Mitsubishi Servo Amplifier Alarm List - LNS QUICK LOAD SERVO S3 Troubleshooting And Spare Parts Manual

1 - 3 6

Mitsubishi Servo Amplifier Alarm List

CAUTION
The following faults may occur at start-up. If any of such faults occurs, take the corresponding action.
Position control mode
(1) Troubleshooting
No . Start-up sequence
•
1 Power on
•
Alarm occurs.
2 Switch on servo- Alarm occurs.
on signal.
Servo motor shaft is
not servo-locked
(is free).
3 Gain adjustment Rotation ripples
(speed fluctuations)
are large at low
speed.
Large load inertia
moment causes the
servo motor shaft to
oscillate side to side.
4 Cyclic operation Position shift occurs
QUICK LOAD SERVO S3
• Excessive adjustment or change of parameter setting must not be made as it will make operation
instable.
POINT
Using the optional servo configuration software, you can refer to unrotated servo motor reasons, etc.
Fault Investigation
Not improved if connectors
LED is not lit.
CN1A, CN1B, CN and CN3
LED flickers.
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 Alarm and warning list and remove cause.
Refer to Section Alarm and warning list and remove cause.
1. Check the display to see if
the servo amplifier is ready
to operate.
2. Check the external I/O
signal indication to see if the
servo-on (SON) signal is
ON.
Make gain adjustment in the
following procedure:
1. Increase the auto tuning
response level.
2. Repeat acceleration and
deceleration several times to
complete auto tuning.
If the servo motor may be
run with safety, repeat
acceleration and
deceleration several times to
complete auto tuning.
Confirm the cumulative
command pulses,
cumulative
feedback pulses and actual
servo motor position.
Possible cause
1. Power supply voltage fault
2 2. Servo amplifier is faulty.
Power supply of CNP1
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.
Gain adjustment fault
Gain adjustment fault
Pulse counting error, etc.
due to noise.
Chapter 1: Alarms
Reference
Section 11.2
Section 11.2
Section 6.6
of the
Mitsubishi
Servo
Amplifier
manual
Chapter 7 of
the
Mitsubishi
Servo
Amplifier
manual
Chapter 7 of
the
Mitsubishi
Servo
Amplifier
manual