Torque Control Mode - Mitsubishi Electric MR-J2S-A Instruction Manual

10. TROUBLESHOOTING

10.1.3 Torque control mode

No. Start-up sequence
1 Power on
Alarm occurs.
2 Switch on servo-on Alarm occurs.
(SON).
Servo motor shaft is
free.
3 Switch on forward Servo motor does
rotation start (RS1) not rotate.
or reverse rotation
start (RS2).
Fault Investigation
LED is not lit. Not improved if connectors
LED flickers. CN1A, CN1B, CN2 and CN3
are disconnected.
Improved when connectors
CN1A and CN1B are
disconnected.
Improved when connector
CN2 is disconnected.
Improved when connector
CN3 is disconnected.
Refer to section 10.2 and remove cause.
Refer to section 10.2 and remove cause.
Call the external I/O signal
display and check the
ON/OFF status of the input
signal.
Call the status display and
check the analog torque
command (TC).
Call the external I/O signal
display and check the
ON/OFF status of the input
signal.
Check the internal speed
limits 1 to 7
(parameters No. 8 to 10 72
to 75).
Check the analog torque
command maximum output
(parameter No. 26) value.
Check the internal torque
limit 1 (parameter No. 28).
10 - 5
WWW.NNC.IR
Possible cause
1. Power supply voltage fault
2. Servo amplifier is faulty.
Power supply of CN1 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 (SON) is not input.
(Wiring mistake)
2. 24VDC power is not
supplied to COM.
Analog torque command is 0V.
RS1 or RS2 is off.
Set value is 0.
Torque command level is too
low as compared to the load
torque.
Set value is 0.
Reference
Section 10.2
Section 10.2
Section 6.6
Section 6.2
Section 6.6
Section
5.1.2 (1)