YASKAWA SGD7S series Product Manual page 174

Alarm Number:
Possible Cause
Alarm Name
A.7Ab:
The fan inside the
SERVOPACK
SERVOPACK
Built-in Fan
stopped.
Stopped
The power to the
absolute encoder was
turned ON for the first
time.
The Encoder Cable
was disconnected
and then connected
again.
A.810:
Encoder Backup Power is not being
Alarm supplied both from
(Detected at the the control power
encoder, but only supply (+5 V) from the
SERVOPACK and
when an abso-
from the battery
lute encoder is
power supply.
used.)
A failure occurred in
the absolute encoder.
A failure occurred in
the SERVOPACK.
A failure occurred in
A.820:
the encoder.
Encoder Check-
sum Alarm
(Detected at the
encoder.)
A failure occurred in
the SERVOPACK.
The battery connec-
A.830:
tion is faulty or a bat-
Encoder Battery
tery is not connected.
Alarm
The battery voltage is
(The absolute
lower than the speci-
encoder battery
fied value (2.7 V).
voltage was lower
than the speci-
A failure occurred in
fied level.)
the SERVOPACK.
Confirmation
Remove foreign matter
from the SERVOPACK. If
Check for foreign matter an alarm still occurs, the
inside the SERVOPACK. SERVOPACK may be
faulty. Replace the SER-
VOPACK.
Check to see if the
power supply was
Set up the encoder.
turned ON for the first
time.
Check to see if the
Check the encoder con-
power supply was
nection and set up the
turned ON for the first
encoder.
time.
Replace the battery or
Check the encoder implement similar mea-
connector battery and sures to supply power to
the connector status. the encoder, and set up
the encoder.
If the alarm still occurs
after setting up the
–
encoder again, replace
the Servomotor.
The SERVOPACK may be
– faulty. Replace the SER-
VOPACK.
 When Using an Abso-
lute Encoder
Set up the encoder again.
If the alarm still occurs,
the Servomotor may be
faulty. Replace the Servo-
motor.
 When Using a Single-
–
turn Absolute Encoder
or Incremental Encoder
• The Servomotor may be
faulty. Replace the Ser-
vomotor.
• The linear encoder may
be faulty. Replace the
linear encoder.
The SERVOPACK may be
– faulty. Replace the SER-
VOPACK.
Check the battery con- Correct the battery con-
nection. nection.
Measure the battery
Replace the battery.
voltage.
The SERVOPACK may be
– faulty. Replace the SER-
VOPACK.
9.1 Alarm Displays
9.1.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
–
*1
*1
*1
–
–
*1
–
*1
*1
–
Continued on next page.
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