Mitsubishi Electric MELSEC-LD77MS2 User Manual page 659

Chapter 12 Expansion Control
CAUTION
If operation that generates torque more than 100% of the rating is performed with an
abnormally high frequency in a servomotor stop status (servo lock status) or in a 30r/min or less
low-speed operation status, the servo amplifier may malfunction regardless of the electronic
thermal relay protection.
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