YASKAWA Sigma-7-Series Product Manual page 91

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.
A.100:
Overcurrent
Detected
The regenerative
(An overcurrent
resistor is not wired
flowed through
correctly or there is
the power trans-
faulty contact.
former or the heat
sink overheated.)
The dynamic brake
(DB, emergency stop
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.
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.
5.3 Troubleshooting Alarms
Continued from previous page.
Correction Reference
*1
*1
–
*4
Continued on next page.
5
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