Siemens alarm 10620: [Channel %1: ] Block %3 axis %2 at software limit switch %4
SINUMERIK 828D alarm · Siemens 828D
What it means
Motion would cross a software limit switch during execution - typically only detectable at runtime because an active work offset, transformation or handwheel overlay displaced the coordinate system after block preparation. Channel-specific NC start disable results until RESET.
Likely causes
- Zero-point offset programmed or moved incorrectly
- Coordinate transformation (ROT/SCALE/transmotion) active
- Software limit machine data not matched to setup or probe offsets
Need the part urgently?
Send us alarm 10620 with your machine details — typical RFQ turnaround is 24–48h.