Hello,

check your encoder. Is zero mark available?

If yes, check correct wiring and parameterization.

4.6 Encoder

5.7 Function parameters - "Encoders and drives" tab

6.3 Incremental encoder (TTL)

https://support.industry.siemens.com/cs/ww/en/view/35014863

Hello,

search for the reason of the fault on IM174 side.

7. Interrupt, error and system messages

https://support.industry.siemens.com/cs/ww/en/view/35014863

Hello,

maybe the cero mark signal of the encoder is defect.

Hello,

try another encoder or use a suitable encoder.

Incremental encoder (TTL)

● Differential transmission with RS422 (5 V or 24 V encoder supply voltage):

● Track A as true and negated signal (Ua1+, Ua1-)

● Track B as true and negated signal (Ua2+, Ua2-)

● Zero signal N as true and negated signal (Ua0+, Ua0-)

● Maximum output frequency: 1 MHz

● Phase shift of Track A to Track B: 90 degrees ± 30 degrees

● Current consumption: 300 mA max.

● Encoders with distance-coded zero marks / reference marks are not generally

enabled

Hello,

you use I have 2 kinco drivers with 2 kinco servo motors.

So I guess you get a simulated encoder signal from the kinco driver, because the motor encoder is connected to the drive.

I would ask kinco about your problem or use a bero for homing, when cero mark is not working.