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Factory Automation

FAQ

Factory Automation

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  • No : 22517
  • Release Date : 2018/09/03 17:28
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When the message "An unusable COM port was specified" is displayed

A universal model QCPU is connected with a USB cable, but the message "An unusable COM port was specified" is displayed and communication cannot be established. What is the solution?
Category : 

Answer

RS-232 is selected as PC side I/F in Transfer Setup of GX Developer or GX Works2.
Change the setting in PC side I/F to USB.
Product Name
Engineering Software
Series
Software Package (GPP function)

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