YASKAWA Sigma-7 SGD7S Series - Page 643

Warning
Code
Warning Name Possible Cause Confirmation Correction Reference
The SERVOPACK
installation orientation
is not correct or there
is insufficient space
around the SERVO-
PACK.
Check the SERVO-
PACK installation
conditions.
Install the SERVO-
PACK according to
specifications.
Ä Chap. 4.3
‘Mounting Types
and Orientation’
page 75,
Ä Chap. 4.5
‘Mounting
Interval’
page 79
A failure occurred in
the SERVOPACK.
– The SERVOPACK
may be faulty.
Replace the SERVO-
PACK.
–
A.920
(1920h)
Regenerative
Overload
(warning before
an A.320 alarm
occurs)
The power supply
voltage exceeded the
specified range.
Measure the power
supply voltage.
Set the power supply
voltage within the
specified range.
–
There is insufficient
external regenerative
resistance, regenera-
tive resistor capacity,
or SERVOPACK
capacity, or there has
been a continuous
regeneration state.
Check the operating
conditions or the
capacity using the
SigmaJunmaSize+
Capacity Selection
Software or another
means.
Change the regener-
ative resistance
value, regenerative
resistance capacity,
or SERVOPACK
capacity. Reconsider
the operating condi-
tions using the
Sigma- JunmaSize+
Capacity Selection
Software or other
means.
–
There was a contin-
uous regeneration
state because a nega-
tive load was continu-
ously applied.
Check the load
applied to the Servo-
motor during opera-
tion.
Reconsider the
system including the
servo, machine, and
operating conditions.
–
A.921
(1921h)
Dynamic Brake
Overload
(warning before
an A.731 alarm
occurs)
The Servomotor was
rotated by an external
force.
Check the operation
status.
Implement measures
to ensure that the
motor will not be
rotated by an
external force.
–
When the Servomotor
was stopped with the
dynamic brake, the
rotational or linear
kinetic energy
exceeded the capacity
of the dynamic brake
resistor.
Check the power
consumed by the DB
resistor to see how
frequently the DB is
being used.
Reconsider the fol-
lowing:
n Reduce the Ser-
vomotor com-
mand speed.
n Decrease the
moment of inertia
or mass.
n Reduce the fre-
quency of stop-
ping with the
dynamic brake.
–
A failure occurred in
the SERVOPACK.
– The SERVOPACK
may be faulty.
Replace the SERVO-
PACK.
–
Sigma-7 Series SERVOPACKs
Maintenance
Warning Displays > Troubleshooting Warnings
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