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

6. HOW TO USE INDEXER

6.1.5 Actual operation

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

6.1.6 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
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 reason for rotation failure, etc.
Fault
LED is not lit. Not improved even if CN1, CN2,
and CN3 connectors are
LED flickers.
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 cause.
Refer to chapter 8 and remove cause.
1. Check the display to see if the
servo amplifier is ready to
operate.
2. Check the external I/O signal
display (section 3.7) 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 3.7.)
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 DOG. (Refer to section
3.7.)
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.
6 - 5
Possible cause Reference
Chapter 8
(Note)
Chapter 8
(Note)
Section
Section
Section
Section
Section
3.7
3.7
7.2.1
3.2
3.7