Mitsubishi Electric MELSERVO MR-J3 A Series, Инструкция по эксплуатации

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9 - 7
9. TROUBLESHOOTING
Display Name Definition Cause Action
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 setting.
3. Set auto tuning to OFF and make gain
adjustment manually.
AL.51 Overload 2 Machine collision or
the like caused
max. output current
to flow successively
for several seconds.
Servo motor locked:
1s or more
During rotation:
2.5s 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.
AL.52 Error excessive
1. Acceleration/deceleration time
constant is too small.
Increase the acceleration/deceleration time
constant.
2. Forward torque limit (parameter
No.PA11) or reverse torque limit
(parameter No.PA12) are 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.
The difference
between the model
position and the
actual servomotor
position exceeds
three rotations.
(Refer to the
function block
diagram in section
1.2.)
4. Position loop gain 1 (parameter
No.PB08) 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.
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.
AL.8A 1. Communication cable breakage. Repair or change communication cable Serial
communication
time-out error
2. Communication cycle longer than
regulated time.
Shorten the communication cycle.
Communication
stopped for longer
than the specified
time.
3. Wrong protocol. Correct protocol.
AL.8E 1. Communication cable fault
(Open cable or short circuit)
Repair or change the cable. Serial
communication
error Serial
communication
error occurred
between servo
amplifier and
communication
device (e.g.
personal computer).
2. Communication device (e.g.
personal computer) faulty
Change the communication device (e.g.
personal computer).