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9.2 Warning Displays
9-23
9
Trou
blesh
ooting
A.911:
Vibration
Abnormal vibration was
detected at the motor
speed.
Check for abnormal noise from the
servomotor, and check the speed and
force waveforms during operation.
Reduce the motor speed or reduce the
servo gain by using the function such
as one-parameter tuning.
The mass ratio (Pn103)
value is greater than the
actual value or is greatly
changed.
Check the mass ratio.
Set the mass ratio (Pn103) to an
appropriate value.
A.920:
Regenerative
Overload
(Warning before
the alarm A.320
occurs)
The power supply volt-
age exceeds the speci-
fied limit.
Measure the power supply voltage.
Set the power supply voltage within
the specified range.
Insufficient external
regenerative resistance,
regenerative resistor
capacity, or SERVO-
PACK capacity.
Or, regenerative power
has been continuously
flowing back.
Check the operating condition or the
capacity using the capacity selection
Software SigmaJu, etc.
Change the regenerative resistance,
regenerative resistor capacity, or SER-
VOPACK capacity. Reconsider the
operating conditions using the capac-
ity selection software SigmaJunma-
Size+, etc.
Regenerative power
continuously flowed
back because negative
load was continuously
applied.
Check the load to the servomotor dur-
ing operation.
Reconsider the system including servo
drives, machine, and operating condi-
tions.
A.921:
Dynamic Brake
Overload
(Warning before
the alarm A.731
occurs)
The servomotor moves
because of external
force.
Check the operation status.
Take measures to ensure the servomo-
tor will not move because of external
force.
The moving energy at a
DB stop exceeds the DB
resistance capacity.
Check the power consumed by DB
resistance (Un00B) to see how many
times the DB has been used.
Reconsider the following:
• Reduce the motor reference speed.
• Reduce the mass ratio.
• Reduce the number of times of the
DB stop operation.
A SERVOPACK fault
occurred.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.941:
Change of Pa-
rameters Re-
quires Restart
Parameters that require
the restart have been
changed.
Turn OFF the power and ON again.
(cont’d)
Warning Num-
ber: Warning
Name (Warning
Description)
Cause
Investigative Actions
Corrective Actions
Summary of Contents for SGDV SERVOPACK
Page 23: ...www dadehpardazan ir 88594014 15 xxii ...
Page 53: ...www dadehpardazan ir 88594014 15 2 Panel Operator 2 10 ...
Page 203: ...www dadehpardazan ir 88594014 15 5 Operation 5 11 5 Precautions for Safety Functions 5 86 ...
Page 275: ...www dadehpardazan ir 88594014 15 6 Adjustments 6 9 7 Position Integral 6 72 ...