Mitsubishi Electric MELSEC Q Series Reference Manual page 569

(2) When a programming tool connected station is faulty
Control station Normal station
No.1 No.2
Normal Normal station
station
No.3
No.4
External power supply
Select the own station.
An error has occurred in the station No.4.
Click the error details button.
The Error Factor field indicates that no external power is supplied.
Take corrective actions according to the troubleshooting.
CHAPTER 10 TROUBLESHOOTING
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