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

232 Terminal in Delphi. Open serial port com, send data, receive data etc.

Delphi同时实现串口和TCP网口通讯调试功能的源码，非常常值得收藏。-Delphi com/232 and tcp.

obd2汽车故障及状态检测程序，用delphi SPCOMM 232通讯方式发送OBD2指令-using OBD2 protocol to query status or read the fail code the car ,sending the OBD2 Command using delphi code with spcomm