F31100 fault in Siemens V70 Drive

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F31100 fault in Siemens V70 Drive indicates a Zero mark distance error. This means the physical distance measured between the encoder's zero marks does not match the expected parameterized distance, pointing to electrical noise or a faulty encoder. Cause:

The measured zero mark distance does not correspond to the parameterized zero mark distance. For distance-coded encoders, the zero mark distance is determined from zero marks detected pairs. If a zero mark is missing, depending on the pair generation, this cannot result in a fault and also has no effect in the system.

Remedy:

  • Check that the encoder cables are routed in compliance with EMC.
  • Check the plug connections.
  • Check the encoder type (encoder with equidistant zero marks).
  • Replace the encoder or encoder cable.

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