YASKAWA SGMJV User Manual page 345

Alarm:
Alarm Name
Alarm occurred when the power
to the absolute encoder was ini-
tially turned ON.
The encoder cable disconnected,
and connected again.
A.810:
Encoder Backup Error
The power from both the control
power supply (+5 V) and the bat-
(Detected on the encoder
tery power supply from the SER-
side)
VOPACK is not being supplied.
(Only when an absolute
encoder is connected.)
An absolute encoder fault
occurred.
A SERVOPACK fault occurred.
A.820:
An encoder fault occurred.
Encoder Checksum
Error
(Detected on the encoder
side.)
A SERVOPACK fault occurred.
The battery connection is incor-
A.830:
rect.
Absolute Encoder
Battery Error The battery voltage is lower than
the specified value 2.7 V.
(The absolute encoder
battery voltage is lower
A SERVOPACK fault occurred.
than the specified value.)
An encoder fault occurred.
A.840:
Encoder Data Error
(Detected on the encoder
side.)
Malfunction of encoder because
of noise interference, etc.
The servomotor was running at
200 min
control power supply was turned
A.850:
ON.
Encoder Overspeed
(Detected when the con-
trol power supply was
An encoder fault occurred.
turned OFF and then ON
again.)
(Detected on the encoder
side.)
A SERVOPACK fault occurred.
The ambient temperature around
the servomotor is too high.
The servomotor load is greater
than the rated load.
A.860:
Encoder Overheated
(Only when an absolute
An encoder fault occurred.
encoder is connected.)
(Detected on the encoder
side.)
A SERVOPACK fault occurred.
Cause
Check to see if the power was
turned ON initially.
Check to see if the power was
turned ON initially.
Check the encoder connector bat-
tery or the connector contact status.
−
−
−
−
Check the battery connection.
Measure the battery voltage.
−
−
−
Check the speed monitor (Un000)
-1
or higher when the
to confirm the servomotor speed
when the power is turned ON.
−
−
Measure the ambient temperature
around the servomotor.
Check the accumulated load ratio
monitor (Un009) to see the load.
−
−
Investigative Actions
Set up the encoder (Fn008).
Confirm the connection and set up
the encoder (Fn008).
Replace the battery or take similar
measures to supply power to the
encoder, and set up the encoder
(Fn008).
If the alarm cannot be reset by set-
ting up the encoder again, replace
the servomotor.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Set up the encoder again using
Fn008. If the alarm still occurs, the
servomotor may be faulty. Replace
the servomotor.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Reconnect the battery.
Replace the battery.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the servomotor may be
faulty. Replace the servomotor.
Correct the wiring around the
encoder by separating the encoder
cable from the servomotor main cir-
cuit cable or by checking the
grounding and other wiring.
Reduce the servomotor speed to a
value less than 200 min
ON the control power supply.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the servomotor may be
faulty. Replace the servomotor.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
The ambient temperature must be
40°C or less.
The servomotor load must be within
the specified range.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the servomotor may be
faulty. Replace the servomotor.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
10.1 Troubleshooting
Corrective Actions
-1
, and turn
10-13
10