YASKAWA Motoman UP6 - Al1302 (Communication Error (Servo I;O))

AL1302 (COMMUNICATION ERROR (SERVO I/O))
An alarm
occurs.
Remove connector CN20 on the
WRCA01 circuit board and re-insert it.
Alarm?
Yes No
Continue normal
operation.
Remove connector CN21 on the
XIU01 unit and re-insert it.
Alarm?
Yes No
Continue normal operation.
Continue normal operation.
Turn the control power supply OFF
and then ON.
Alarm?
Yes No
Replace the WRCA01 circuit board.
Alarm?
Yes No
Continue normal operation.
The defective WRCA01 circuit
board caused the alarm.
Replace the XIU01 unit.
Alarm?
Yes No
Continue normal operation.
The defective XIU01 unit
caused the alarm.
Replace the cable between CN21 on
the XIU01 unit and CN20 on the
WRCA01 circuit board.
Alarm?
Yes No
Continue normal operation.
The defective cable caused the alarm.
Contact your Yaskawa
representative.
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