Mitsubishi Electric MR-J2M-P8B Instruction Manual page 131

9. TROUBLESHOOTING
Display
Name
IFU DRU
FA.37 IFU parameter
error
@A.37# DRU parameter
error
FA.38 DRU parameter
adjustment
error
@A.45# Main circuit
device overheat
@A.46# Servo motor
overheat
@A.50# Overload 1
Definition
IFU parameter setting 1. Interface unit fault caused the IFU
is wrong. parameter setting to be rewritten.
2. There is a IFU parameter whose
value was set to outside the setting
range by the controller.
3. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc
DRU parameter 1. Drive unit fault caused the DRU
setting is wrong. parameter setting to be rewritten.
2. There is a DRU parameter whose
value was set to outside the setting
range by the controller.
In some drive unit, the There is a drive unit whose DRU
parameter which parameter No. 2 or 23 setting is
requires all axes to be different from others.
set for the same value
differs from those of
the other axes.
Main circuit device 1. Drive unit faulty.
overheat.
2. The power supply was turned on
and off continuously by overloaded
status.
3. Air cooling fan of drive unit stops.
Servo motor 1. Ambient temperature of servo motor
temperature rise is over 40 .
actuated the thermal
sensor.
2. Servo motor is overloaded.
3. Thermal sensor in encoder is faulty. Change servo motor.
Load exceeded 1. Drive unit is used in excess of its
overload protection continuous output current.
characteristic of servo
amplifier.
2. Servo system is instable and
hunting.
3. Machine struck something.
4. Wrong connection of servo motor.
Drive unit's output U, V, W do not
match servo motor's input U, V, W.
5. Encoder faulty.
When the servo motor shaft is
rotated with the servo off, the
cumulative feedback pulses do
not vary in proportion to the
rotary angle of the shaft but the
indication skips or returns midway.
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Cause
Checking method
9 - 7
Action
Change the interface unit.
Change the IFU parameter value
to within the setting range.
Change the servo amplifier.
Change the drive unit.
Change the DRU parameter
value to within the setting range.
Make correct setting.
Change the drive unit.
The drive method is reviewed.
1. Change the drive unit or
cooling fan.
2. Reduce ambient temperature.
Review environment so that
ambient temperature is 0 to
40 .
1. Reduce load.
2. Review operation pattern.
3. Use servo motor that provides
larger output.
1. Reduce load.
2. Review operation pattern.
3. Use servo motor that provides
larger output.
1. Repeat acceleration/
deceleration to execute auto
tuning.
2. Change auto tuning response
level setting.
3. Set auto tuning to OFF and
make gain adjustment
manually.
1. Review operation pattern.
2. Install limit switches.
Connect correctly.
Change the servo motor.