利用三菱MXComponent程序进行与fx2n,Q系列等PLC的通讯测试程序。有读取plc自带通讯口，或者232口，或者485通讯三种方式，方便工控人员学习用,Mitsubishi MXComponent use of procedures and fx2n, Q series PLC communications test procedure. Have read Communications plc own mouth, or 232, or 485 in three ways to fa

485读头测试程序(c++和delphi)-485 Read Test

本源代码实现了串口通信功能，采用delphi编程语言，实现了串口直接的通信，485通信-The source code to achieve the serial communication function, using Delphi programming language to realize serial communication, direct communication, 485