Siemens alarm 14090: Channel %1 block %2 illegal D number
SINUMERIK channel alarm · Siemens 840D/810D powerline
What it means
The programmed D word (tool offset number) exceeds the number of offset data blocks configured for the selected tool, or is otherwise invalid in this context. Each tool carries only a limited set of D blocks per machine configuration. Use a D number within the configured range.
Likely causes
- D number larger than configured offsets per tool
- D word used without a matching tool selection
- Configuration change reducing available D blocks after programs were written
Need the part urgently?
Send us alarm 14090 with your machine details — typical RFQ turnaround is 24–48h.