PLC microcomputer applications in industry more widely, these source code is written on the PLC MCU communication between the PC, well, worth a visit.

pcDUIplc\6.2.1 PLC端程序\6.2.1.1 PC与西门子S7-200 PLC串口通信PLC端（下位机）程序\plc2.txt
........\................\........................................................\plc224.mwp
........\....2 利用C++Builder实现PC机与PLC串口通信程\6.2.2.1 利用C++ Builder实现PC与西门子S7-200 PLC串口通信\plc.bpr
........\............................................\........................................................\plc.cpp
........\............................................\........................................................\plc.exe
........\............................................\........................................................\plc.obj
........\............................................\........................................................\plc.res
........\............................................\........................................................\plc.tds
........\............................................\........................................................\plc1.cpp
........\............................................\........................................................\plc1.ddp
........\............................................\........................................................\plc1.dfm
........\............................................\........................................................\plc1.h
........\............................................\........................................................\plc1.obj
........\............................................\......2 利用C++Builder实现PC与三菱FX2N-32MRPLC串口通信\plc.bpr
........\............................................\.......................................................\plc.cpp
........\............................................\.......................................................\plc.exe
........\............................................\.......................................................\plc.obj
........\............................................\.......................................................\plc.res
........\............................................\.......................................................\plc.tds
........\............................................\.......................................................\plc1.cpp
........\............................................\.......................................................\plc1.ddp
........\............................................\.......................................................\plc1.dfm
........\............................................\.......................................................\plc1.h
........\............................................\.......................................................\plc1.obj
........\....3 利用Visual C++实现PC机与PLC串口通信程\6.2.3.1 利用Visual C++实现PC与西门子S7-200 PLC串口通信\mscomm.cpp
........\............................................\.......................................................\mscomm.h
........\............................................\.......................................................\plc.aps
........\............................................\.......................................................\plc.clw
........\............................................\.......................................................\plc.cpp
........\............................................\.......................................................\plc.dsp
........\............................................\.......................................................\plc.dsw
........\............................................\.......................................................\plc.h
........\............................................\.......................................................\plc.ncb
........\............................................\.......................................................\plc.opt
........\............................................\.......................................................\plc.p

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