说明：  将串口与三菱PLC通讯的方法封装成类,只需要将三个类加入到工程中,然后,参照CPLC类中已有的方法,定制特定的方法实现特定的控制,快速地开发出由计算机控制PLC的程序(三菱PLC是最普遍的可编程控制器,倾情奉献,非常有用!)
(Mitsubishi PLC to the serial communication method with the package into class, only three classes to join the project, and then, with reference to existing methods CPLC class, customized particular method to achieve a specific control, and quickly developed a computer-controlled PLC program (Mitsubishi PLC programmable controller is the most common, Decent, very useful!))