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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.
3. Noise entered the SSCNET cable.
2034 34 CRC error
SSCNET cable
communication error
4. The terminal connector is disconnected.
1. Command pulse frequency too high.
2035 35
Command pulse
frequency alarm
Input command pulse is
too high.
2. Noise entered the command pulse.
1. SSCNET cable is disconnected.
2. SSCNET cable fault.
3. Printed board H-C10 fault.
2036 36 Transfer error
SSCNET cable or
printed board fault
4. The terminal connector is disconnected.
1. Servo amplifier fault caused the parameter setting to be rewritten.
2037 37 Parameter error Parameter setting error
2. Mis-setting of servo amplifier parameter data
2042 42 Feedback alarm Encoder signal is faulty. Encoder faulty.
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.
3. Thermal protector in encoder is faulty.
2046 46
Servomotor
overheat
Servomotor temperature
rise actuated the thermal
protector.
4. Air cooling fan of servomotor stopped.
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.
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