YASKAWA SGDS Sigma III Series User Manual page 306

Alarm Situation at Alarm
Alarm Name
Display
A.bF0
System Alarm Occurred when the
control power
0
supply was turned
A.bF1
System Alarm
ON.
1
A.bF2
System Alarm
2
A.bF3 System Alarm
3
A.bF4
System Alarm
4
A.C10
Servo Overrun Occurred when the
control power
Detected
supply was turned
ON.
Occurred when the
servo was ON or a
reference was input.
A.C80
Absolute Occurred when the
control power
Encoder Clear
supply was turned
Error and Multi-
ON.
turn Limit
Setting Error Occurred when an
encoder alarm was
cleared and reset.
A.C90
Encoder
Occurred when the
Communicatio control power
supply was turned
ns Error
ON or during
operation.
A.C91
Encoder
Communicatio
ns Position
Data Error
A.C92
Encoder
Communicatio
ns Timer Error
A.CA0
Encoder Occurred when the
control power
Parameter
supply was turned
Error
ON.
Table 10.3 Alarm Display and Troubleshooting (Cont'd)
Occurrence
A SERVOPACK board fault occurred.
A SERVOPACK board fault occurred.
A SERVOPACK board fault occurred.
The order of phase-U, -V, and -W in the servomotor
wiring is incorrect.
An encoder fault occurred.
A SERVOPACK fault occurred.
An encoder fault occurred.
A SERVOPACK board fault occurred.
An encoder fault occurred.
A SERVOPACK board fault occurred.
The encoder wiring and the contact are incorrect.
Noise interference occurred due to incorrect encoder
cable specifications.
Noise interference occurred because the wiring
distance for the encoder cable is too long.
The noise interference occurred on the signal line
because the encoder cable is bent and the sheath is
damaged.
The encoder cable is bundled with a high-current
line or near a high-current line.
The FG varies because of the influence from
machines on the servomotor side, such as welder.
Noise interference occurred on the signal line from
the encoder.
Excessive vibration and shocks were applied to the
encoder.
An encoder fault occurred.
A SERVOPACK board fault occurred.
An encoder fault occurred.
A SERVOPACK board fault occurred.
Cause
Replace the SERVOPACK.
Replace the SERVOPACK.
Correct the servomotor wiring.
Replace the servomotor.
Replace the SERVOPACK.
Replace the servomotor.
Replace the SERVOPACK.
Replace the servomotor.
Replace the SERVOPACK.
Correct the encoder wiring.
Use tinned annealed copper twisted-pair or
twisted-pair shielded wire with a core of at least
0.12 mm
The wiring distance must be 20m (65.6 ft) max.
Correct the encoder cable layout.
Correct the encoder cable layout so that no surge
is applied.
Make the grounding for the machine separately
from PG side FG.
Take a measure against noise for the encoder
wiring.
Reduce the machine vibration or mount the
servomotor securely.
Replace the servomotor.
Replace the SERVOPACK.
Replace the servomotor.
Replace the SERVOPACK.
10.1 Troubleshooting
Corrective Actions
2 2
(0.0002 in ).
10-15