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If an Error Code Is Displayed on SmartStacker
Code
A250 Gate Sliding Servo Amplifier: 3900-3999
Overcurrent 1
(Amplifier display: oc1)
3901
The output current of the servo amplifier exceeds
the rated value. Direct detection by internal
transistor of servo amplifier
Overcurrent 2
(Amplifier display: oc2)
3902
The output current of the servo amplifier exceeds
the rated value. Indirect detection with software of
servo amplifier
Overspeed
(Amplifier display: oS)
3903
The rotation speed of the servo motor exceeds
1.1 times the maximum speed.
Control power undervoltage
(Amplifier display: Lvc)
3904
The power supplied to the servo amplifier falls
below the minimum specification voltage limit.
Overvoltage
(Amplifier display: Hv)
3905
The DC voltage inside the servo amplifier
exceeds the upper limit.
Encoder trouble 1
(Amplifier display: Et1)
3906
There is a fault in the encoder built in the servo
motor. (Single revolution position detection fault
of encoder)
Encoder trouble 2
(Amplifier display: Et2)
3907
There is a fault in the encoder built in the
servo motor. (Detection is made at the internal
electronic thermal relay of the servo amplifier.)
Circuit trouble
(Amplifier display: ct)
3908
There is a fault in the supply power voltage inside
the servo amplifier. There may be a failure in the
internal circuit.
268
Description and Causes
Solutions
If this error occurs frequently, call your local
dealer.
Turn off the power. Wait about 30 minutes and
turn on the power again. If this error occurs
frequently, call your local dealer.
SmartStacker User's Manual
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