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B-61395E/07
6. TROUBLESHOOTING
6.17 ALARM 401 ,403 ,406, 491 (*DRDY SIGNAL TURNED OFF)
Alarm 401, 403, 406 or 491 of servo amplifier is not turned on or turned off duration operation.
D C series servo amplifier
Power on sequence (NC# Servo amplifier)
Content Credit: FANUC Product Manual