Siemens alarm 112*: Clamping monitoring
SINUMERIK 810/820 legacy alarm · Siemens 810/820
What it means
During positioning, the following error could not be eliminated within the time fixed in machine data 156, meaning a commanded-stationary axis sits outside its permitted window. The trailing digit (*) selects the axis: 0 = axis 1 through 4 = axis 5. Reaction: NC START inhibit, controlled stop and follow-up operation.
Likely causes
- Mechanical binding or collision load on the axis
- Servo/drive unable to hold position (tachometer, power stage)
- MD156 clamping-monitoring time too short for the axis dynamics
Triage note: * suffix = axis index
Need the part urgently?
Send us alarm 112* with your machine details — typical RFQ turnaround is 24–48h.