WWW.NNC.IR
10 - 1
10. TROUBLESHOOTING
10. TROUBLESHOOTING
10.1 Trouble 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 (servo configuration software), 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.
10.1.1 Position control mode
(1) Troubleshooting
No.
Start-up sequence
Fault
Investigation
Possible cause
Reference
Not improved if connectors
CN1A, CN1B, CN2 and CN3
are disconnected.
1. Power supply voltage fault
2. Servo amplifier is faulty.
Improved when connectors
CN1A and CN1B are
disconnected.
Power supply of CNP1 cabling
is shorted.
Improved when connector
CN2 is disconnected.
1. Power supply of encoder
cabling is shorted.
2. Encoder is faulty.
LED is not lit.
LED flickers.
Improved when connector
CN3 is disconnected.
Power supply of CN3 cabling is
shorted.
1
Power on
Alarm occurs.
Refer to section 10.2 and remove cause.
Section 10.2
Alarm occurs.
Refer to section 10.2 and remove cause.
Section 10.2
2
Switch on servo-on
(SON).
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 (SON) is ON.
1. Servo-on (SON) is not input.
(Wiring mistake)
2. 24VDC power is not
supplied to COM.
Section 6.6
Servo motor does
not rotate.
1. Wiring mistake
(a) For open collector pulse
train input, 24VDC
power is not supplied to
OPC.
(b) LSP and LSN are not on.
2. No pulses is input.
Section 6.2
3
Enter input
command.
(Test operation)
Servo motor run in
reverse direction.
Check cumulative command
pulses.
1. Mistake in wiring to
controller.
2. Mistake in setting of
parameter No. 54.
Chapter 5
Summary of Contents for MR-J2S-*A
Page 13: ...WWW NNC IR A 12 MEMO ...
Page 117: ...WWW NNC IR 3 70 3 SIGNALS AND WIRING MEMO ...
Page 185: ...WWW NNC IR 7 12 7 GENERAL GAIN ADJUSTMENT MEMO ...
Page 195: ...WWW NNC IR 8 10 8 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 197: ...WWW NNC IR 9 2 9 INSPECTION MEMO ...
Page 221: ...WWW NNC IR 11 10 11 OUTLINE DIMENSION DRAWINGS MEMO ...
Page 293: ...WWW NNC IR 13 64 13 OPTIONS AND AUXILIARY EQUIPMENT MEMO ...
Page 321: ...WWW NNC IR 14 28 14 COMMUNICATION FUNCTIONS MEMO ...
Page 389: ...WWW NNC IR 15 68 15 ABSOLUTE POSITION DETECTION SYSTEM MEMO ...