Mitsubishi Electric MELSEC-Q QD75M User Manual page 743

15 TROUBLESHOOTING
LED indicator
Classifica
of servo
Error
tion of
amplifier
code
errors
IFU
2030 FA.30
Servo
amplifier
errors
2031 —
2032 —
Error name
DRU
Permissible regenerative power
of the built-in regenerative brake
resistor or regenerative brake
option is exceeded.
Regenerative
—
error
Regenerative transistor fault
Speed has exceeded the
instantaneous permissible
@A.31# Overspeed
speed.
Current that flew is higher than
@A.32# Overcurrent the permissible current of the
drive unit.
Description
15 - 80
MELSEC-Q
Cause
Parameter " Pr.102 Regenerative
brake resistor" setting value error.
Built-in regenerative brake resistor
or regenerative brake option is not
connected.
High-duty operation or continuous
regenerative operation caused the
permissible regenerative power of
the regenerative brake option to be
exceeded.
Power supply voltage is abnormal.
(260VAC or more)
Regenerative brake option faulty.
Regenerative transistor faulty.
Small acceleration/deceleration
time constant caused overshoot to
be large.
Servo system is instable to cause
overshoot.
Fault in the encoder.
Output phases U, V, W phases of
the drive unit were connected with
each other.
Transistor of the drive unit
damaged.
Short circuit in the drive unit out put
phase U, V, W phases.
Noise entered the overcurrent
detection circuit.