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MELSEC-Q
15 TROUBLESHOOTING
Classifica
tion of
errors
Error
code
LED
indicator
of servo
amplifier
Error name Description Cause
Small acceleration/deceleration
time constant caused overshoot to
be large.
Servo system is instable to cause
overshoot.
2031 31 Overspeed
Speed has exceeded the
instantaneous permissible speed.
Fault in the encoder.
Output phases U, V, W phase of the
servo amplifier were connected with
each other.
Transistor of the servo amplifier
damaged.
Short circuit in the servo amplifier
out put phase U, V, W phase.
Servo
amplifier
errors
2032 32 Overcurrent
Current that flew is higher than the
permissible current of the servo
amplifier.
Noise entered the overcurrent
detection circuit.
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