Sinumerik Alarm 25001 Axis %1 hardware fault of passive encoder
%1 = Axis name, spindle number
The signals from the position actual value encoder that is presently not active are missing, or they are not of the same phase, or they exhibit grounding/short-circuit.
– Alarm display.
Please inform the authorized personnel/service department. Check measuring circuit connectors for correct contacting. Check encoder signals and replace the encoder if faults are found. Switch off the monitoring with the corresponding interface signal (DB 31 – 48, DBX 1.5 = 0 or DBX 1.6 = 0).
Clear alarm with the RESET key. Restart part program
- Siemens Diagnostics Guide by Siemens