Mitsubishi Electric MR-E A Series Instruction Manual page 305

15. MR-E-
(2) Torque control mode
No. Start-up sequence
1 Power on (Note)
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2 Switch on servo-on
(SON).
3 Switch on forward
rotation start (RS1)
or reverse rotation
start (RS2).
Note: Switch power on again after making sure that the change lamp has turned off completely.
AG SERVO AMPLIFIER COMPATIBLE WITH ANALOG INPUT
Fault
LED is not lit.
LED flickers.
Alarm occurs.
Alarm occurs.
Servo motor shaft is
free.
Servo motor does
not rotate.
Investigation
Not improved if connectors
CN1, CN2 and CN3 are
disconnected.
Improved when connectors
CN1 is 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).
15 - 60
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
(1),
Section 5.1.2