利用VB的MSComm控件编程实现PC与三菱PLC FX系列通信，利用VB6.0以一个简单的例子来说明编写通信程序的要点。-The MSComm control using VB programming PC with Mitsubishi PLC FX series communication, using VB6.0 with a simple example to illustrate the preparation of communication of the procedure.

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)