VB与三菱FX系列PLC通信，里面包含有PLC的梯形图程序以及VB的程序，用于PLC的编程口通信-VB and Mitsubishi FX series PLC communication, which contains the PLC ladder program and the VB program for the PLC programming port communication

VB与三菱FX系列PLC通信程序.rar(vb plc connection via 485 this is very important)