12 Troubleshooting
12 - 16
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
When an error or warning occurs, the error number is displayed on the 7-segment LED display the front
of the Servo Drive.
12-5-1 Troubleshooting Using Error Displays
Error List
Error No.
Name Cause Measures
Main
(hex)
Sub
(hex)
12 00 Overvoltage
Error
The main circuit power
supply voltage (P-N
voltage) exceeded the
operation guarantee
range.
The P-N voltage
exceeded the specified
value.
Input the correct voltage.
The input voltage
increased.
Use appropriately external devices
such as UPS.
The Regeneration
Resistor wiring is bro-
ken.
If a resistance value of the external
resistor is infinite between the ter-
minal B1 and B2 of the Servo Drive,
the wiring is broken. Replace the
external resistor.
The External Regenera-
tion Resistor is set or
selected inappropriately.
Confirm the necessary regeneration
processing capacity, and connect
an appropriate External Regenera-
tion Resistor. Also, set the parame-
ters of the External Regeneration
Resistor to the resistance value of
the External Regeneration Resistor
in use.
P-N voltage increased
because a noise of a
Servo Drive during
Servo ON interrupted to
a Servo Drive during
Servo OFF.
When several Servo Drives are
used, DO NOT bundle motor power
cables.
Wire so that inductance of the
power supply cable is smaller.
You can find effect of improvement
once a noise filter is set to the
power line. Use one noise filter for
each Servo Drive.
You can find effect of improvement
once an External Regeneration
Resistor is set to a Servo Drive with
non built-in a Regeneration Resis-
tor.
Servo Drive failure If this event occurs again after you
performed all corrections shown
above, replace the Servo Drive.
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