YASKAWA SGD7S Product Manual page 484

Alarm Number:
Possible Cause
Alarm Name
The /S-ON (Servo ON)
signal was input from
A.0b0:
the host controller
after a utility function
Invalid Servo ON
that turns ON the Ser-
Command Alarm
vomotor was exe-
cuted.
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.
A.100:
The regenerative
resistor is not wired
Overcurrent
correctly or there is
Detected
faulty contact.
(An overcurrent
flowed through
the power tran-
The dynamic brake
sistor or the heat
(DB, emergency stop
sink overheated.)
executed from the
SERVOPACK) was
frequently activated,
or a DB overload
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.
Confirmation
Turn the power supply to
the SERVOPACK OFF and
–
ON again. Or, execute a
software reset.
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
faulty. Replace the
SERVOPACK, or
SERVOPACK.
between the ground
and terminals 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.
12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
page 6-95
page 4-25
page 4-21
–
*3
–
Continued on next page.
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