Q. [R Product] How to Move the PLC from COM2 to COM1 Port
A.

If the PLC is set to COM2 in the project file, you need to open the project file on your PC, change the setting to COM1, and then transfer it to TOP.
Run the [Project] - [Properties] menu; the [Project Options] screen will appear.

On the left side, under [Device Setup], you will see the PLC set to the COM2 port.
To move this PLC to COM1, click on the PLC and drag & drop it to [COM1].