YASKAWA E-S Series Product Manual page 234

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