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15. MR-E- AG-QW003 SERVO AMPLIFIER COMPATIBLE WITH ANALOG INPUT
15.6. Troubleshooting
15.6.1 Trouble at start-up
The following faults may occur at start-up. If any of such faults occurs, take the corresponding action.
(1) Speed 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 (ST1) or
reverse rotation start
(ST2).
4
Gain adjustment
Note. Switch power on again after making sure that the change 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) is ON.
Servo motor does not
Call the status display and
rotate.
check the input voltage of the
analog speed command (VC).
Call the external I/O signal
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).
When the analog torque limit
(TLA) is usable, check the
input voltage on the status
display.
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 acceleration
servo motor shaft to
and deceleration several times
oscillate side to side.
to complete auto tuning.
15 - 62
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 speed command is 0V.
LSP, LSN, ST1 or ST2 is off.
Set value is 0.
Torque limit level is too low as
compared to the load torque.
Torque limit level is too low as
compared to the load torque.
Gain adjustment fault
Gain adjustment fault
Possible cause
Reference
Section 10.2
Section 10.2
Section 6.6
Section 6.2
Section 6.6
Section
5.1.2 (1)
Chapter 7
Chapter 7
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Table of Contents
Troubleshooting
