Switch Over With and Without Encoder operation in S120

Absolute encoder:

When cyclically reading the absolute position, an excessively high difference to the incremental position was

detected. The absolute position that was read is rejected.

Limit value for the deviation:

- EnDat encoder: Is supplied from the encoder and is a minimum of 2 quadrants (e.g. EQI 1325 > 2 quadrants, EQN

1325 > 50 quadrants).

- other encoders: 15 pulses = 60 quadrants.

Incremental encoder:

When the zero pulse is passed, a deviation in the incremental position was detected.

For equidistant zero marks, the following applies:

- The first zero mark passed supplies the reference point for all subsequent checks. The other zero marks must have

n times the distance referred to the first zero mark.

For distance-coded zero marks, the following applies:

- the first zero mark pair supplies the reference point for all subsequent checks. The other zero mark pairs must have

the expected distance to the first zero mark pair.

Fault value (r0949, interpret decimal):

Deviation in quadrants (1 pulse = 4 quadrants).

See also: p0491 (Motor encoder fault response ENCODER)

- check the plug connections

- replace the encoder or encoder cable

- check whether the coding disk is dirty or there are strong ambient magnetic fields.

- adapt the parameter for the clearance between zero marks (p0425).

- if message output above speed threshold, reduce filter time if necessary (p0438).