Siemens alarm 172*/176*: +*/-* Working area limit
SINUMERIK 810/820 legacy alarm · Siemens 810/820
What it means
Motion reached the protected working-area boundary held in setting data - plus side 172*, minus side 176* - which guards fixtures or the chuck against collision. NC START is inhibited until the program or the working-area limits are corrected; in JOG mode the limits come from a machine data.
Likely causes
- Programmed point inside protection zone around fixture/chuck
- Working-area limits entered wrongly or left over from previous job
- Offsets shifting effective coordinates toward the zone
Triage note: * suffix = axis index
Need the part urgently?
Send us alarm 172*/176* with your machine details — typical RFQ turnaround is 24–48h.