Siemens alarm 25031: Axis %1 actual velocity warning limit
SINUMERIK axis/spindle alarm · Siemens 840D/810D powerline
What it means
Warning-level response of the same velocity monitoring that triggers alarm 25030: the actual velocity approached or touched the monitoring threshold without crossing into the alarm region. It indicates marginal dynamics or measurement rather than an acute runaway.
Likely causes
- threshold MD 36200 set too tight relative to real rapid speeds
- brief overspeed peaks during emergency braking ramps
- encoder scaling slightly wrong (resolution/gear ratio data)
- early stage of drive or encoder deterioration
Triage note: Observe together with 25030 occurrences; persistent warnings justify encoder/cable checks.
Need the part urgently?
Send us alarm 25031 with your machine details — typical RFQ turnaround is 24–48h.