用visual c＋＋实现pc与plc之间的串行通讯
it is usually need to supervise and control gathering data and working status of plc in industry control.there are some ways such as vb,delphi,pb to carry out the requirement.visual c++ is an exploiture tool for bbbbbbs application program and has quite strong function in the aspect of image processing and database managing etc.it has faster speed to realize bottom communication control.using visual c++ and mfc,the authors implement the serial communication system between pc and plc.the paper introduces the communication protocol and software design bbbbbb and realizes data's sending and incepted rapidly,real-time auto-control accurabbby and quickly.this system is simple,economical,and reliable and has an application value,which has been applied successfully in real system.
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