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5.3 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.7Ab:
SERVOPACK
Built-in Fan
Stopped
A.810:
Encoder Backup
Alarm
(Detected at the
encoder, but only
when an abso-
lute encoder is
used.)
A.820:
Encoder Check-
sum Alarm
(Detected at the
encoder.)
A.830:
Encoder Battery
Alarm
(The absolute
encoder battery
voltage was lower
than the speci-
fied level.)
5-20
Possible Cause
The fan inside the
Check for foreign matter
SERVOPACK
inside the SERVOPACK.
stopped.
The power to the
Check to see if the power
absolute encoder was
supply was turned ON for
turned ON for the first
the first time.
time.
The Encoder Cable
Check to see if the power
was disconnected
supply was turned ON for
and then connected
the first time.
again.
Power is not being
supplied both from
the control power
Check the encoder con-
supply (+5 V) from the
nector battery and the
SERVOPACK and
connector status.
from the battery
power supply.
A failure occurred in
–
the absolute encoder.
A failure occurred in
–
the SERVOPACK.
A failure occurred in
–
the encoder.
A failure occurred in
–
the SERVOPACK.
The battery connec-
Check the battery con-
tion is faulty or a bat-
nection.
tery is not connected.
The battery voltage is
Measure the battery volt-
lower than the speci-
age.
fied value (2.7 V).
A failure occurred in
–
the SERVOPACK.
Confirmation
Remove foreign matter
from the SERVOPACK. If
an alarm still occurs, the
SERVOPACK may be
faulty. Replace the SER-
VOPACK.
Set up the encoder.
Check the encoder con-
nection and set up the
encoder.
Replace the battery or
implement similar mea-
sures to supply power to
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.
Correct the battery con-
nection.
Replace the battery.
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
Continued from previous page.
Refer-
Correction
ence
–
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Continued on next page.
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Table of Contents
Troubleshooting
