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

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)

1.6 Trouble which does not trigger alarm/warning

The following example shows possible causes which do not trigger alarm or warning. Remove each cause
referring to this section.
Description
The display shows "AA".
Description
The display shows "Ab".
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 control circuit power of
the previous axis servo
amplifier was turned off.
The amplifier-less operation
function of servo system
controller is enabled.
An Ethernet cable was
disconnected.
Possible cause
A controller, which is not
compatible with the servo
amplifier, has been
connected.
The axis is disabled.
The setting of the axis No. is
incorrect.
Axis No. does not match with
the axis No. set to the servo
system controller.
Information about the servo
series has not set in the
simple motion module.
Communication cycle does
not match.
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 or CN1A/
CN1B) are unplugged.
Check result
Check if a controller, which is
not compatible with the servo
amplifier, is connected.
Check if the disabling control
axis switch is on.
[B]: SW2-2
[WB]: SW2-2 to 2-4
Check that the other servo
amplifier is not assigned to
the same axis No.
Check the setting and axis
No. of the servo system
controller.
Check the value set in Servo
series (Pr. 100) in the simple
motion module.
Check the communication
cycle at the servo system
controller side.
When using 8 axes or less:
0.222 ms
When using 16 axes or less:
0.444 ms
When using 32 axes or less:
0.888 ms
1 - 116
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 Ethernet cable of
the corresponding axis.
Connect it correctly.
Action
Connect a compatible
controller.
Turn off the disabling control
axis switch.
Set it correctly.
Set it correctly.
Set it correctly.
Set it correctly.
Target
[B]
[WB]
[RJ010]
[GF]
Target
[B]
[WB]