Cause : Encoder 1 feedback fault.

If fault appears during first start-up before encoder feedback is used:
- Check cable between encoder and encoder interface module (FEN-xx) and order of connector signal wires at both ends of cable. If absolute encoder, EnDat/Hiperface/SSI, with incremental sin/cos pulses is used, incorrect wiring can be located as follows: Disable serial link (zero position) by setting parameter 91.02 ABS ENC INTERF to (0)
None and test encoder operation:
- If encoder fault is not activated, check serial link data wiring. Note that zero position is not taken into account when serial link is disabled.
- If encoder fault is activated, check serial link and sin/cos signal wiring.
Note: Because only zero position is requested through serial link and during run, position is updated according to sin/cos pulses.
- Check encoder parameter settings. If fault appears after encoder feedback has already been used or during drive run:
- Check that encoder connection wiring or encoder is not damaged.
- Check that encoder interface module (FEN- xx) connection or module is not damaged.
- Check earthings (when disturbances are detected in communication between encoder interface module and encoder).
Note: The new settings (or fixed wiring) willonly take effect after parameter 90.10 ENC PAR REFRESH is used or after the JCU control unit is powered up the next time.