Siemens alarm 7202: Missing option bit for %1
SINUMERIK NCK general alarm · Siemens 840D/810D powerline
What it means
A Siemens compile cycle (.elf extension module) requires an NCK option that is not enabled on this control; the alarm names the affected .elf file and the missing option bit in hexadecimal. The compile cycle cannot run, and depending on reaction class the NC refuses readiness. Purchasing/enabling the option or removing the cycle resolves it.
Likely causes
- Compile-cycle software installed without purchasing the matching NCK option
- License/option data lost after NCK or CompactFlash replacement
- Version mismatch between compile cycles and NCK software
Triage note: Check enabled options in the license overview; restore license key after hardware swaps via Siemens licensing portal.
Need the part urgently?
Send us alarm 7202 with your machine details — typical RFQ turnaround is 24–48h.