Program Operation Method - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

5. HOW TO USE THE PROGRAM
No. Start-up sequence
4 Switch on ST1 Servo motor does not
(Forward rotation rotate.
start).
5 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.
Note. Only a list of alarms and warnings is listed in chapter 8. Refer to "MELSERVO-J4 Servo Amplifier Instruction Manual
(Troubleshooting)" for details of alarms and warnings.

5.2 Program operation method

5.2.1 Program operation method
In advance, select a program created on MR Configurator2 by using an input signal or communication to
start operation with ST1 (Forward rotation start).
This servo amplifier is factory set to the absolute value command method.
For the position data, you can set the absolute value travel command ("MOV" command), which specifies
the target address, and the incremental value travel command ("MOVI" command), which specifies the travel
distance. Refer to section 4.2.1 (1) and 5.2.3 (1) (a) for the movable range and the setting unit.
Fault Investigation
Call the external I/O signal
display (Section 3.1.7 or 3.2.7)
and check the on/off status of the
input signal.
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.
Make gain adjustment in the
following procedure.
1. Increase the auto tuning
response level.
2. Repeat acceleration/
deceleration more than three
times to complete auto tuning.
If the servo motor may be driven
with safety, repeat acceleration
and deceleration three times or
more to complete the auto tuning.
5 - 6
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Possible cause
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.
Gain adjustment fault
Gain adjustment fault
Reference
Section
3.1.7
Section
3.2.7
Section
7.2.1
Section
3.1.2
Section
3.2.2
MR-J4-
_A_
Chapter
6
MR-J4-
_A_
Chapter
6