Mitsubishi Electric MELSERVO MR-J4-03A6-RJ, Instruction Manual

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5. HOW TO USE THE PROGRAM
5 - 5
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
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.
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 Fault Investigation Possible cause Reference
1 Power on The 7-segment LED
display does not turn
on.
The 7-segment LED
display flickers. Not improved even if CN1, CN2,
and CN3 connectors are
disconnected. 1. Power supply voltage fault
2. The servo amplifier is
malfunctioning.
Improved when CN1 connector is
disconnected. Power supply of CN1 cabling is
shorted.
Improved when CN2 connector is
disconnected. 1. Power supply of encoder
cabling is shorted.
2. Encoder is malfunctioning.
Improved when CN3 connector is
disconnected. Power supply of CN3 cabling is
shorted.
Alarm occurs. Refer to chapter 8 and remove the cause. Chapter 8
(Note)
2 Switch on SON
(Servo-on). Alarm occurs. Refer to chapter 8 and remove the cause. Chapter 8
(Note)
Servo motor shaft is
not servo-locked.
(Servo motor shaft is
free.) 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.
1. SON (Servo-on) is not input.
(wiring mistake)
2. 24 V DC power is not supplied
to DICOM.
Section
3.1.7
Section
3.2.7
3 Perform a home
position return. Servo motor does not
rotate. 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.) LSP, LSN, and ST1 are off. Section
3.1.7
Section
3.2.7
Check [Pr. PA11 Forward rotation
torque limit] and [Pr. PA12
Reverse rotation torque limit]. Torque limit level is too low as
compared to the load torque. Section
7.2.1
When TLA (Analog torque limit) is
usable, check the input voltage on
the status display. Torque limit level is too low as
compared to the load torque. Section
3.1.2
Section
3.2.2
The home position
return is not completed. 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.) The proximity dog is set
incorrectly. Section
3.1.7
Section
3.2.7
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