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
Summary of Contents for SGDJ Series
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