YASKAWA SGMJV User Manual page 343

Alarm:
Alarm Name
• For 100 VAC SERVOPACKs:
The power supply voltage is 49
V or less.
• For 200 VAC SERVOPACKs:
The power supply voltage is
120 V or less.
• For 400 VAC SERVOPACKs:
The power supply voltage is
A.410:
240 V or less.
Undervoltage
The power supply voltage
(Detected in the SER-
dropped during operation.
VOPACK main circuit
power supply section.)
Occurrence of instantaneous
power interruption.
The SERVOPACK fuse is blown
out.
A SERVOPACK fault occurred.
A.450:
A SERVOPACK fault occurred.
Main-Circuit
Capacitor Overvoltage
The order of phases U, V, and W
in the servomotor wiring is incor-
rect.
A reference value exceeding the
A.510:
overspeed detection level was
Overspeed
input.
(The servomotor speed
exceeds the maximum.)
The motor speed exceeded the
maximum.
A SERVOPACK fault occurred.
The encoder output pulse output
frequency exceeded the limit.
A.511:
The encoder output pulse output
Overspeed of Encoder
frequency exceeded the limit
Output Pulse Rate
because the servomotor speed
was too high.
Abnormal vibration was detected
at the servomotor rotation speed.
A.520:
Vibration Alarm
The moment of inertia ratio
(Pn103) value is greater than the
actual value or is greatly
changed.
A.521:
The servomotor vibrated consid-
Autotuning Alarm
erably while performing tuning-
(Vibration was detected
less function (factory setting).
while executing the
advanced autotuning,
The servomotor vibrated consid-
one-parameter tuning,
erably during advanced autotun-
EasyFFT, or tuning-less
ing, one-parameter tuning, or
function.)
EasyFFT.
Cause Investigative Actions
Measure the power supply voltage.
Measure the power supply voltage.
Measure the power supply voltage.
−
−
−
Check the servomotor wiring.
Check the input value.
Check the servomotor speed wave-
form.
−
Check the encoder output pulse out-
put setting.
Check the encoder output pulse out-
put setting and servomotor speed.
Check for abnormal noise from the
servomotor, and check the speed
and torque waveform during opera-
tion.
Check the moment of inertia ratio.
Check the servomotor speed wave-
form.
Check the servomotor speed wave-
form.
10.1 Troubleshooting
Corrective Actions
Set the power supply voltage within
the specified range.
Increase the power supply capacity.
When the instantaneous power cut
hold time Pn509 is set, decrease the
setting.
Repair or replace the SERVO-
PACK, connect an AC/DC reactor,
and run the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Replace the SERVOPACK.
Confirm that the servomotor is cor-
rectly wired.
Reduce the reference value or adjust
the gain.
Reduce the speed reference input
gain, adjust the servo gain, or recon-
sider the operation conditions.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Decrease the setting of the encoder
output pulse (Pn212).
Decrease the servomotor speed.
Reduce the servomotor speed or
reduce the speed loop gain (Pn100).
Set the moment of inertia ratio
(Pn103) to an appropriate value.
Reduce the load so that the moment
of inertia ratio falls within the
allowable value, or raise the tuning
level or reduce the gain level using
the tuning-less function (Fn200).
Check the operation procedure of
corresponding function and take a
corrective action.
10
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