YASKAWA SGDH User Manual page 553

Alarm Situation at Alarm
Alarm Name
Display
A.bF
System Alarm Occurred when the
control power sup-
(Program error)
ply was turned ON.
• Software oper-
ation time Occurred during
exceeded normal operation.
• Stack over-
flow
• Micro pro-
gram error
A.C1
Servo Overrun Occurred when the
Detected control power sup-
ply was turned ON.
(Detected when
the servo is ON.) Occurred when the
servo was ON or a
reference was input.
A.C8 Absolute
Occurred when the
Encoder Clear control power sup-
ply was turned ON.
Error and Multi-
turn Limit Set-
Occurred when an
ting Error
encoder alarm was
cleared and reset.
A.C9 Encoder
Occurred when the
Communica- control power sup-
ply was turned ON
tions Error
or during operation.
A.CA
Encoder Occurred when the
control power sup-
Parameter
ply was turned ON.
Error
Table 10.6 Alarm Display and Troubleshooting (Cont'd)
Occurrence
A SERVOPACK board fault occurred.
A program is incorrect.
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 dis-
tance 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 electrical potential varies because of the
influence from such machines on the servomotor
side as welders.
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. (Contact your
Yaskawa representative.)
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.
Ground the machine separately from PG side FG.
Take a measure against noise for the encoder wir-
ing.
Reduce the machine vibration or mount the servo-
motor securely.
Replace the servomotor.
Replace the SERVOPACK.
Replace the servomotor.
Replace the SERVOPACK.
10-13
10.1 Troubleshooting
Corrective Actions
2 2
(0.0002 in ).
10