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5.3 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.860:
Encoder Over-
heated
(Detected when a
Rotary Servomo-
tor, Absolute Lin-
ear Encoder, or
Direct Drive Ser-
vomotor is con-
nected. However,
this alarm is not
detected for
SGMCS
Servomotors with
Incremental
Encoders.)
(Detected at the
encoder.)
A.861:
Motor Over-
heated
A.890:
Encoder Scale
Error
A.891:
Encoder Module
Error
A.8A0:
External Encoder
Error
5-22
Possible Cause
The surrounding air
Measure the surrounding
temperature around
air temperature around
the Servomotor is too
the Servomotor.
high.
The Servomotor load
Use the accumulated load
is greater than the
ratio to check the load.
rated load.
A failure occurred in
–
the encoder.
A failure occurred in
–
the SERVOPACK.
The surrounding tem-
Measure the surrounding
perature around the
temperature around the
Servomotor is too
Servomotor.
high.
Check the load with the
The motor load is
accumulated load ratio on
greater than the rated
the Motion Monitor Tab
load.
Page on the SigmaWin+.
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 origin,
the absolute linear
use the fully-closed feed-
encoder failed
back pulse counter to
because the motor
confirm that the motor is
moved.
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°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 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.
Refer-
Correction
ence
–
*1
–
–
–
*1
–
–
–
–
*1
–
Continued on next page.
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Table of Contents
Troubleshooting
