Mitsubishi Electric MELSERVO-J4 MR-J4 TM Instruction Manual page 264

8. TROUBLESHOOTING
8.6 Troubleshooting at power on
When a system error occurs at power on of the controller, improper boot of the servo amplifier might be the
cause. Check the display of the servo amplifier, and take actions according to this section.
Display Description
000 The network module or
servo amplifier is
malfunctioning.
Ab Initialization
communication with the
controller has not
completed.
b##. The system has been in
the test operation mode.
(Note)
off Operation mode for
manufacturer setting is
set.
Note. ## indicates axis No.
Cause
The network module is Replace the network module, and
malfunctioning. then check the repeatability.
The servo amplifier is Replace the servo amplifier, and
malfunctioning. then check the repeatability.
The setting of the axis Check that the other servo
No. is incorrect. amplifier is not assigned to the
same axis No.
Axis No. does not match Check the setting and axis No. of
with the axis No. set to the controller.
the controller.
An Ethernet cable was "Ab" is displayed in the
disconnected. corresponding axis and following
axes.
Check if the connector is
unplugged.
The power of the servo "Ab" is displayed in the
amplifier was turned off. corresponding axis and following
axes.
The servo amplifier is "Ab" is displayed in the
malfunctioning. corresponding axis and following
axes.
The network module is "Ab" is displayed in the
malfunctioning. corresponding axis and following
axes.
Test operation mode has Test operation select switch
been enabled. (SW1-1) is turned on.
Operation mode for Check if all of the mode select
manufacturer setting is switches (SW1) are on.
enabled.
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Checkpoint
Replace the network module.
Replace the servo amplifier.
Set it correctly.
Set it correctly.
Replace the Ethernet cable of the
corresponding axis.
Connect it correctly.
Check the power of the servo
amplifier.
Replace the servo amplifier of the
corresponding axis.
Replace the network module of
the corresponding axis.
Turn off the test operation select
switch (SW1-1).
Set the mode select switches
(SW1) correctly.
Action