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Chapter 5
Troubleshooting
Display
Error
a.910
Overload
a.911
Vibration
5-34
Status when
error occurs
Occurs when the
Servo is turned
ON.
Cause of error
Countermeasures
• Servomotor wiring is
• Correct the Servomotor
incorrect (faulty wiring or
wiring.
connections).
• Encoder wiring is incor- • Correct the encoder wirrect (faulty wiring or coning.
nections).
• Servo Driver is defective. • Replace the Servo
Driver.
• Servomotor wiring is
• Correct the Servomotor
Occurs without
Servomotor rotaincorrect (faulty wiring or
wiring.
tion by command
connections).
input.
• Encoder wiring is incor- • Correct the encoder wirrect (faulty wiring or coning.
nections).
• Recheck the load condi• The starting torque
exceeds the maximum
tions, the operating contorque.
ditions, and the
Servomotor capacity.
• Servo Driver is defective. • Replace the Servo
Driver.
Occurs during nor- • The effective torque
• Recheck the load condimal operation.
exceeds the rated torque. tions, the operating conditions, and the
Servomotor capacity.
• The temperature is high • Lower the temperature in
in the Servo Driver's
the panel to 55°C or less.
panel
• Servo Driver is defective. • Replace the Servo
Driver.
Occurs during nor- • The Servo Driver gain is • In order to set the correct
mal operation.
incorrect.
gain, lower the speed
loop gain (Pn100) and
the position loop gain
(Pn101), and increase filter time constants such
as the1st step 1st torque
command filter time constant (Pn401).
• The inertia ratio (Pn103) • Set a suitable value for
the inertia ratio (Pn103).
value is greater than the
actual value, or it is
greatly fluctuating.