Siemens alarm 116*: Contour monitoring
SINUMERIK 840C legacy alarm · Siemens 840C
What it means
During acceleration or deceleration the axis failed to follow the commanded velocity profile within tolerance, so actual contour deviates from the programmed contour. Typical mechanical/drive deficit indicator; NC START is interlocked until RESET.
Likely causes
- Mechanical stiction or worn transmission elements
- Undersized/mistuned drive or current limits
- Contour monitoring tolerances too tight for the dynamics
Triage note: * suffix = axis index
Need the part urgently?
Send us alarm 116* with your machine details — typical RFQ turnaround is 24–48h.