Yaskawa SGDS Sigma III Servo Amplifier User Manual
Page 302
10.1 Troubleshooting
10-13
A.810
Encoder
Backup Error
Occurred when the
control power
supply was turned
ON.
(Setting:
Pn002.2=1)
A SERVOPACK board fault occurred when an
absolute encoder is used with the setting for
incremental encoder.
Replace the SERVOPACK.
Occurred when the
control power
supply was turned
ON using an
absolute encoder.
(Setting:
Pn002.2=0)
Alarm occurred when the power to the absolute
encoder was initially turned ON.
Set up the encoder.
The encoder cable had been disconnected once.
First confirm the connection and set up the
encoder.
The power from both the PG power supply (+5 V)
and the battery power supply from the
SERVOPACK is not being supplied.
Replace the battery or take similar measures to
supply power to the encoder, and set up the
encoder.
An absolute encoder fault occurred.
If the alarm cannot be a reset by setting up the
encoder again.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
A.820
Encoder
Checksum
Error
Occurred when the
control power
supply was turned
ON or during
operation
A fault occurred in the encoder and was detected by
encoder self-diagnosis.
Set up the encoder. If this alarm occurs
frequently, replace the servomotor.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
Occurred when
Sensor ON
(SENS_ON)
command was sent.
A fault occurred in the encoder and was detected by
encoder self-diagnosis.
Set up the encoder. If this alarm occurs
frequently, replace the servomotor.
A.830
Absolute
Encoder
Battery Error
When the control
power supply was
turned ON.
(Setting:
Pn002.2=1)
When the absolute encoder was used as an
incremental, a SERVOPACK board fault occurred.
Replace the SERVOPACK.
When the control
power supply was
turned ON using an
absolute encoder.
(Setting:
Pn002.2=0)
The battery connection is incorrect.
Reconnect the battery.
The battery voltage is lower than the specified value
2.7 V.
Replace the battery, and then turn ON the power
to the encoder.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
A.840
Encoder Data
Error
Occurred when the
control power
supply was turned
ON.
A malfunction occurred in the encoder.
Turn the encoder power supply OFF and then ON
again. If this alarm occurs frequently, replace the
servomotor.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
Occurred during
operation.
A malfunction occurred in the encoder.
Correct the wiring around the encoder by
separating the encoder cable from the power line,
or by checking the grounding and other wiring.)
An encoder fault occurred.
If this alarm occurs frequently, replace the
servomotor.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
A.850
Encoder
Overspeed
Occurred when the
control power
supply was turned
ON.
When the encoder power supply turns ON and the
SEN signal is ON when using an absolute encoder,
the servomotor runs at 200 RPM or more.
Turn ON the encoder power supply when the
servomotor runs at a speed less than 200 RPM.
An encoder fault occurred.
Replace the servomotor.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
Occurred during
operation.
An encoder fault occurred.
Replace the servomotor.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
Table 10.3 Alarm Display and Troubleshooting (Cont’d)
Alarm
Display
Alarm Name
Situation at Alarm
Occurrence
Cause
Corrective Actions