YASKAWA Σ-V Series User Manual page 262

Alarm:
Alarm Name
Noise interference occurred on
the input/output signal line from
the linear scale.
Excessive vibration and shocks
were applied to the linear scale.
A.C92:
Encoder
Communications
A linear scale fault occurred.
Timer Error
A SERVOPACK fault occurred.
A linear scale fault occurred.
A.CA0:
Encoder Parameter
Error
A SERVOPACK fault occurred.
The linear scale wiring and con-
tact are incorrect.
Noise interference occurred due
to incorrect specifications of the
linear scale connection cables.
Noise interference occurred
because the wiring distance of the
linear scale connection cables is
too long.
The FG potential varies because
of influence from machines, such
A.Cb0:
as welder, on the linear servomo-
Encoder Echoback
tor side.
Error
Excessive vibration and shocks
were applied to the linear scale.
A linear scale fault occurred.
A SERVOPACK fault occurred.
Cause Investigative Actions
−
Check the operating environment.
−
−
−
−
Check the linear scale wiring.
−
−
Check the cables and connectors for
linear scale.
Check the operating environment.
−
−
8.1 Troubleshooting
Corrective Actions
Take countermeasures against
noise.
Reduce the machine vibration or
correctly install the linear servomo-
tor.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the linear servomotor may
be faulty. Replace the linear servo-
motor.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the linear servomotor may
be faulty. Replace the linear servo-
motor.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
Correct the linear scale wiring.
Use tinned annealed copper twisted-
pair or shielded twisted-pair cable
2
with a core of at least 0.12 mm
The wiring distance must be 20 m
max.
Make the grounding for the
machine separately from linear
scale side FG.
Reduce the machine vibration or
correctly install the linear servomo-
tor.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the linear servomotor may
be faulty. Replace the linear servo-
motor.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
.
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