5-12
Display CountermeasuresCause of errorStatus when error
occurs
Error
Overspeed Occurs when the
servo is ON.
Encoder signal be-
tween controllers is
wired incorrectly.
Rewire correctly.
Servomotor power
line is wired incor-
rectly.
Rewire correctly.
Occurs along with
high-speed rotation
when a command is
Position and speed
command inputs are
too large.
Input command values
correctly.
input.
Pn300 (speed com-
mand scale), and
Pn202 and Pn203
(electronic gear) set-
tings are too large.
Set the parameters cor-
rectly.
Speed limit is not
performed during
torque control.
Set Pn407 (speed limit)
Rotation limit has
been exceeded due
to overshooting.
Adjust the gain.
Lower the maximum spe-
cified speed.
Overload Occurs during op-
eration.
Running at over
245% of rated
torque (effective
torque).
Repair the Servomotor
shaft if it is locked.
If the Servomotor power
line is wired incorrectly,
rewire it correctly.
Lighten the load.
Lengthen the accelera-
tion and deceleration
times.
Adjust the gain.
Power supply volt-
age has fallen.
Check the power supply
voltage, and lower to
within tolerance range.
Overload Occurs during op-
eration.
Running at 120% to
245% of rated
torque (effective
torque).
Lighten the load.
Lengthen the accelera-
tion and deceleration
times.
Adjust the gain.
Power supply volt-
age has fallen.
Check the power supply
voltage, and lower to
within tolerance range.
Dynamic brake
overload
Occurs when the
servo is turned OFF
after operating.
Energy required for
stopping exceeds
the dynamic brake
resistor tolerance.
Lower the rotation speed.
Reduce the load inertia.
Reduce the frequency of
dynamic brake use.
Occurs when the
power supply is
turned ON.
Control panel error Replace the Servo Driver.
Troubleshooting Chapter 5
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