YASKAWA SGMJV User Manual page 316

Alarm Number:
Alarm Name
Noise interference occurred on
the I/O signal line because the
encoder cable is bent and the
sheath is damaged.
A.C91:
The encoder cable is bundled
Encoder
with a high-current line or near a
Communications
high-current line.
Position Data Error
The FG potential varies because
of influence from machines on
the servomotor side, such as the
welder.
Noise interference occurred on
the I/O signal line from the
encoder.
Excessive vibration and shocks
were applied to the encoder.
A.C92:
Encoder
An encoder fault occurred.
Communications
Timer Error
A SERVOPACK fault occurred.
An encoder fault occurred.
A.CA0:
Encoder Parameter
Error
A SERVOPACK fault occurred.
Cause Investigative Actions
Check the encoder cable and con-
nector.
Check the cable layout for encoder
cable.
Check the cable layout for encoder
cable.
−
Check the operating environment.
−
−
−
−
9.1 Alarm Displays
(cont'd)
Corrective Actions
Confirm that there is no problem
with the cable layout.
Confirm that there is no surge volt-
age on the cable.
Properly ground the machines to
separate from the encoder FG.
Take countermeasures against noise
for the encoder wiring.
Reduce the machine vibration or
correctly install the servomotor.
Turn the power supply to the SER-
VOPACK OFF and ON again. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
Turn the power supply to the SER-
VOPACK OFF and ON again. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Turn the power supply to the SER-
VOPACK OFF and ON again. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
Turn the power supply to the SER-
VOPACK OFF and ON again. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
9
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