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MELSEC-A
14 TROUBLESHOOTING
Error
code
Servo
amplifier
LED display
Name Definition Occurrence factor
1. "
Pr.102
Regenerative brake resistor" setting error
2. Built-in regenerative brake resistor or regenerative brake option is
not connected.
3. High-duty operation or continuous regenerative operation caused
the permissible regenerative power of the regenerative brake
option to be exceeded.
Permissible regenerative
power of the built-in
regenerative brake
resistor or regenerative
brake option is
exceeded.
4. Power supply voltage is abnormal.
MR-J2S-
B: 260V or more
MR-J2S-
B1: 135V or more
5. Regenerative transistor faulty.
2030 30
Regenerative
error
Regenerative transistor
fault
6. Built-in regenerative brake resistor or regenerative brake option
faulty.
1. Small acceleration/deceleration time constant caused overshoot
to be large.
2. Servo system is instable to cause overshoot.
2031 31 Overspeed
Speed has exceeded the
instantaneous
permissible speed.
3. Encoder faulty.
1. Short occurred in servo amplifier output phases U, V and W.
2. Servo amplifier transistor faulty.
3. Ground fault occurred in servo amplifier output phases U, V and
W.
2032 32 Overcurrent
Current that flew is
higher than the
permissible current of
the servo amplifier.
4. External noise caused the overcurrent detection circuit to
misoperate.
1. Lead of built-in regenerative brake resistor or regenerative brake
option is open or disconnected.
2. Regenerative transistor faulty.
3. Wire breakage of built-in regenerative brake resistor or
regenerative brake option
4. Capacity of built-in regenerative brake resistor or regenerative
brake option is insufficient.
2033 33 Overvoltage
Input value of converter
bus voltage exceeded
400V.
5. Power supply voltage high.
1. SSCNET cable is disconnected.
2. SSCNET cable fault.
3. Noise entered the SSCNET cable.
4. The terminal connector is disconnected.
2034 34 CRC error
SSCNET cable
communication error
5. The same No. exists in the servo amplifier side axis setting.
1. Command of higher than servomotor maximum speed was given.
2. Noise entered the SSCNET cable.
2035 35
Command pulse
frequency alarm
Input command
frequency is too high.
3. AD75 faulty
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