LNS QUICK LOAD SERVO S3 Troubleshooting And Spare Parts Manual page 44

Chapter 1: Alarms
Display Name
AL.45 Main circuit
device overheat
AL.46 Servo motor
overheat
AL.50 Overload 1
AL.51 Overload 2
Definition
Main circuit device 1. Servo amplifier faulty.
overheat
2. The power supply was turned
on and off continuously by
overloaded status.
3. Air cooling fan of servo
amplifier stops.
Servo motor 1. Ambient temperature of servo
temperature rise
motor is over 40°C.
actuated the
2. Servo motor is overloaded.
thermal protector.
3. Thermal protector in encoder is
faulty.
Load exceeded 1. Servo amplifier is used in
overload protection excess of its continuous output
characteristic of current.
servo amplifier.
2. Servo system is instable and
Load ratio 300%:
hunting.
2.5s or more
Load ratio 200%:
100s or more
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.
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.
Machine collision or 1. Machine struck something.
the like caused
max. output current
2. Wrong connection of servo
to flow successively
motor. Servo amplifier's output
for several
terminals U, V, W do not match
seconds.
servo motor's input terminals U, V,
W.
Servo motor
3. Servo system is instable and
locked: 1s or more
hunting.
4. Encoder faulty.
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.
The drive method is reviewed.
1. Exchange the cooling fan or the
servo amplifier.
2. Reduce ambient temperature.
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
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.
Checking method
1. Review operation pattern.
2. Install limit switches.
Connect correctly.
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.
Change the servo motor.
Checking method
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Action
QUICK LOAD SERVO S3