hedbisker

I know How to do it using C# by rs232 port but, It's not work using USB port

I am using CJ1W-PA202 I am programmer and try to read and write to it using C#

I have Omron PLC controller and I try to write and read from it by using USB port in C#. I have no idea how can I do it I tried it for some days. I succeed read and write by rs232 port and I need help for doing it using USB. Thanks.