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MELSEC-A
14 TROUBLESHOOTING
Relevant buffer memory
address
Axis 1 Axis 2 Axis 3
Checking method Remedy
1. Review operation pattern.
2. Install limit switches.
Connect correctly.
Servo response setting
109 259 409
1. Repeat acceleration/deceleration to execute auto
tuning.
2. Change " Pr.109 Servo response setting".
3. Set auto tuning to OFF and make gain adjustment
manually.
Change the servo amplifier.
When the servomotor shaft is rotated slowly
with the servo OFF, the cumulative feedback
pulses should vary in proportion to the rotary
angle. (If the indication skips or returns
midway, the encoder is faulty.)
Change the servomotor.
Increase the acceleration/deceleration time constant.
1. Review the power supply capacity.
2. Use servomotor that provides larger output.
113 263 413
Increase the setting and adjust to ensure proper
operation.
Change the servo amplifier.
Torque limit setting value
24 174 324
Zero point return torque
limit value
86 236 386
Torque output setting value
1180 1230 1280
1. When torque is limited, increase the limit value.
2. Reduce load.
3. Use servomotor that provides larger output.
1. Review operation pattern.
2. Install limit switches.
Change the servomotor.
Connect correctly.
Repair or change the cable.
Change the telecommunication equipment.
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