YASKAWA E-V Series User Manual page 304

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
240 V or less.
A.410:
The power supply voltage
Undervoltage
dropped during operation.
(Detected in the SER-
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
overspeed detection level was
A.510:
input.
Overspeed
(The servomotor speed
The motor speed overshoot
exceeds the maximum.)
occurred.
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 speed.
A.520:
Vibration Alarm
The mass ratio (Pn103) value is
greater than the actual value or is
greatly changed.
The servomotor vibrated consid-
A.521:
erably while performing tuning-
Autotuning Alarm
less function (factory setting).
(Vibration was detected
while performing tun-
The servomotor vibrated consid-
ing-less function.)
erably during advanced autotun-
ing.
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 force waveform during opera-
tion.
Check the mass.
Check the servomotor speed wave-
form.
Check the servomotor speed wave-
form.
9.1 Troubleshooting
Corrective Actions
Set the power supply voltage within
the specified range.
Increase the power supply capacity.
Set the power supply voltage within
the specified range. 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.
Repair or replace the SERVO-
PACK.
Replace the SERVOPACK.
Confirm that the servomotor is cor-
rectly wired.
Reduce the reference value or adjust
the gain.
Reduce the reference input gain,
adjust the servo gain, or reconsider
the operation conditions.
The SERVOPACK may be faulty.
Repair or replace the SERVO-
PACK.
Decrease the setting of the encoder
output pulse (Pn281).
Decrease the servomotor speed.
Reduce the servomotor speed or
reduce the speed loop gain (Pn100).
Set the mass ratio (Pn103) to an
appropriate value.
Reduce the load so that the mass
ratio falls within the allowable
value, or reduce the load level or the
gain level using the tuning-less
function (Fn200).
Execute advanced autotuning.
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