serial number than what was previously saved, requiring a new pole position adjustment.
Cause:
- The encoder was replaced.
- A third-party, build-in or linear motor was re-commissioned.
- The motor with integrated and adjusted encoder was replaced.
- The firmware was updated to a version that checks the encoder serial number.
Remedy:
Re causes 1, 2:
- Carry out an automatic adjustment using the pole position identification routine.
- Acknowledge the fault. Initiate the pole position identification routine.
- Check that the pole position identification routine is correctly executed.
- SERVO: If a pole position identification technique is selected, and if p0301 does not contain a motor type with an encoder adjusted in the factory, then p1990 is automatically activated.
- Mechanically adjust the encoder. Accept the new serial number.
Re causes 3, 4:
- Accept the new serial number with p0440 = 1.
