Internal Speed Control Mode - Mitsubishi Electric EZMOTION MR-E Super MR-E-10A-QW003 Instruction Manual

10. TROUBLESHOOTING

10.1.2 Internal speed control mode

No. Start-up sequence
1 Power on (Note)
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2 Switch on servo-on
signal.
3 Switch on forward
rotation start (ST1) or
reverse rotation start
(ST2).
4 Gain adjustment
Note. Switch power on again after making sure that the charge lamp has turned off completely.
Fault
LED is not lit. Not improved if connectors
LED flickers. CN1, CN2 and CN3 are
disconnected.
Improved when connectors
CN1 is 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 1. Check the display to see if
not servo-locked the servo amplifier is ready
(is free). to operate.
2. Check the external I/O
signal indication to see if the
servo-on (SON) signal is
ON.
Servo motor does not Call the external I/O signal
rotate. display and check the ON/OFF
status of the input signal.
Check the internal speed
commands 1 to 7
(parameters No.8 to 10 72 to
75).
Check the internal torque limit
1 (parameter No.28).
Rotation ripples Make gain adjustment in the
(speed fluctuations) following procedure.
are large at low 1. Increase the auto tuning
speed. response level.
2. Repeat acceleration and
deceleration several times
to complete auto tuning.
Large load inertia If the servo motor may be run
moment causes the with safety, repeat
servo motor shaft to acceleration and deceleration
oscillate side to side. several times to complete auto
tuning.
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 signal is not input.
(Wiring mistake)
2. 24VDC power is not supplied
to COM.
LSP, LSN, ST1 or ST2 is off.
Set value is 0.
Torque limit level is too low as
compared to the load torque.
Gain adjustment fault
Gain adjustment fault
10 - 4
Possible cause Reference
Section 10.2
Section 10.2
Section 6.6
Section 6.6
Section 5.1.2
(1)
Chapter 7
Chapter 7