YASKAWA SGD7S Product Manual page 441

Alarm Number:
Possible Cause
Alarm Name
The Main Circuit
Cable is not wired
correctly or there is
faulty contact.
There is a short-circuit
or ground fault in a
Main Circuit Cable.
There is a short-circuit
or ground fault inside
the Servomotor.
There is a short-circuit
or ground fault inside
the SERVOPACK.
The regenerative
resistor is not wired
correctly or there is
faulty contact.
A.100:
Overcurrent
The dynamic brake
Detected
(DB, emergency stop
(An overcurrent
executed from the
flowed through
SERVOPACK) was
the power trans-
frequently activated,
former or the heat
or a DB overload
sink overheated.)
alarm occurred.
The regenerative pro-
cessing capacity was
exceeded.
The SERVOPACK
regenerative resis-
tance is too small.
A heavy load was
applied while the Ser-
vomotor was stopped
or running at a low
speed.
A malfunction was
caused by noise.
Confirmation
Check the wiring. Correct the wiring.
Check for short-circuits
across Servomotor
The cable may be short-
phases U, V, and W, or
circuited. Replace the
between the ground
cable.
and Servomotor phases
U, V, and W.
Check for short-circuits
across Servomotor
The Servomotor may be
phases U, V, and W, or
faulty. Replace the Servo-
between the ground
motor.
and Servomotor phases
U, V, or W.
Check for short-circuits
across the Servomotor
connection terminals U, The SERVOPACK may be
V, and W on the SER- faulty. Replace the SER-
VOPACK, or between VOPACK.
the ground and termi-
nals U, V, or W.
Check the wiring. Correct the wiring.
Check the power con-
sumed by the DB resis-
Change the SERVOPACK
tor to see how
model, operating meth-
frequently the DB is
ods, or the mechanisms
being used. Or, check
so that the dynamic brake
the alarm display to see
does not need to be used
if a DB overload alarm
so frequently.
(A.730 or A.731) has
occurred.
Check the regenerative
load ratio in the Sig-
maWin+ Motion Monitor
Recheck the operating
Tab Page to see how
conditions and load.
frequently the regenera-
tive resistor is being
used.
Check the regenerative
load ratio in the Sig- Change the regenerative
maWin+ Motion Monitor resistance to a value
Tab Page to see how larger than the SERVO-
frequently the regenera- PACK minimum allowable
tive resistor is being resistance.
used.
Check to see if the Reduce the load applied
operating conditions to the Servomotor. Or,
exceed Servo Drive increase the operating
specifications. speed.
Implement countermea-
Improve the noise envi-
sures against noise, such
ronment, e.g. by
as correct wiring of the
improving the wiring or
FG. Use an FG wire size
installation conditions,
equivalent to the SERVO-
and check to see if the
PACK's main circuit wire
alarm still occurs.
size.
14.2 Alarm Displays
14.2.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
page 4-24
page 4-21
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Continued on next page.
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