Connecting Mitsubishi FX3U-128M


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I try to connect Mitsubishi FX3U-128M plc with PC. But it is not connecting (An unusable Com port selected). what to be set in Transfer setup or any other settings to be done. Previously i am using Mitsubishi Q series PLC i done the same settings over here. please guide me to solve this problem
Open control panel, then system, select hardware ,open device manager, you can find which port you are using letsay 'com7'. Then open GX developer, go to online, transfer set up, click on PC side i/f serial port, select com port 'com7', transfer speed can be 9.6~115.
then click ok and carry out a connection test. It will be okay if the communication cables are good.

E&I Engineer
Sinco Automation Pte ltd, Singapore.