YASKAWA SGD7S Product Manual page 468

Alarm Number:
Possible Cause
Alarm Name
The surrounding tem-
perature is too high.
The overheat protec-
tion input signal line is
disconnected or
short-circuited.
An overload alarm
was reset by turning
OFF the power sup-
ply too many times.
A.862:
Operation was per-
Overheat Alarm
formed under an
excessive load.
A failure occurred in
the SERVOPACK.
The temperature
detection circuit in the
Linear Servomotor is
faulty or the sensor
attached to the
machine is faulty.
A.890:
A failure occurred in
Encoder Scale
the linear encoder.
Error
A.891:
A failure occurred in
Encoder Module
the linear encoder.
Error
Setting the origin of
the absolute linear
encoder failed
A.8A0:
because the motor
External Encoder
moved.
Error
A failure occurred in
the external encoder.
A failure occurred in
the external encoder.
A.8A1:
External Encoder
A failure occurred in
Module Error
the Serial Converter
Unit.
A.8A2:
A failure occurred in
External Incre-
the external encoder.
mental Encoder
Sensor Error
A.8A3:
A failure occurred in
External Abso-
the external absolute
lute Encoder
encoder.
Position Error
Confirmation
Lower the surrounding
Check the surrounding temperature by improving
temperature using a the installation conditions
thermostat. of the Linear Servomotor
or the machine.
Check the input voltage
of the overheat protec- Repair the line for the
tion input on the Motion overheat protection input
Monitor Tab Page on signal.
the SigmaWin+.
Check the alarm display
Change the method for
to see if there is an
resetting the alarm.
overload alarm.
Use the accumulated
Reconsider the load and
load ratio to check the
operating conditions.
load during operation.
The SERVOPACK may be
– faulty. Replace the
SERVOPACK.
The temperature detec-
tion circuit in the Linear
Servomotor may be faulty
or the sensor attached to
– the machine may be
faulty. Replace the Linear
Servomotor or repair the
sensor attached to the
machine.
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.
Before you set the ori-
gin, use the fully-closed The motor must be
feedback pulse counter stopped while setting the
to confirm that the origin position.
motor is not moving.
Replace the external
–
encoder.
Replace the external
–
encoder.
Replace the Serial Con-
–
verter Unit.
Replace the external
–
encoder.
The external absolute
encoder may be faulty.
Refer to the encoder
–
manufacturer's instruc-
tion manual for correc-
tions.
14.2 Alarm Displays
14.2.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
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page 12-3
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