Fanuc alarm SP9069: SAFETY SPEED EXCEEDED
spindle alarm (serial spindle safety monitoring) · Fanuc 0i-D
What it means
Under Dual Check Safety, the monitored spindle speed exceeded the active safety speed limit and the independent monitor confirmed the violation. The drive enforces a safe stop since the safety function's core promise was breached.
Likely causes
- Actual overspeed event (command fault or runaway)
- Safety speed parameters set below legitimate operating speeds
- Speed measurement discrepancy between the two monitoring channels
Triage note: Safety-system involvement requires qualified personnel to release.
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