Troubleshooting; Trouble At Start-Up - Mitsubishi Electric MELSERVO-J3 Series Manual
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Also See for MELSERVO-J3 Series:
- Instruction manual (802 pages) ,
- Handbook (590 pages) ,
- Manual (500 pages)
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11. TROUBLESHOOTING
11. TROUBLESHOOTING
11.1 Trouble at start-up
CAUTION
The following faults may occur at start-up. If any of such faults occurs, take the corresponding action.
No.
Start-up sequence
1
Power on
2
Switch on servo-on
(RYn0) signal.
3
Gain adjustment
4
Cyclic operation
Excessive adjustment or change of parameter setting must not be made as it will
make operation instable.
POINT
Using the MR Configurator, you can refer to unrotated servo motor reasons,
etc.
Fault
LED is not lit.
Not improved if connectors
LED flickers.
CN2, CN3 and CN6 are
disconnected.
Improved when connectors
CN6 is disconnected.
Improved when connector
CN2 is disconnected.
Improved when connector
CN3 is disconnected.
Alarm occurs.
Refer to section 14.4 and remove cause.
Alarm occurs.
Refer to section 14.4 and remove cause.
Servo motor shaft is
1. Check the display to see if
not servo-locked
the servo amplifier is ready
(is free).
to operate.
2. Check the external I/O
signal indication to see if
the servo-on (RYn0) signal
is ON.
Rotation ripples
Make gain adjustment in the
(speed fluctuations)
following procedure.
are large at low
1. Increase the auto tuning
speed.
response level.
2. Repeat acceleration and
deceleration several times
to complete auto tuning.
Large load inertia
If the servo motor may be run
moment causes the
with safety, repeat
servo motor shaft to
acceleration and deceleration
oscillate side to side.
several times to complete
auto tuning.
Position shift occurs
Confirm the cumulative
command pulses, cumulative
feedback pulses and actual
servo motor position.
Investigation
1. Power supply voltage fault
2. Servo amplifier is faulty.
Power supply of CN6 cabling is
shorted.
1. Power supply of encoder
cabling is shorted.
2. Encoder is faulty.
Power supply of CN3 cabling is
shorted.
1. Servo-on (RYn0) is not input.
(Wiring mistake)
2. 24VDC power is not supplied
to DICOM.
Gain adjustment fault
Gain adjustment fault
Pulse counting error, etc.
due to noise.
11 - 1
Possible cause
Reference
Section 14.4
Section 14.4
Section 8.5.4
Chapter 9
Chapter 9
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Table of Contents
Troubleshooting
