11 - 1
11. TROUBLESHOOTING
11. TROUBLESHOOTING
11.1 Troubleshooting at start-up
CAUTION
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.
The following faults may occur at start-up. If any of such faults occurs, take the corresponding action.
No.
Occurrence
stage Fault
Investigation
Possible
cause Reference
1 Power
on
7-segment LED is
not lit.
7-segment LED
flickers.
Not improved if connectors
CN2, CN3 and CN6 are
disconnected.
1. Power supply voltage fault
2. Servo amplifier is faulty.
Improved when connector
CN6 is disconnected.
Power supply of CN6 cabling is
shorted.
Improved when connector
CN2 is disconnected.
1. Power supply of encoder
cabling is shorted.
2. Encoder is faulty.
Improved when connector
CN3 is disconnected.
Power supply of CN3 cabling is
shorted.
Alarm occurs.
Remove cause.
Section 14.4
2 Switch
on
servo-on
signal.
Alarm occurs.
Remove cause.
Section 14.4
Servo motor shaft is
not servo-locked
(is free).
1. Check the display to see if
the servo amplifier is ready
to operate.
2. Check the external I/O
signal indication to see if
the servo-on signal is ON.
1. Servo-on is not on. (Wiring
mistake)
2. Interface power supply
(24VDC) is not supplied.
Section 8.5.4
3 Gain
adjustment
Rotation
ripples
(speed fluctuations)
are large at low
speed.
Make gain adjustment in the
following procedure.
1. Increase the auto tuning
response level.
2. Repeat acceleration and
deceleration several times
to complete auto tuning.
Gain adjustment fault
Chapter 9
Large load inertia
moment causes the
servo motor shaft to
oscillate side to side.
If it is safe to run the servo
motor, repeat acceleration
and deceleration several
times to complete auto tuning.
Gain adjustment fault
Chapter 9
4
Cyclic operation
Position shift occurs
Confirm the command
position, current position,
cumulative feedback pulses
and actual servo motor
position.
Communication command fault,
slipping of machines, etc.
Summary of Contents for Melservo-J3 Series MR-J3-B
Page 19: ...10 MEMO ...
Page 55: ...1 36 1 FUNCTIONS AND CONFIGURATION MEMO ...
Page 61: ...2 6 2 INSTALLATION MEMO ...
Page 179: ...4 58 4 SIGNALS AND WIRING MEMO ...
Page 241: ...5 62 5 OPERATION MEMO ...
Page 357: ...10 16 10 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 385: ...11 28 11 TROUBLESHOOTING MEMO ...
Page 397: ...12 12 12 OUTLINE DRAWINGS MEMO ...
Page 755: ...17 70 17 SPEED CONTROL OPERATION MEMO ...
Page 793: ...App 38 APPENDIX MEMO ...
Page 799: ...MEMO ...