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MELSEC-A
14 TROUBLESHOOTING
Error
code
Servo
amplifier
LED display
Name and definition Occurrence factor
1. The command speed exceeded the permissible speed.
2. The acceleration/deceleration time constant is so small that
overshoot occurs.
3. The servo system is instable to cause overshoot.
4. " Pr.103 Motor type" or " Pr.105 Motor speed" setting error
2031 31
Overspeed
Motor speed reached or exceeded the
permissible speed.
5. Encoder faulty.
1. Output phases U, V and W of the servo amplifier were connected
with each other.
2. Servo amplifier transistor damaged.
3. Ground fault occurred in the servo amplifier output phases U, V,
W.
2032 32
Overcurrent
Current not less than the permissible value
flew in the servo amplifier bus.
4. Noise entered the overcurrent detection circuit.
1. Regenerative brake resistor connection fault.
2. Regenerative power transistor damaged.
3. Regenerative brake resistor in the servo amplifier switched OFF.
2033 33
Overvoltage
Converter bus voltage reached or
exceeded 400V.
4. Power supply voltage high.
SSCNET cable is disconnected.
SSCNET cable fault.
Noise entered the SSCNET cable .
2034 34
CRC error
Command cable fault
The terminal connector is disconnected.
1. Command pulse frequency too high.
2035 35 Command pulse frequency alarm
2. Noise entered the command pulse.
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