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MELSEC-Q
15 TROUBLESHOOTING
LED indicator
of servo
amplifier
Classifica
tion of
errors
Error
code
IFU DRU
Error name Description Cause
2038
FA.38 —
DRU
adjustment
error
In some drive unit, the
parameter which requires all
axes to be set for the same
value differs from those of the
other axes.
There is a drive unit whose DRU
parameter
"
Pr.102
"or "
Pr.123
"
setting is different from others.
Air cooling fan of the drive unit
stops
The power supply was turned on
and off continuously by overloaded
status.
2045
— @A.45#
Main circuit
device
overheat
Main circuit device overheat.
Drive unit faulty.
Servo motor ambient temperature
exceeded the operating value of
40°C.
Servomotor overloaded.
2046
— @A.46#
Servomotor
heated
Servo motor temperature rise
actuated the thermal protector.
Thermal protector in encoder is
faulty.
The current exceeded the
continuous output current of the
drive unit.
The servo system is unstable,
causing hunting.
Collision with the machine.
Servomotor miswiring drive unit
terminals U, V, W phase do not
mach motor terminals U, V, W
phase.
Servo
amplifier
errors
2050
— @A.50#
Overload 1
Load exceeded overload
protection characteristic of drive
unit.
Load ratio 300%: 1s or more
Load ratio 200%: 10s or more
The motor encoder fault.
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