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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?
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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.
Change the setting in PC side I/F to USB.
- Product Name
- Engineering Software
- Series
- Software Package (GPP function)
