F31112 fault in Siemens V70 Drive

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F31112 fault in Siemens V70 Drive indicates an Error bit set in the serial protocol. This means the absolute encoder is actively broadcasting an internal error code to the drive over the serial connection. Cause:

The encoder sends a set error bit via the serial protocol.

Remedy:

  • Check the encoder cable and shielding connection.
  • Replace the motor.

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