Siemens alarm 12470: Channel %1 block %2 G function %3 is unknown
SINUMERIK channel alarm · Siemens 840D/810D powerline
What it means
The block contains a G number that is defined neither in the standard function set nor as an OEM/user-defined function on this control. G code sets differ between dialects and ISO modes, so imported programs often carry unknown numbers. Correct the number or configure the function where applicable.
Likely causes
- Foreign-dialect G codes used on Siemens
- Typo in the G number
- User-defined G function not configured via machine data
Need the part urgently?
Send us alarm 12470 with your machine details — typical RFQ turnaround is 24–48h.