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12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
12-26
A.860:
Encoder Over-
heated (Detected
at the encoder,
but only when an
absolute encoder
is used.)
The surrounding air
temperature around
the Servomotor is too
high.
Measure the surround-
ing air temperature
around the Servomotor.
Reduce the surrounding
air temperature of the
Servomotor to 40
°
C or
less.
–
The Servomotor load
is greater than the
rated load.
Use the accumulated
load ratio to check the
load.
Operate the Servo Drive
so that the motor load
remains within the speci-
fied range.
–
A failure occurred in
the encoder.
–
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.
–
A failure occurred in
the SERVOPACK.
–
Turn the power supply to
the SERVOPACK OFF and
ON again.
If an alarm still occurs, the
SERVOPACK may be
faulty.
Replace the SERVO-
PACK.
–
A.861:
Motor Over-
heated
The surrounding tem-
perature around the
Servomotor is too
high.
Measure the surround-
ing temperature around
the Servomotor.
Reduce the surrounding
air temperature of the
Servomotor to 40
°
or less.
–
The motor load is
greater than the rated
load.
Check the load with the
accumulated load ratio
on the Motion Monitor
Tab Page on the Sig-
maWin+.
Operate the Servo Drive
so that the motor load
remains within the speci-
fied range.
–
A failure occurred in
the Serial Converter
Unit.
–
Turn the power supply to
the SERVOPACK OFF and
ON again.
If an alarm still occurs, the
Serial Converter Unit may
be faulty.
Replace the Serial Con-
verter Unit.
–
A failure occurred in
the SERVOPACK.
–
Turn the power supply to
the SERVOPACK OFF and
ON again.
If an alarm still occurs, the
SERVOPACK may be
faulty.
Replace the SERVO-
PACK.
–
A.890:
Encoder Scale
Error
A failure occurred in
the linear encoder.
–
The linear encoder may
be faulty.
Replace the linear
encoder.
–
A.891:
Encoder Module
Error
A failure occurred in
the linear 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.
–
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause
Confirmation
Correction
Reference
for Correc-
tion