Code 231-8C20: Position encoder %1 defective

[Cause of error] - There is no position encoder signal - Interruption of the position encoder cable - The signal amplitude of the position encoder is missing or too small - The position encoder is contaminated - Incorrect values of the machine parameter posEncoderResistor during use of an external Y cable - Incorrect values of the machine parameter posEncoderFreq at feed rates greater than 50 kHz (counting frequency results from the encoder resolution) [Error correction] - Check the position encoder connection - Check the function of the position encoder - Check the amplitude of the position encoder. - Check settings in machine parameter PosEncoderResistor. If an external Y cable is used, a 1 has to be entered in this machine parameter. - Check the setting of the machine parameter posEncoderFreq and max. feed velocity. At feed rates greater than 50 kHz (corresponding counting frequency at the position input results from the resolution of the encoder), a 1 must be entered in posEncoderFreq. - Inform your service agency