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Alarms and Warnings
Display
37
45
46
50
Tab. 9-2: Failure corrective action (4)
MELSERVO J2-Super
Error
Definition
Parameter error
Parameter setting is
wrong.
Main circuit device
Main circuit device
overheat
overheat.
Servo motor
Servo motor
overheat
temperature rise
actuated the thermal
protector.
Overload 1
Overload of servo
amplifier
Load ratio
300%: > 2.5s
Load ratio
200%: > 100s
Cause
1. Servo amplifier fault caused the
parameter setting to be rewritten.
2. There is a parameter whose value
was set to outside the setting range by
the controller
1. Servo amplifier faulty
2. The power supply was turned on
and off continuously by overloaded
status.
3. Air cooling fan of servo amplifier
stops.
1. Ambient temperature of servomotor
is over 40°C.
2. Servo motor is overloaded.
3. Thermal protector in encoder is
faulty.
1. The output current exceeds the
rated current continuously.
2. Servo system is unstable.
3. Mechanical overload
4. Wrong connection of servo motor.
Servo amplifiers output terminals U, V,
W do not match servo motors input
terminals U, V, W.
5. Encoder error
Troubleshooting
Action
Change the servo
amplifier
Change the
parameter value to
within the setting
range
Change the servo
amplifier
Check control
mode
1. Change the
servo amplifier or
cooling fan
2. Observe max.
permitted ambient
temperature
When planning the
system ensure that
the ambient
temperature is
always between 0
and 40 °C.
1. Reduce load
2. Extended cycle
time
3. Use servo motor
that provide larger
output
Change servo
motor
1. Reduce load
2. Extended cycle
time
3. Use servo motor
that provide larger
output
1. Repeat
acceleration/
deceleration to
execute auto tuning
2. Change auto
tuning response
setting
3. Set auto tuning
to OFF and make
adjustment
manually
1. Ensure that
mechanical
components run
smoothly
2. Install limit
switches
Connect correctly
Change the servo
motor
9 - 7
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