YASKAWA SGD7S series Product Manual page 172

Alarm Number:
Possible Cause
Alarm Name
The wiring is not cor-
rect or there is a faulty
contact in the motor
or encoder wiring.
Operation was per-
formed that exceeded
the overload protec-
tion characteristics.
An excessive load
was applied during
operation because the
A.710:
Servomotor was not
Instantaneous
driven due to
Overload
mechanical problems.
A.720:
Continuous
There is an error in the
Overload
setting of Pn282 (Lin-
ear Encoder Scale
Pitch).
There is an error in the
setting of Pn080 =
n.X (Motor
Phase Sequence
Selection).
A failure occurred in
the SERVOPACK.
The Servomotor was
rotated by an external
force.
A.730 and A.731:
When the Servomo-
Dynamic Brake
tor was stopped with
Overload
the dynamic brake,
(An excessive
the rotational or linear
power consump-
kinetic energy
tion by the
exceeded the capac-
dynamic brake
ity of the dynamic
was detected.)
brake resistor.
A failure occurred in
the SERVOPACK.
The allowable fre-
A.740:
quency of the inrush
Inrush Current
current limiting resis-
Limiting Resistor
tor was exceeded
Overload
when the main circuit
(The main circuit
power supply was
power supply
turned ON and OFF.
was frequently
turned ON and
A failure occurred in
OFF.)
the SERVOPACK.
Confirmation
Make sure that the Servo-
Check the wiring. motor and encoder are
correctly wired.
Reconsider the load and
Check the motor over-
operating conditions. Or,
load characteristics and
increase the motor
Run command.
capacity.
Check the operation
Correct the mechanical
reference and motor
problem.
speed.
Check the setting of Correct the setting of
Pn282. Pn282.
Check the setting of Set Pn080 = n.X to
Pn080 = n.X. an appropriate value.
The SERVOPACK may be
– faulty. Replace the SER-
VOPACK.
Implement measures to
Check the operation ensure that the motor will
status. not be rotated by an
external force.
Reconsider the following:
• Reduce the Servomotor
Check the power con- command speed.
• Decrease the moment
sumed by the DB resis-
tor to see how of inertia ratio or mass
frequently the DB is ratio.
• Reduce the frequency of
being used.
stopping with the
dynamic brake.
The SERVOPACK may be
– faulty. Replace the SER-
VOPACK.
Reduce the frequency of
turning the main circuit
–
power supply ON and
OFF.
The SERVOPACK may be
– faulty. Replace the SER-
VOPACK.
9.1 Alarm Displays
9.1.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
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