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MELSEC-A
14 TROUBLESHOOTING
Relevant buffer memory
address
Axis 1 Axis 2 Axis 3
Checking method Remedy
Change the servo amplifier.
102 252 402
Set " Pr.102 Regenerative brake resistor" correctly.
Review environment so that ambient temperature is 0 to
40°C.
1. Reduce load.
2. Review operation pattern.
3. Use servomotor that provides larger output.
Change servomotor.
1. Reduce load.
2. Review operation pattern.
3. Use servomotor that provides larger output.
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.
1. Review operation pattern.
2. Install limit switches.
Connect correctly.
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.
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.
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.
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