YASKAWA SGDV-180A - Page 8

A.450
Main-
Circuit
Capacitor
Overvoltage
A SERVOPACK fault
occurred.
--
Replace the SERVOPACK.
A.510
Overspeed
(The
servomotor
rotational
speed
exceeds
the
maximum.)
The order of phases U, V,
and W in the servomotor
wiring is incorrect.
Check the servomotor
wiring.
Confirm that the servomotor is
correctly wired.
A reference value exceeding
the overspeed detection
level was input.
Check the input value.
Reduce the reference value or
adjust the gain.
The motor speed exceeded
the maximum.
Check the servomotor
speed waveform.
Reduce the speed reference input
gain, adjust the servo gain, or
reconsider the operating conditions.
A SERVOPACK fault
occurred.
--
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.511
Overspeed
of
Encoder
Output
Pulse
Rate
The encoder output pulse
frequency exceeded the
limit.
Check the encoder
output pulse setting.
Decrease the setting of the encoder
output pulse (Pn212).
The encoder output pulse
output frequency exceeded
the limit because the
servomotor speed was too
high.
Check the encoder
output pulse output
setting and servomotor
speed.
Decrease the servomotor speed.
A.520
Vibration
Alarm
Abnormal vibration was
detected at the servomotor
speed.
Check for abnormal
noise from the
servomotor, and check
the speed and torque
waveforms during
operation.
Reduce the servomotor speed or
reduce the speed loop gain (Pn100).
The moment of inertia ratio
(Pn103) value is greater
than the actual value or is
greatly changed.
Check the moment of
inertia ratio.
Set the moment of inertia ratio
(Pn103) to an appropriate value.
A.521
Autotuning
Alarm
(Vibration
was
detected
while
executing
the
advanced
autotuning,
one-
parameter
tuning,
EasyFFT,
or tuning-
less
function.)
The servomotor vibrated
considerably while
performing tuningless
function (factory setting).
Check the servomotor
speed waveform.
Reduce the load so that the
moment of inertia ratio falls within
the allowable value, or raise the
tuning level using the tuning-less
levels setting (Fn200) or reduce the
load level.
The servomotor vibrated
considerably during
advanced autotuning, one-
parameter tuning, or
EasyFFT.
Check the servomotor
speed waveform.
Check the operation procedure of
corresponding function and take a
corrective action.
A.710 - High Load
A.720 - Overload
A.720 - Low Load
Incorrect wiring or contact
fault of servomotor and
encoder.
Check the wiring.
Confirm that the servomotor and
encoder are correctly wired.
Operation beyond the
overload protection
characteristics.
Check the servomotor
overload
characteristics and
executed run
command.
Reconsider the load conditions and
operating conditions. Or, increase
the servomotor capacity.
Excessive load was applied
during operation because
the servomotor was not
driven due to mechanical
problems.
Check the executed
operation reference
and servomotor speed.
Remove the mechanical problems.
A SERVOPACK fault
--
The SERVOPACK may be faulty.