Mitsubishi Electric MR-J2S-A Instruction Manual page 208

10. 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. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc.
4.The alarm code output (parameter
No. 49) was set by the absolute
position detection system.
5.The alarm code output (parameter
No.49) was set with the
electromagnetic brake interlock
(MBR) assigned to pin CN1B-19.
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.
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.
10 - 11
WWW.NNC.IR
Cause
Change the servo amplifier.
Set parameter No.0 correctly.
Change the servo amplifier.
The absolute position detection system
and the alarm code output function are
exclusive. Set as either one of the two is
used.
The signal assignment function of the
electromagnetic interlock (MBR) to pin
CN1B-19 and the alarm code output
function are exclusive. Set as either one of
the two is used.
Change the servo amplifier.
The drive method is reviewed.
1. Exchange the cooling fan or the servo
amplifier.
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
output.
Change the servo motor.
1. Reduce load.
2. Review operation pattern.
3. Use servo motor that provides larger
output.
1. Repeat acceleration/
deceleration to execute auto tuning.
2. Change the auto tuning response
setting.
3. Set auto tuning to OFF and make gain
adjustment manually.
1. Review operation pattern.
2. Install limit switches.
Connect correctly.
Change the servo motor.
Action
(32 to 104 ).