YASKAWA E-V Series User Manual page 215

Alarm:
Alarm Name
A.400: The external regenerative resis-
tance is too high for the actual
Overvoltage
operation conditions.
(Detected when the
SERVOPACK's main
The mass exceeded the allowable
circuit DC voltage is one
value.
of the values below.
100 and 200 VAC SER-
VOPACKs: 410 VDC or
more
400 VAC SERVO-
PACKs: 820 VDC or
A SERVOPACK fault occurred.
more)
(Detected when the
power to the main circuit
is turned ON)
(cont'd)
For 200 VAC SERVOPACKs:
A.410:
The power supply is 120 V or
Undervoltage
less.
(Detected when the
For 400 VAC SERVOPACKs:
SERVOPACK's main
The power supply is 240 V or
circuit DC voltage is one
less.
of the values below.
The power supply voltage
100 VAC SERVO-
dropped during operation.
PACKs: 146 VDC or
less
200 VAC SERVO-
Occurrence of instantaneous
PACKs: 170 VDC or
power interruption.
less
400 VAC SERVO-
PACKs: 340 VDC or The SERVOPACK fuse is blown
less.) out.
(Detected when the
power to the main circuit
A SERVOPACK fault occurred.
is turned ON.)
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.
Cause Investigative Actions
Check the operation conditions and
the regenerative resistance.
Confirm that the mass is within the
allowable range.
−
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.
8.1 Troubleshooting
Corrective Actions
Select a regenerative resistance
value appropriate for the operation
conditions and load.
Increase the deceleration time, or
reduce the load.
Turn the control power OFF and
then ON again while the main cir-
cuit power supply is OFF. If the
alarm still occurs, the SERVO-
PACK may be faulty. Repair or
replace the SERVOPACK.
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.
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