YASKAWA SGD7S-R70A Product Manual page 159

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
A.710:
operation because the
Instantaneous
Servomotor was not
Overload
driven due to
A.720:
mechanical problems.
Continuous
Overload
There is an error in the
setting of Pn282 (Lin-
ear Encoder Pitch).
There is an error in the
setting of Pn080 =
n.X (Motor
Phase Selection).
A failure occurred in
the SERVOPACK.
The Servomotor was
rotated by an external
force.
A.730 and
A.731: When the Servomo-
tor was stopped with
Dynamic Brake
the dynamic brake,
Overload
the rotational or linear
(An excessive
kinetic energy
power consump-
exceeded the capac-
tion by the
ity of the dynamic
dynamic brake
brake resistor.
was detected.)
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
operation reference.
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.
8.1 Alarm Displays
8.1.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
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