I use the Mitsubishi FX series PLC and the computer of Tsinghua Tongfang Fengrui 42A. I bought a USB-SC09-FXUSB-RS422 cable and also brought a CD. I installed it but could not communicate with the PLC.
It should work well, this cable 422 port has MD8M plug, plug in the PLC communication port, set the communication parameters to download the program (FX series PLC). Note that the local cable should be set to connect local connection to USB.
That is, parameters such as the baud rate should be set the same. Is that your local connection is the default one of the COM ports, and you select USB.
PLC Cable 