Trouble Which Does Not Trigger Alarm/Warning - Mitsubishi Electric MELSERVO-J4 Instruction Manual Trouble Shooting

1. TROUBLESHOOTING

1.4 Trouble which does not trigger alarm/warning

The following example shows possible causes which do not trigger alarm or warning. Remove each cause
referring this section.
Description
The display shows "AA".
POINT
When the servo amplifier, servo motor, or encoder malfunctions, the following
status may occur.
Possible cause
The power of the servo
system controller was turned
off.
A SSCNET III cable was
disconnected.
The power of the servo
amplifier was turned off.
The amplifier-less operation
function of servo system
controller is enabled.
A CC-Link IE cable was
disconnected.
Check result
Check the power of the servo
system controller.
Check if "AA" is displayed in
the corresponding axis and
following axes.
Check if the connectors
(CNIA, CNIB) are unplugged.
Check if "AA" is displayed in
the corresponding axis and
following axes.
Check if the amplifier-less
operation function of servo
system controller is enabled.
Check if "AA" is displayed in
the corresponding axis and
following axes.
Check if the connectors
(CN10A, CN10B) are
unplugged.
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Action
Switch on the power of the
servo system controller.
Replace the SSCNET III
cable of the corresponding
axis.
Connect it correctly.
Check the power of the servo
amplifier.
Disable the amplifier-less
operation function.
Replace the CC-Link IE
cable of the corresponding
axis.
Connect it correctly.
Target
[B]
[WB]
[RJ010]