12.3 Warning Displays
12.3.2 Troubleshooting Warnings
12-47
A.910:
Overload (warning
before an A.710 or
A.720 alarm occurs)
The wiring is not
correct or there is
a faulty contact in
the motor or
encoder wiring.
Check the wiring.
Make sure that the Servo-
motor and encoder are cor-
rectly wired.
–
Operation was
performed that
exceeded the
overload protec-
tion characteris-
tics.
Check the motor over-
load characteristics and
Run command.
Reconsider the load and
operating conditions. Or,
increase the motor capacity.
–
An excessive load
was applied
during operation
because the Ser-
vomotor was not
driven because of
mechanical prob-
lems.
Check the operation
reference and motor
speed.
Remove the mechanical
problem.
–
A failure occurred
in the SERVO-
PACK.
–
The SERVOPACK may be
faulty. Replace the SERVO-
PACK.
–
A.911:
Vibration
Abnormal vibra-
tion was detected
during motor
operation.
Check for abnormal
motor noise, and check
the speed and torque
waveforms during oper-
ation.
Reduce the motor speed.
Or, reduce the servo gain
with custom tuning.
page 8-42
The setting of
Pn103 (Moment of
Inertia Ratio) is
greater than the
actual moment of
inertia or was
greatly changed.
Check the moment of
inertia ratio or mass
ratio.
Set Pn103 (Moment of Iner-
tia Ratio) to an appropriate
value.
–
A.912:
Internal Tempera-
ture Warning 1
(Control Board Tem-
perature Error)
The surrounding
temperature is too
high.
Check the surrounding
temperature using a
thermostat. Or, check
the operating status
with the SERVOPACK
installation environ-
ment monitor.
Decrease the surrounding
temperature by improving
the SERVOPACK installa-
tion conditions.
–
An overload alarm
was reset by turn-
ing OFF the power
supply too many
times.
Check the alarm display
to see if there is an
overload alarm.
Change the method for
resetting the alarm.
–
There was an
excessive load or
operation was
performed that
exceeded the
regenerative pro-
cessing capacity.
Use the accumulated
load ratio to check the
load during operation,
and use the regenera-
tive load ratio to check
the regenerative pro-
cessing capacity.
Reconsider the load and
operating conditions.
–
The SERVOPACK
installation orien-
tation is not cor-
rect or there is
insufficient space
around the SER-
VOPACK.
Check the SERVO-
PACK installation con-
ditions.
Install the SERVOPACK
according to specifications.
page 3-3,
page 3-5
A failure occurred
in the SERVO-
PACK.
–
The SERVOPACK may be
faulty. Replace the SERVO-
PACK.
–
Continued from previous page.
Warning Number:
Warning Name
Possible Cause Confirmation Correction Reference
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