Mitsubishi Electric MELSERVO MR-J2 C Series, Инструкция по эксплуатации

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11 - 7
11. TROUBLESHOOTING
Display Name Definition Cause Action
A.50 Overload 1 Load exceeded
overload protection
characteristic of
servo amplifier.
Load ratio 300%:
2.5s or more
Load ratio 200%:
100s or more
5. Encoder faulty.
Checking method
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.
Change the servo motor.
1. Machine struck something. 1. Review operation pattern.
2. Install limit switches.
2. Wrong connection of servo motor.
Servo amplifier's output terminals U,
V, W do not match servo motor's input
terminals U, V, W.
Connect correctly.
3. Servo system is instable and hunting. 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.
A.51 Overload 2 Machine collision or
the like caused max.
output current to
flow successively for
several seconds.
Servo motor locked:
1s or more
4. Encoder faulty.
Checking method
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.
Change the servo motor.
1. Acceleration/deceleration time constant
is too small.
Increase the
acceleration/deceleration time
constant.
2. Torque limit value (parameter No.28)
is too small.
Increase the torque limit value.
3. Motor cannot be started due to torque
shortage caused by power supply
voltage drop.
1. Review the power supply
capacity.
2. Use servo motor which
provides larger output.
4. Position control gain 1 (parameter
No.7) value is small.
Increase set value and adjust to
ensure proper operation.
5. Servo motor shaft was rotated by
external force.
1. When torque is limited,
increase the limit value.
2. Reduce load.
3. Use servo motor that provides
larger output.
A.52 Error excessive Droop pulse value of
the deviation counter
exceeded 80k pulses.
6. Machine struck something. 1. Review operation pattern.
2. Install limit switches.
7. Encoder faulty Change the servo motor.
8. Wrong connection of servo motor.
Servo amplifier's output terminals U,
V, W do not match servo motor's input
terminals U, V, W.
Connect correctly.
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