5-11
Display
Countermeasures
Cause of error
Status when error
occurs
Error
Main circuit Power
S
S
Occurs when servo
Wiring wrong
Re-wire power supply.
Supply Setting
is turned on.
Pn001.2 setting
wrong
Change setting Pn001.2
Overvoltage
Occurs when power
supply is turned ON.
Main circuit power
supply voltage is
outside tolerance
range.
Change the main circuit
power supply voltage to
within tolerance range.
Occurs when Servo-
motor is decelerat-
ing.
Load inertia is too
great.
Deceleration time is too
long.
Calculate the regenera-
tive energy, and connect
an external Regeneration
Resistor with the required
regeneration absorption
capacity.
Main circuit power
supply voltage ex-
ceeds tolerance
range.
Reduce main circuit pow-
er supply voltage to with-
in tolerance range.
Occurs during de-
scent (vertical axis)
Gravitational torque
is too large.
Add a counterbalance to
the machinery to lower
gravitational torque.
Slow the descent speed.
Calculate the regenera-
tive energy, and connect
and external Regenera-
tion Resistor with the re-
quired regeneration ab-
sorption capacity.
Low voltage
Occurs when the
control circuit power
supply only is turned
ON.
Control panel error
Replace the Servo Driver.
Occurs when the
main circuit power
supply is turned ON.
Main circuit power
supply voltage is
outside tolerance
range.
Change the main circuit
power supply voltage to
within tolerance range.
Main circuit power
supply is damaged.
Replace the Servo Driver.
Troubleshooting
Chapter 5
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