YASKAWA SGD7S series Product Manual page 144

4.2 SERVOPACKs with MECHATROLINK-III Communications References
4.2.3 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.860:
Encoder Over-
heated
(Detected at the
encoder, but only
when an abso-
lute encoder is
used.)
A.861:
Motor Over-
heated
A.890:
Encoder Scale
Error
A.891:
Encoder Module
Error
A.8A0:
External Encoder
Error
4-76
Possible Cause
The surrounding air
Measure the surround-
temperature around
ing air temperature
the Servomotor is too
around the Servomotor.
high.
The Servomotor load Use the accumulated
is greater than the load ratio to check the
rated load. load.
A failure occurred in
–
the encoder.
A failure occurred in
–
the SERVOPACK.
The surrounding tem-
Measure the surround-
perature around the
ing temperature around
Servomotor is too
the Servomotor.
high.
Check the load with the
The motor load is accumulated load ratio
greater than the rated on the Motion Monitor
load. Tab Page on the Sig-
maWin+.
A failure occurred in
the Serial Converter
–
Unit.
A failure occurred in
–
the SERVOPACK.
A failure occurred in
–
the linear encoder.
A failure occurred in
–
the linear encoder.
Setting the origin of Before you set the ori-
the absolute linear gin, use the fully-closed
encoder failed feedback pulse counter
because the motor to confirm that the
moved. motor is not moving.
A failure occurred in
–
the external encoder.
Confirmation
Reduce the surrounding
air temperature of the
Servomotor to 40°C or
less.
Operate the Servo Drive
so that the motor load
remains within the speci-
fied range.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the Servomotor or
absolute linear encoder
may be faulty. Replace the
Servomotor or absolute
linear encoder.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
Reduce the surrounding
air temperature of the
Servomotor to 40° or less.
Operate the Servo Drive
so that the motor load
remains within the speci-
fied range.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the Serial Con-
verter Unit may be faulty.
Replace the Serial Con-
verter Unit.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
The linear encoder may
be faulty. Replace the lin-
ear encoder.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the linear encoder
may be faulty. Replace the
linear encoder.
The motor must be
stopped while setting the
origin position.
Replace the external
encoder.
Continued from previous page.
Correction Reference
–
*1
–
–
–
*1
–
–
–
–
*1
–
Continued on next page.