Fanuc · Alpha i Series Servo Amplifier
The spindle detected that the speed of the spindle motor exceeded the safety speed (parameter No. 4372/No.4438/No.4440/No.4442) during safety monitoring (when the safety check request signal (*VLDPs) is 0). This indicates an unsafe spindle operating speed, which is a critical safety violation.
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Check the configured safety speed parameters (No. 4372/No.4438/No.4440/No.4442) for appropriate values.
Ensure current operation is performed at a speed not exceeding the defined safety speed.