Mitsubishi Electric MELSERVO-J4 Instruction Manual page 127

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Description
The servo motor does not
operate.
The speed of the servo motor
or linear servo motor is not
increased. Or the speed is
increased too much.
Possible cause
The ABS transfer mode is
selected when the absolute
position detection system is
used.
The settings of the electronic
gear are incorrect.
The setting of point tables is
incorrect.
The setting of the point table
No. selection is incorrect.
Wiring or the command pulse
multiplication setting is
incorrect.
Power is not supplied to the
MR-HDP01 manual pulse
generator.
Power is not supplied to OPC
(power input for open-
collector sink interface).
Power is not supplied to OPC
(power input for open-
collector sink interface).
The axis is disabled.
An error is occurring on the
servo system controller side.
The setting of a parameter is
incorrect on the servo
system controller side.
The position command is not
inputted correctly.
The connection destination
of the encoder cable is
incorrect.
The setting of the speed
command, speed limit, or
electronic gear is not correct.
The connection of the servo
motor is incorrect.
The voltage of the main
circuit power supply has
dropped.
For a servo motor with an
electromagnetic brake, the
brake has not released.
Check result
Check if ABSM is on.
Check the setting value of
the electronic gear.
Check the point table setting. Review the point table setting.
Check the setting of the point
table No. selection (RWwn6).
When using an MR-HDP01
manual pulse generator,
check the wiring and the
command pulse multiplication
setting (assignment of TP0,
TP1 and [Pr. PT03] setting).
A power supply is not
connected between +5 V to
12 V and 0 V of MR-HDP01.
Between DICOM and OPC of
the CN1 connector of the
servo amplifier is not
connected.
Between DICOM and OPC of
the CN1 connector of the
servo amplifier is not
connected.
Check if the disabling control
axis switch is on.
[B]: SW2-2
[WB]: SW2-2 to 4
Check if an error is occurring
on the servo system
controller side.
Check the settings of
parameters on the servo
system controller side.
Check cumulative command
pulses using MR
Configurator2 and check if
numerical values are
changed by inputting the
command.
Check if the connection
destinations of CN2A, CN2B,
and CN2C are the same as
CNP3A, CNP3B, and
CNP3C.
Check the settings of the
speed command, speed limit,
and electronic gear.
Check the wiring of U/V/W.
Check if the voltage of the
main circuit power supply
dropped.
Check the power supply of
the electromagnetic brake.
1 - 120
Action
Turn off ABSM.
Set a proper value of the
electronic gear.
Review the setting of the
point table No. selection.
Review the wiring and the
command pulse
multiplication setting.
Connect a power supply
between +5 V to 12 V and 0
V of MR-HDP01.
Connect between DICOM
and OPC.
Connect between DICOM
and OPC.
Turn off the disabling control
axis switch.
Cancel the error of the servo
system controller.
Review the setting of the
parameter on the servo
system controller side.
Review the setting of the
servo system controller and
the servo program.
Connect encoder cables
correctly.
Review the settings of the
speed command, speed limit,
and electronic gear.
Connect it correctly.
Increase the voltage of the
main circuit power supply.
Turn on the electromagnetic
brake power.
Target
[A]
[A]
[GF]
[GF]
[A]
[B]
[WB]
[WB]
[A]
[B]
[WB]
[RJ010]
[GF]