11 - 5
11. TROUBLESHOOTING
Display
Name
Definition
Cause
Action
1. Wrong setting of parameter No. 0
Set correctly.
2. Built in regenerative brake resistor or
regenerative brake option is not
connected.
Connect correctly
3. High-duty operation or continuous
regenerative operation caused the
permissible regenerative power of the
regenerative brake option to be
exceeded.
Checking method
Call the status display and check
the regenerative load ratio.
1. Reduce the frequency of
positioning.
2. Use the regenerative brake
option of larger capacity.
3. Reduce the load.
Permissible
regenerative power
of the built-in
regenerative brake
resistor or
regenerative brake
option is exceeded.
Power supply voltage is abnormal.
MR-J2- C: 260V or more
Review power supply
4. Regenerative transistor faulty.
Checking method
1) The regenerative brake option
has overheated abnormally.
2) The alarm occurs even after
removal of the built-in
regenerative brake resistor or
regenerative brake option.
Change the servo amplifier.
Regenerative
transistor fault
5. Built-in regenerative brake resistor or
regenerative brake option faulty.
Change servo amplifier or
regenerative brake option.
A.30
Regenerative
alarm
Cooling fan stop
(MR-J2-200C 350C)
6. Unusual overheat due to cooling fan
stop
1. Change the servo amplifier or
cooling fan.
2. Reduce ambient temperature.
1. Input command pulse frequency
exceeded the permissible instantaneous
speed frequency.
Set command pulses correctly.
2. Small acceleration/deceleration time
constant caused overshoot to be large.
Increase
acceleration/deceleration time
constant.
3. Servo system is instable to cause
overshoot.
1. Re-set servo gain to proper
value.
2. If servo gain cannot be set to
proper value:
1) Reduce load inertia
moment ratio; or
2) Reexamine acceleration/
deceleration time constant.
A.31
Overspeed
Speed has exceeded
the instantaneous
permissible speed.
4. Encoder faulty.
Change the servo motor.
1. Short occurred in servo amplifier
output phases U, V and W.
Correct the wiring.
2. Transistor (IPM) of the servo amplifier
faulty.
Checking method
Alarm (A.32) occurs if power is
switched on after disconnection
of the U, V, W power cables.
Change the servo amplifier.
3. Ground fault occurred in servo
amplifier output phases U, V and W.
Correct the wiring.
A.32
Overcurrent
Current that flew is
higher than the
permissible current
of the servo
amplifier.
4. External noise caused the overcurrent
detection circuit to misoperate.
Take noise suppression
measures.
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Содержание MELSERVO MR-J2 C Series
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