Troubleshooting At Power On - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

8.4

Troubleshooting at power on

When an error occurs at the power supply of the controller or servo amplifier, improper boot of the servo amplifier might be the
cause. Check the display of the servo amplifier, and take actions according to this section.
Displ Description
ay
AA The power of the controller was
turned off.
Ab Initialization communication
with the controller has not
completed.
AC The synchronous
communications by specified
cycle could not be made.
*1
b##. The system has been in the
*1
C##. test operation mode.
*1
d##.
off Operation mode for
manufacturer setting is set.
*1 ## indicates station No.
Cause Checkpoint
The power of the controller Check the power of the controller.
was turned off.
An Ethernet cable was "AA" is displayed in the corresponding
disconnected. station and following stations.
Check if the connectors (CNIA, CNIB)
are unplugged.
An Ethernet cable was "Ab" is displayed in the corresponding
disconnected. station and following stations.
The power of the servo Check the power of the controller.
amplifier was switched on
when the power of the
controller was off.
The servo amplifier is "Ab" is displayed in the corresponding
malfunctioning. station and following stations.
The controller is Replace the controller, and then check
malfunctioning. the repeatability.
The setting of the station No. Check that a device is not assigned to
is incorrect. the same station No.
Station No. does not match Check the controller setting and station
with the station No. set to the No.
controller.
The communication cycle Check the communication cycle at the
does not match. controller side.
The servo amplifier parameter Check the following parameter settings.
setting is incorrect. [Pr. PN03]
[Pr. PD41]
Data link was established Network configuration was changed.
again.
The controller setting is Check the controller setting.
incorrect.
The servo amplifier is "AC" is displayed in the corresponding
malfunctioning. station and following stations.
The controller is Replace the controller, and then check
malfunctioning. the repeatability.
Test operation mode has been Test operation select switch (SW1-1) is
enabled. turned on.
Operation mode for Check that the test operation select
manufacturer setting is switch (SW1-1) and manufacturer
enabled. setting switch (SW1-2) are not on.
Action
Switch on the power of the controller.
Replace the Ethernet cable of the
corresponding station.
Connect it correctly.
Replace the Ethernet cable of the
corresponding station.
Switch on the power of the controller.
Replace the servo amplifier.
Replace the controller.
Set it correctly.
Set it correctly.
Set it correctly.
Set it correctly.
After checking the network
configuration, cycle the power of the
servo amplifier.
Set it correctly.
Replace the servo amplifier.
Replace the controller.
Turn off the test operation select
switch (SW1-1).
Set the auxiliary station number
setting switch (SW1) correctly.
8 TROUBLESHOOTING
8.4 Troubleshooting at power on
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