YASKAWA SGMPS - Page 346

10 Troubleshooting
10.1.2 Troubleshooting of Alarms
10-14
A.8A0
*2
:
External Encoder
Error of Scale
Setting of the zero point position
of absolute external scale failed
because the servomotor rotated.
Before setting the zero point posi-
tion, use the fully-closed feedback
counter monitor (Un00E) to con-
firm that the servomotor is not rotat-
ing.
The servomotor must be stopped
while setting the zero point posi-
tion.
An external encoder fault
occurred.
− Replace the external encoder.
A.8A1
*2
:
External Encoder
Error of Module
An external encoder fault
occurred.
− Replace the external encoder.
A serial converter unit fault
occurred.
− Replace the serial converter unit.
A.8A2
*2
:
External Encoder
Error of Sensor
(Incremental)
An external encoder fault
occurred.
− Replace the external encoder.
A.8A3
*2
:
External Encoder
Error of Position
(Absolute)
An absolute external encoder
fault occurred.
−
The absolute external encoder may
be faulty. Refer to the encoder man-
ufacture’s instruction manual for
corrective actions.
A.8A5
*2
:
External Encoder
Overspeed
The overspeed from the external
encoder occurred.
−
Repair or replace the external
encoder.
A.8A6
*2
:
External Encoder
Overheated
The overheat from the external
encoder occurred.
−
Repair or replace the external
encoder.
A.b10:
Speed Reference A/D
Error
(Detected when the
servo is ON.)
A malfunction occurred in the
speed reference input section.
−
Clear and reset the alarm and restart
the operation.
A SERVOPACK fault occurred. −
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b11:
Speed Reference A/D
Data Error
A malfunction occurred in the
speed reference input section.
−
Clear and reset the alarm and restart
the operation.
A SERVOPACK fault occurred. −
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b20:
Reference Torque
Input Read Error
(Detected when the
servo is ON.)
A malfunction occurred in the
reading section of the torque ref-
erence input.
−
Clear and reset the alarm and restart
the operation.
A SERVOPACK fault occurred. −
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b31:
Current Detection
Error 1
(Phase-U)
The current detection circuit for
phase U is faulty.
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b32:
Current Detection
Error 2
(Phase-V)
The current detection circuit for
phase V is faulty.
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
∗2. The alarm that may occur in a SERVOPACK with option module for fully-closed loop control.
Alarm:
Alarm Name
Cause Investigative Actions Corrective Actions