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笔者在本研究中对实现上位机通信的主要方法进行了详细的介绍,并深入分析了基于VB的PLC和上位机通信之间的通信协议,提出了基于VB的PLC和上位机通信的软件实现方法,给出了基于VB的PLC上位机通信的软件流程。此外,编写出的上位机通信软件在数据采集和监控系统得到了广泛的应用,证明了它能够可靠且稳定的运行,值得推广和使用。1基于VB的PLC和上位机通信之间的通信协议
In this research, the author introduces the main methods to realize PC communication in detail, and analyzes the communication protocol between PC and PC based on VB, and puts forward the software of PLC and PC communication based on VB Method, gives the PLC based on VB PC communication software flow. In addition, the compilation of PC communication software in the data acquisition and monitoring system has been widely used to prove that it can be reliable and stable operation, it is worth to promote and use. 1 based on VB PLC and PC communication between the communication protocol