YASKAWA YASNAC XRC - Al-0021 (Communication Error (Servo))

AL-0021 (COMMUNICATION ERROR (SERVO))
An alarm
occurs.
Remove connector CN10 on the
WRCA01 circuit board and re-insert it.
Alarm?
Yes No
Check the connection of the
communications cable.
Continue normal
operation.
When the power is turned ON, an error is found in
communications with the SERVOPACK by self-diagonosis.
The SERVOPACK cannot be connected.
Remove connector CN05 on the
XCP01 circuit board and re-insert it.
Alarm?
Yes No
Continue normal
operation.
Is the LED on the
WRCA01 circuit board lit?
YesNo
Remove connector CN50 on WRCA
circuit board and re-insert it.
Alarm?
Yes No
Remove connector 2CN on the
RCP01AAA unit and re-insert it.
Alarm?
Yes No
Is the LED on the
RCP01AAA unit lit?
YesNo
Remove connector 1CN on the
RCP01AAA unit and re-insert it.
Alarm?
Yes No
Check the fuse for the
RCP01AAA unit.
Blown outNormal
Remove the connector 1CN on the
RCP01AAA unit and re-insert it.
Alarm?
Yes No
Contact your Yaskawa
representative.
Continue normal
operation.
Replace the WRCA01 circuit board.
Alarm?
Yes No
Contact your Yaskawa
representative.
Continue normal operation.
The defective WRCA01 circuit
board caused the alarm.
Remove the terminal connector of
CN10 on the WRCA01 circuit board
and re-insert it.
Alarm?
Yes No
Continue normal
operation.
SERVOPACK
Power
supply unit
WRCA01
RCP01AAA
Continue normal
operation.
Continue normal
operation.
Continue normal
operation.
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