Mitsubishi Electric Melservo-J3 Series MR-J3-B, Instruction Manual

Page: 384 / 802

11 - 27
11. TROUBLESHOOTING
Description Check method Possible cause Action
Communication
with the servo
amplifier fails
using MR
Configurator. Check if they are on-line. They are off-line. Set them to on-line.
Select "On-line" in the "System setting"
of "Set up" menu.
Check if the communication cable
has any failure such as damage. Communication cable fault. Change the communication cable.
Check the communication
settings (Baud rate and ports).
Check with the "system setting"
command of "Set up" menu. The communication setting is incorrect. Set the communication correctly.
Check if the model selection is set
correctly.
Check with "system setting"
command of "Set up" menu The model being connected differs from
the model set in the model selection. Set the model correctly.
In the device manager on the
personal computer, check if
"MITSUBISHI MELSERVO USB
Controller" is being displayed
under the USB (Universal Serial
Bus) controller. The driver is not set. Delete an unknown device or other
devices, cycle the power of the servo
amplifier, and then set the driver again
according to Found New Hardware
Wizard.
For details refer to Help of MR
Configurator.
An abnormal
value is
displayed in the
monitor values of
MR Configurator. Check if the model selection is set
correctly.
Check with the "system setting"
command of "Setup" menu.
The model being connected differs from
the model set in the model selection. Set the model correctly.
For a servo
motor with an
electromagnetic
brake, the brake
went out. Remove the servo motor and all
the wiring from the machine, and
check if the servo motor shaft can
be rotated by the hands.
(If it is rotated by the hands, the
electromagnetic brake has a
failure.) Expiration of life or a failure of
electromagnetic brake.
For the life of electromagnetic brake,
refer to Servo Motor Instruction Manual
(Vol.2). Change the servo motor.
The coasting
distance of the
servo motor
became longer. Check if the load was increased. The load was increased and the
permissible load to motor inertia ratio of
the dynamic brake was exceeded.(Refer
to section 13.3.) 1. Reduce the load.
2. Replace the servo amplifier.
For the servo motor with an
electromagnetic brake.
1. Check if the external relay
connected to electromagnetic
brake interlock (MBR) operates
normally.
2. Check if the electromagnetic
brake is malfunctioning.
1. An external relay is malfunctioning.
2. The wiring of electromagnetic brake
interlock (MBR) is incorrect.
3. Expiration of life or a failure of
electromagnetic brake.
1. Replace the external relay.
2. Review the wiring.
3. Change the servo motor.