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

10. TROUBLESHOOTING

10.1.3 Torque control mode

No. Start-up sequence
1 Power on
2 Switch on servo-on
(SON).
3 Switch on forward
rotation start (RS1)
or reverse rotation
start (RS2).
Fault
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.
Alarm occurs. Refer to Section 10.2 and remove cause.
Alarm occurs. Refer to Section 10.2 and remove cause.
Servo motor shaft is Call the external I/O signal
free. display and check the
ON/OFF status of the input
signal.
Servo motor does Call the status display and
not rotate. 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).
Investigation
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.
10 - 5
Possible cause Reference
Section 10.2
Section 10.2
Section 6.6
Section 6.2
Section 6.6
Section 5.1.2
(1),