labciew做的程序可以借鉴一下！适合初学者-labciew do what procedures can draw! For beginners!

用VB编程与三菱A系列PLC通信的源码,需要编写串口通讯工程的可以参考,(VB programming with Mitsubishi A series of PLC communication source code, the need to write serial communication engineering can refer to,)