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MELSEC-A
14 TROUBLESHOOTING
Relevant buffer memory
address
Axis 1 Axis 2 Axis 3
Checking method Remedy
Connect correctly.
Change the cable.
Take noise suppression measures.
Connect correctly.
Set correctly.
Review the operation program.
Take noise suppression measures.
Change the AD75.
Connect correctly.
Change the cable.
Change the servo amplifier.
Connect correctly.
Change the servo amplifier.
Refer to section "5.2.11
Servo parameters for MR-
J2-03B5".
Set the parameter value to within the setting range.
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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