YASKAWA E-V Series User Manual page 264

Alarm Number:
Alarm Name
(Alarm Description)
Alarm occurred when the power
to the absolute encoder was ini-
tially turned ON.
The encoder cable disconnected,
and connected again.
A.810:
The power from both the control
Encoder Backup Error
power supply (+5 V) from the
(Only when an absolute
SERVOPACK and the battery
encoder is connected.)
power supply is not being sup-
(Detected on the encoder
plied.
side.)
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 malfunctioned.
A.840:
Encoder Data Error
(Detected on the encoder
side.)
Malfunction of encoder because
of noise interference, etc.
The servomotor speed is higher
than 200 min
power supply was turned ON.
A.850:
Encoder Overspeed
(Detected when the con-
An encoder fault occurred.
trol power supply was
turned ON.)
(Detected on the encoder
side.)
A SERVOPACK fault occurred.
Cause Investigative Actions
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 motor rotating speed
-1
(Un000) to confirm the servomotor
when the control
speed when the power is turned ON.
−
−
8.1 Alarm Displays
(cont'd)
Corrective 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.
• Absolute encoder
Set up the encoder again using
Fn008. If the alarm still occurs,
the servomotor may be faulty.
Replace the servomotor.
• One-turn absolute encoder or
incremental encoder
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.
Restart the SERVOPACK. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
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
-1
value less than 200 min , and turn
ON the control power supply.
Restart the SERVOPACK. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
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