1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 116
1.6 Trouble which does not trigger alarm/warning
POINT
When the servo amplifier, servo motor, or encoder malfunctions, the following
status may occur.
The following example shows possible causes which do not trigger alarm or warning. Remove each cause
referring to this section.
Description
Possible cause
Check result
Action
Target
The display shows "AA".
The power of the servo
system controller was turned
off.
Check the power of the servo
system controller.
Switch on the power of the
servo system controller.
[B]
[WB]
A SSCNET III cable was
disconnected.
Check if "AA" is displayed in
the corresponding axis and
following axes.
Replace the SSCNET III
cable of the corresponding
axis.
Check if the connectors
(CNIA, CNIB) are unplugged.
Connect it correctly.
The control circuit power of
the previous axis servo
amplifier was turned off.
Check if "AA" is displayed in
the corresponding axis and
following axes.
Check the power of the servo
amplifier.
The amplifier-less operation
function of servo system
controller is enabled.
Check if the amplifier-less
operation function of servo
system controller is enabled.
Disable the amplifier-less
operation function.
An Ethernet cable was
disconnected.
Check if "AA" is displayed in
the corresponding axis and
following axes.
Replace the Ethernet cable of
the corresponding axis.
[RJ010]
[GF]
Check if the connectors
(CN10A/CN10B or CN1A/
CN1B) are unplugged.
Connect it correctly.
Description
Possible cause
Check result
Action
Target
The display shows "Ab".
A controller, which is not
compatible with the servo
amplifier, has been
connected.
Check if a controller, which is
not compatible with the servo
amplifier, is connected.
Connect a compatible
controller.
[B]
[WB]
The axis is disabled.
Check if the disabling control
axis switch is on.
[B]: SW2-2
[WB]: SW2-2 to 2-4
Turn off the disabling control
axis switch.
The setting of the axis No. is
incorrect.
Check that the other servo
amplifier is not assigned to
the same axis No.
Set it correctly.
Axis No. does not match with
the axis No. set to the servo
system controller.
Check the setting and axis
No. of the servo system
controller.
Set it correctly.
Information about the servo
series has not set in the
simple motion module.
Check the value set in Servo
series (Pr. 100) in the simple
motion module.
Set it correctly.
Communication cycle does
not match.
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
Set it correctly.
Содержание MELSERVO MR-J4-B-RJ Series
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