YASKAWA E-S Series User Manual

10.1 Alarm and Warning Displays
10.1.3 Troubleshooting Alarms
10-8
A.400:
Overvoltage
(Detected in the
main circuit
power supply
section of the
SERVOPACK.)
The power supply volt-
age exceeded the
specified range.
Measure the power sup-
ply voltage.
Set the DC power sup-
ply voltage within the
specified range.
−
The power supply is
not stable or was influ-
enced by a lightning
surge.
Measure the power sup-
ply voltage.
Improve the power sup-
ply conditions, install a
surge absorber, and
then turn the power
supply OFF and ON
again. If an alarm still
occurs, the SERVO-
PACK may be faulty.
Replace the SERVO-
PACK.
−
The voltage for DC
power supply was too
high during accelera-
tion or deceleration.
Check the power supply
voltage and the speed
and torque during opera-
tion.
Set the DC power sup-
ply voltage within the
specified range.
−
The moment of inertia
ratio exceeded the
allowable value.
Check to see if the
moment of inertia ratio is
within the allowable
range.
Increase the decelera-
tion time, or reduce the
load.
−
A failure occurred in
the SERVOPACK.
−
If an alarm still occurs
even when the power
supply voltage is within
product specifications,
the SERVOPACK may
be faulty. Replace the
SERVOPACK.
−
A.510:
Overspeed
(The motor
exceeded the
maximum
speed.)
The order of phases U,
V, and W in the motor
wiring is not correct.
Check the wiring of the
Servomotor.
Make sure that the Ser-
vomotor is correctly
wired.
−
The target speed
exceeded the over-
speed detection level.
Check the target speed.
Reduce the target
speed. Or, adjust the
gain.
−
The motor exceeded
the maximum speed.
Check the waveform of
the motor speed.
Tune the servo gains.
Or, reconsider the oper-
ating conditions.
−
A failure occurred in
the SERVOPACK.
−
The SERVOPACK may
be faulty. Replace the
SERVOPACK.
−
A.6B0:
Emergency
Stop Operation
Failure
The motor did not stop
due to a mechanical
problem after the
emergency stop signal
was input.
Check the waveform of
the motor speed on the
SigmaWin+.
Correct the mechanical
problem.
−
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction
Reference
for
Correction

YASKAWA E-S Series Specifications

General

Brand	YASKAWA
Model	E-S Series
Category	Servo Drives
Language	English