Mitsubishi Electric MR-JE-C, Instruction Manual

Page: 134 / 312

7. HOW TO USE THE POINT TABLE
7 - 5
No. Start-up sequence Fault Investigation Possible cause Reference
2 Issue Enable
Operation
command Alarm occurs. (Note)
Servo motor shaft is not
servo-locked.
(Servo motor shaft is
free.) When on CC-Link IE Field
Network Basic, check the status
of RX (n + 3) F (Cyclic
communication ready).
When on the other
communication, check the data in
which the servo amplifier
responds. When on CC-Link IE Field Network
Basic, RX (n + 3) F is not turned
on.
When on the other communication,
the data sent to the servo amplifier
has an error.
3 Perform a home
position return. Servo motor does not
rotate. Check the status of LSP (Forward
rotation stroke end) and LSN
(Reverse rotation stroke end). LSP and LSN are off.
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
4.2.1
When TLA (Analog torque limit) is
usable, check the input voltage on
MR Configurator2. Torque limit level is too low for the
load torque.
The home position
return is not completed. Check the on/off status of DOG
(Proximity dog). The proximity dog is set
incorrectly.
4 Switch on
"Controlword bit 4
(New set-point)". Servo motor does not
rotate. Check the status of LSP (Forward
rotation stroke end) and LSN
(Reverse rotation stroke end). LSP and LSN are off.
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
4.2.1
When TLA (Analog torque limit) is
usable, check the input voltage on
MR Configurator2. Torque limit level is too low for the
load torque.
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-_C
Chapter 6
Large load inertia
moment causes the
servo motor shaft to
oscillate side to side. If the servo motor can be run
safely, repeat acceleration and
deceleration three times or more
to complete auto tuning. Gain adjustment fault MR-JE-_C
Chapter 6
Note. Refer to "MELSERVO-JE Servo Amplifier Instruction Manual (Troubleshooting)" for details of alarms and warnings.