F7414 fault in Siemens V70 Drive

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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:
  1. The encoder was replaced.
  2. A third-party, build-in or linear motor was re-commissioned.
  3. The motor with integrated and adjusted encoder was replaced.
  4. 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.

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