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Overspeed
Alarm No.
The motor was detected to rotate at a speed exceeding the allowable speed (In the case of linear motor, it
31
was detected to move at a speed exceeding the allowable speed).
Investigation details
Check if the unit in which the alarm
1
was detected is servo or spindle.
Check the servo parameters SV001
2
(PC1), SV002 (PC2), SV018 (PIT) and
SV025 (MTYP) settings.
Check the spindle parameter SP026
3
(TSP) setting.
4 Check the PLG output waveform.
Check whether the speed waveform is
5
overshooting.
6 Check the repeatability.
Investigation results
The alarm was detected in servo.
The alarm was detected in spindle.
The settings are incorrect.
Correctly set.
The setting is incorrect.
The alarm is detected at 115% of
SP026.
Correctly set.
There is a problem.
Normal.
The waveform is overshooting.
The waveform is not overshooting.
[1] The alarm occurs when the motor is
stopped.
[2] The rotation speed displayed on
the drive monitor varies when the
motor is stopped.
The alarm occurs at all time.
M700VS Series Setup Manual
Appendix 2.13 Troubleshooting
Remedies
Check the investigation item No. 2.
Check the investigation item No. 3.
Correctly set.
Check the investigation item No. 5.
Correctly set.
Check the investigation item No. 4.
Adjust the PLG output waveform.
Check the investigation item No. 5.
Increase the acceleration/
deceleration time constant.
Lower the load inertia.
Check if there is any abnormality in the
unit's ambient environment.
(Ex.: Ambient temperature, noise,
grounding)
Check the investigation item No. 6.
Replace the detector or detector
cable.
Replace the drive unit.
SV SP
617
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Table of Contents
Troubleshooting
