Actual Operation; Troubleshooting At Start-Up - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

5. HOW TO USE THE PROGRAM

5.1.5 Actual operation

Start actual operation after confirmation of normal operation by test operation and completion of the
corresponding parameter settings.

5.1.6 Troubleshooting at start-up

CAUTION
The following faults may occur at start-up. If any of such faults occurs, take the corresponding action.
"MR-J4-_A_" means "MR-J4-_A_(-RJ) Servo Amplifier Instruction Manual".
No. Start-up sequence
1 Power on The 7-segment LED
display does not turn
on.
The 7-segment LED
display flickers.
Alarm occurs.
2 Switch on SON Alarm occurs.
(Servo-on).
Servo motor shaft is
not servo-locked.
(Servo motor shaft is
free.)
3 Perform a home Servo motor does not
position return. rotate.
The home position
return is not completed.
Never make a drastic adjustment or change to the parameter values as doing so
will make the operation unstable.
POINT
Using MR Configurator2, you can refer to the reason for rotation failure, etc.
Fault
Not improved even if CN1, CN2,
and CN3 connectors are
disconnected.
Improved when CN1 connector is
disconnected.
Improved when CN2 connector is
disconnected.
Improved when CN3 connector is
disconnected.
Refer to chapter 8 and remove the cause.
Refer to chapter 8 and remove the cause.
1. Check the display to see if the
servo amplifier is ready to
operate.
2. Check the external I/O signal
indication (section 3.1.7 or
3.2.7) to see if SON (Servo-
on) is on.
Call the external I/O signal display
and check the on/off status of the
input signal. (Refer to section
3.1.7 or 3.2.7.)
Check [Pr. PA11 Forward rotation
torque limit] and [Pr. PA12
Reverse rotation torque limit].
When TLA (Analog torque limit) is
usable, check the input voltage on
the status display.
Call the external I/O signal display
and check the on/off status of
input signal DOG. (Refer to
section 3.1.7 or 3.2.7.)
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Investigation
1. Power supply voltage fault
2. The servo amplifier is
malfunctioning.
Power supply of CN1 cabling is
shorted.
1. Power supply of encoder
cabling is shorted.
2. Encoder is malfunctioning.
Power supply of CN3 cabling is
shorted.
1. SON (Servo-on) is not input.
(wiring mistake)
2. 24 V DC power is not supplied
to DICOM.
LSP, LSN, and ST1 are off.
Torque limit level is too low as
compared to the load torque.
Torque limit level is too low as
compared to the load torque.
The proximity dog is set
incorrectly.
5 - 5
Possible cause Reference
Chapter 8
(Note)
Chapter 8
(Note)
Section
3.1.7
Section
3.2.7
Section
3.1.7
Section
3.2.7
Section
7.2.1
Section
3.1.2
Section
3.2.2
Section
3.1.7
Section
3.2.7