Siemens alarm F31150: Encoder 1: Initialization error
SINAMICS S120 encoder fault (Sensor Module / DRIVE-CLiQ encoder) · SINAMICS S120
What it means
The encoder functionality selected in p0404 did not initialize correctly - the self-test of the configured channels/tracks failed. The fault value mirrors the p0404 bit assignment, e.g. bit 5 set indicates track C/D error, letting you pinpoint which selected feature is not responding. Verify configuration against the actual encoder type before exchanging hardware.
Likely causes
- p0404 configuration does not match the connected encoder
- encoder type mismatch (incremental vs absolute wiring)
- encoder cable defect affecting specific tracks
- Sensor Module channel failure
Need the part urgently?
Send us alarm F31150 with your machine details — typical RFQ turnaround is 24–48h.