使用VB.NET对PLC进行读写数据，方便快捷，对入门者有很好的编程-Use VB.NET to read and write PLC data, convenient, good programming for beginners

欧姆龙PLC串口通讯类，VS2015,VB.NET编程，需要绑定一个串口就可以进行通讯。-Omron PLC serial communications, VS2015, VB.NET programming needs to bind a serial port can communicate.