Yaskawa Sigma II Series DC Power Input SGMAJ - Manual (Page 290)

10.1 Troubleshooting
10-9
10
A.84 Encoder Data
Error
(Detected on the
encoder side.) Occurred when the
control power sup-
ply was turned ON. A malfunction occurred in the encoder. Turn the encoder power supply OFF and then ON
again. If this alarm occurs frequently, replace the
servomotor.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred during
normal operation. A malfunction occurred in the encoder due to exter-
nal noise. Correct the wiring around the encoder by separat-
ing the encoder cable from the power line, or by
checking the grounding and other wiring.)
An encoder fault occurred. If this alarm occurs frequently, replace the servo-
motor.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
A.85 Encoder Over-
speed
(Detected when
the encoder
power supply
was turned ON.)
(Detected on the
encoder side.) Occurred when the
control power sup-
ply was turned ON. When the encoder power supply turns ON and the
SEN signal is ON when using an absolute encoder,
the servomotor runs at 200 min
-1 or more.
Turn ON the encoder power supply when the ser-
vomotor runs at a speed less than 200 min
-1 .
An encoder fault occurred. Replace the servomotor.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred during
normal operation. An encoder fault occurred. Replace the servomotor.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
A.86 Encoder
Overheated
(Only when an
absolute encoder
is connected.)
(Detected on the
encoder side.) Occurred when the
control power sup-
ply was turned ON. An encoder fault occurred. Replace the servomotor.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred during
normal operation. The ambient temperature around the servomotor is
too high. The ambient temperature must be 40 °C or less.
The servomotor load is greater than the rated load. The servomotor load must be within the specified
range.
An encoder fault occurred. Replace the servomotor.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
A.b1 Reference
Speed Input
Read Error
(Detected when
the Servo is ON.) Occurred when the
control power sup-
ply was turned ON. A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred during
normal operation. A malfunction occurred in reading section of the
speed reference input. Clear and reset the alarm and restart the operation.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
A.b2 Reference
Torque Input
Read Error
(Detected when
the servo is ON.) Occurred when the
control power sup-
ply was turned ON. A SERVOPACK board fault occurred. Replace the SERVOPACK.
A malfunction occurred in the reading section of the
torque reference input. Clear and reset the alarm and restart the operation.
Occurred during
normal operation. A SERVOPACK board fault occurred. Replace the SERVOPACK.
A.bF System Alarm
(Program error)
• Software oper-
ation time
exceeded
• Stack over-
flow
• Micro pro-
gram error
Occurred when the
control power sup-
ply was turned ON. A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred during
normal operation. A program is incorrect. Replace the SERVOPACK. (Contact your
Yaskawa representative.)
A SERVOPACK board fault occurred. Replace the SERVOPACK.
A.C1 Servo Overrun
Detected
(Detected when
the servo is ON.) Occurred when the
control power sup-
ply was turned ON. A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred when the
servo was ON or a
reference was input. The order of phase U, V, and W in the servomotor
wiring is incorrect. Correct the servomotor wiring.
An encoder fault occurred. Replace the servomotor.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Table 10.3 Alarm Display and Troubleshooting (cont’d)
Alarm
Display
Alarm Name
Situation at Alarm
Occurrence
Cause Corrective Actions