本文介绍了用VC++和MFC 开发的上位机和PLC 的通讯系统,给出了系统的通讯原理和系统的软件设计方法。实践证明整个系统运行稳定,实用性和可扩展性强。关键词:PLC VC++ MFC 通讯模式The Communication System Between Host Computer and PLC Based on VC++ and MFCYANG Donghai WENG Xinhua YANG Ruqing Abstract:This paper introduces the communication system between host computer and PLC using VC++ and MFC to develop. Its communication principle and software design method are given in the paper. In practicethe system is reliable and easy to extend and has good application value.Key words:PLC; VC++; MFC; communication mode
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