Mitsubishi Electric MELSERVO MR-J2-A Product Specifications And Installation Manual page 202

8. TROUBLESHOOTING
Alarm Code
Display
CN1B- CN1A- CN1A-
19 pin 18 pin 19 pin
A. 35 1 0
A. 37 0 0
A. 46 0 1
A. 50 1
0
Name Definition
1 Command Input command
pulse alarm pulses are too
high.
0 Parameter Parameter
error setting is wrong.
1 Servo motor Servo motor
overheat temperature rise
actuated the
thermal
protector.
1 Overload 1 Load exceeded
overload
protection
characteristic of
servo amplifier.
Load ratio 300%:
2.5s or more
Load ratio 200%:
100s or more
Cause
1. Command pulse frequency is
too high.
2. Noise entered command pulses. Take measures
3. Command unit faulty.
1. Servo amplifier fault caused the
parameter setting to be
rewritten.
2. Regenerative brake option not
used with servo amplifier was
selected in parameter No. 0.
1. Ambient temperature of servo
motor is over 40°C.
2. Servo motor is overloaded.
3. Thermal protector 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.
8– 10
Action
Reduce the command
pulse frequency to
proper value.
against noise.
Change the
command unit.
Change the
servo amplifier.
Set parameter
No. 0 correctly.
Review environment
so that ambient
temperature is
0 to 40°C.
1. Reduce load.
2. Review operation
pattern.
3. Use servo motor
that provides
larger output.
Change 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 auto
tuning response
level setting.
3. Set auto tuning to
OFF and make
gain adjustment
manually.
1. Review
operation
pattern.
2. Install limit
switches.