Mitsubishi Electric MELSEC-Q QD75M User Manual page 699

15 TROUBLESHOOTING
LED
Classifi-
Error indicator
cation of
code of servo
errors
amplifier
2025 25
2030 30
Servo
amplifier
errors
2031 31
Error name
Absolute position data in error.
Absolute position
lost
Power was switched on for the first
time in the absolute position detection
system.
Permissible regenerative power of the
built-in regenerative brake resistor or
regenerative brake option is
exceeded.
Regenerative
error
Regenerative transistor fault
Cooling fan stopped.
Speed has exceeded the
Overspeed
instantaneous permissible speed.
Description
15 - 36
MELSEC-Q
Cause
Voltage low in the super capacitor in
the encoder.
Battery voltage low.
Battery cable or battery fault.
Super capacitor of the absolute
position encoder is not charged.
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.
Built-in regenerative brake resistor
or regenerative brake option faulty.
Unusual overheat due to cooling fan
stop.
Small acceleration/deceleration
time constant caused overshoot to
be large.
Servo system is instable to cause
overshoot.