Fagor alarm 2028: SERCOS chip version error.
CNC 8055 hardware/feedback error (analog axes) · Fagor 8055/8055i
What it means
At startup the CNC determined that the installed SERCOS interface chip is an older revision than the CNC software requires. Ring synchronization cannot be guaranteed with DDS digital drives, so operation is inhibited. Purely an obsolescence/version-mismatch condition, not a wiring fault.
Likely causes
- old SERCOS silicon combined with newer CNC firmware
- board swapped from another machine with different revision
Triage note: Update or exchange the SERCOS chip/board to match the CNC software version (Fagor service).
Need the part urgently?
Send us alarm 2028 with your machine details — typical RFQ turnaround is 24–48h.