Mitsubishi Electric MR-J2S-CP Instruction Manual page 238

11. TROUBLESHOOTING
Display Name
AL.37 Parameter Parameter setting is
error wrong.
AL.45 Main circuit Main circuit device
device overheat overheat
AL.46 Servo motor Servo motor
overheat temperature rise
actuated the
thermal sensor.
AL.50 Overload 1 Load exceeded
overload protection
characteristic of
servo amplifier.
Definition
1. Servo amplifier fault caused the
parameter setting to be rewritten.
2. Regenerative option not used with
servo amplifier was selected in
parameter No.0.
3. Value outside setting range has
been set in some parameter.
4. Value outside setting range has
been set in electronic gear.
5. Opposite sign has been set in
software limit increasing side
(parameters No. 46, 47). Similarly,
opposite sign has been set in
software limit decreasing side
(parameters No. 48, 49).
6. Opposite sign has been set in
position range output address
increasing side (parameters No. 50,
51). Similarly, opposite sign has
been set in position range output
address decreasing side
(parameters No. 52, 53).
7. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, program write,
etc.
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 servo
motor is over 40
2. Servo motor is overloaded.
3. Thermal sensor in encoder is faulty. Change servo motor.
1. Servo amplifier is used in excess of
its continuous output current.
2. Servo system is instable and
hunting.
3. Machine struck something.
4. Wrong connection of servo motor.
Servo amplifier's output terminals
U, V, W do not match servo motor's
input terminals U, V, W.
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.
Cause
Change the servo amplifier.
Set parameter No.0 correctly.
Set the parameter correctly.
Set parameters No. 4, 5 correctly.
Set parameters No. 46 to 49 correctly.
Set parameters No. 50 to 53 correctly.
Change the servo amplifier.
Change the servo amplifier.
The drive method is reviewed.
1. Exchange the cooling fan or the servo
2. Reduce ambient temperature.
Review environment so that ambient
(104 ). temperature is 0 to 40
1. Reduce load.
2. Review operation pattern.
3. Use servo motor that provides larger
1. Reduce load.
2. Review operation pattern.
3. Use servo motor that provides larger
1. Repeat acceleration/
2. Change auto tuning response setting.
3. Set auto tuning to OFF and make gain
1. Review operation pattern.
2. Install limit switches.
Connect correctly.
Change the servo motor.
11 - 7
Action
amplifier.
(32 to 104 ).
output.
output.
deceleration to execute auto tuning.
adjustment manually.