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MELSEC-A
14 TROUBLESHOOTING
Error
code
Servo
amplifier
LED display
Name and definition Occurrence factor
1. Acceleration/deceleration time constant is too small.
2. Start disabled due to torque shortage.
3. Servo gain (PG1) setting too low.
4. Bus voltage in the unit low.
5. Servomotor rotated one turn by external force.
6. Machine struck something.
2052 52
Error excessive
Droop pulse value of the deviation counter
exceeded 80kpulses.
7. Encoder faulty.
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