YASKAWA SGD7S series Product Manual page 492

12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.100:
Overcurrent
Detected
(An overcurrent
flowed through
the power tran-
sistor or the heat
sink overheated.)
12-16
Possible Cause
Check the power con-
The dynamic brake sumed by the DB resis-
(DB, emergency stop tor to see how
executed from the frequently the DB is
SERVOPACK) was being used. Or, check
frequently activated, the alarm display to see
or a DB overload if a DB overload alarm
alarm occurred. (A.730 or A.731) has
occurred.
Check the regenerative
load ratio in the Sig-
The regenerative pro- maWin+ Motion Monitor
cessing capacity was Tab Page to see how
exceeded. frequently the regenera-
tive resistor is being
used.
Check the regenerative
load ratio in the Sig-
The SERVOPACK maWin+ Motion Monitor
regenerative resis- Tab Page to see how
tance is too small. frequently the regenera-
tive resistor is being
used.
A heavy load was
Check to see if the
applied while the Ser-
operating conditions
vomotor was stopped
exceed Servo Drive
or running at a low
specifications.
speed.
Improve the noise envi-
ronment, e.g. by
A malfunction was improving the wiring or
caused by noise. installation conditions,
and check to see if the
alarm still occurs.
A failure occurred in
–
the SERVOPACK.
Confirmation
Change the SERVOPACK
model, operating meth-
ods, or the mechanisms
so that the dynamic brake
does not need to be used
so frequently.
Recheck the operating
conditions and load.
Change the regenerative
resistance to a value
larger than the SERVO-
PACK minimum allowable
resistance.
Reduce the load applied
to the Servomotor. Or,
increase the operating
speed.
Implement countermea-
sures against noise, such
as correct wiring of the
FG. Use an FG wire size
equivalent to the SERVO-
PACK's main circuit wire
size.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
Continued from previous page.
Correction Reference
–
*3
–
–
–
Continued on next page.