4. HOW TO USE THE POINT TABLE
4 - 7
No. Start-up sequence Fault Investigation Possible cause Reference
3 Perform a home
position return.
Servo motor does not
rotate.
Check the on/off status of the
input signal with the external I/O
signal display. (Refer to section
3.1.7.)
LSP, LSN, and ST1 are off.
Section
3.1.7
Check [Pr. PA11 Forward
rotation torque limit] and [Pr.
PA12 Reverse rotation torque
limit].
Torque limit level is too low for
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 for
the load torque.
Section
3.1.2
The home position
return is not completed.
Check the on/off status of input
signal DOG with the external I/O
signal display. (Refer to section
3.1.7.)
The proximity dog is set
incorrectly.
Section
3.1.7
4 Switch on ST1
(Forward rotation
start) or ST2
(Reverse rotation
start).
Servo motor does not
rotate.
Check the on/off status of the
input signal with the external I/O
signal display (section 3.1.7).
LSP, LSN, and ST2 are off.
Section
3.1.7
Check [Pr. PA11 Forward rotation
torque limit] and [Pr. PA12
Reverse rotation torque limit].
Torque limit level is too low for
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 for
the load torque.
Section
3.1.2
5 Gain adjustment Rotation ripples (speed
fluctuations) are large
at low speed.
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.
Gain adjustment fault MR-JE-_A
Chapter 6
Large load inertia
moment causes the
servo motor shaft to
oscillate side to side.
If the servo motor may be driven
with safety, repeat acceleration
and deceleration three times or
more to complete the auto tuning.
Gain adjustment fault MR-JE-_A
Chapter 6
Note. Only a list of alarms and warnings is listed in chapter 8. Refer to "MELSERVO-JE Servo Amplifier Instruction Manual
(Troubleshooting)" for details of alarms and warnings.
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