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MELSEC-A
14 TROUBLESHOOTING
Error
code
Servo
amplifier
LED display
Name Definition Occurrence factor
1. SSCNET cable is disconnected.
2. SSCNET cable fault.
2036 36 Transfer error
SSCNET cable or
printed board fault
3. The terminal connector is disconnected.
1. Servo amplifier fault caused the parameter setting to be rewritten.
2037 37 Parameter error Parameter setting error
2. There is parameter set to outside setting range by AD75.
1. Servo amplifier faulty.
2. The power supply was turned ON and OFF continuously by
overloaded status.
2045 45
Main circuit
device overheat
Main circuit overheated
abnormally.
3. Air cooling fan of servo amplifier stopped.
1. Ambient temperature of servomotor is over 40°C.
2. Servomotor is overloaded.
2046 46
Servomotor
overheat
Servomotor temperature
rise actuated the thermal
protector.
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.
4. Wrong connection of servomotor.
Servo amplifier's output terminals U, V, W do not match
servomotor's input terminals U, V, W.
2050 50 Overload 1
Load exceeded overload
protection characteristic
of servo amplifier.
Load ratio 300%:
2.5s or more
Load ratio 200%:
100s or more
5. Encoder faulty.
1. Machine struck something.
2. Wrong connection of servomotor.
Servo amplifier's output terminals U, V, W do not match
servomotor's input terminals U, V, W.
3. Servo system is instable and hunting.
2051 51 Overload 2
Machine collision or like
caused max. output
current to flow
successively for several
seconds.
Servomotor locked:
1s or more
4. Encoder faulty.
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