Program Operation Method - Mitsubishi Electric MELSERVO-J4 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. Note that the available travel range is -999999 to 999999 [×10
within the range.
Setting range: -999999 to 999999 [×10
Fault Investigation
Call the external I/O signal
display (section 3.7) and check
the on/off status of the input
signal.
Check the forward rotation torque
limit ([Pr. PA11]) and the reverse
rotation torque limit ([Pr. PA12]).
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 and
deceleration several times to
complete auto tuning.
If the servo motor may be driven
with safety, repeat acceleration
and deceleration several times to
complete auto tuning.
STM
μm] (STM = Feed length multiplication [Pr. PT03])
-999999
Setting range of the position data
5 - 6
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
STM
μm]. Positioning is available
999999
μm]
[×10 STM
Possible cause Reference
Section
Section
Section
MR-J4-
Chapter
MR-J4-
Chapter
3.7
7.2.1
3.2
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6
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6