摘要
随着现场总线的发展,西门子SIMATIC NET为工业自动化控制领域提供了完整的通讯解决方案,并考虑到车间级网络和现场网络的不同通信需求,分层次提供了MPI、Profibus和工业以太网通讯协议,实现工业控制系统中数据的横向和纵向集成。在实际应用中,通过三种网络都可以实现PLC间的信息交换,由于通讯协议、现场条件等因素使得每种方式都有其独有的个性特点,只有熟悉每种方式的细致内涵才能灵活运用,因此在介绍每种通讯协议的时候都会详细阐述参数的设置以及要调用的功能块,再通过在线实验来验证通讯的可行性和可靠性,提升理论知识,提高操作技能,最终掌握西门子PLC间通讯的真谛。
Along with the rapid development of Fieldbus, Simens SIMATIC NET has provided the complete solution of telecommunications for the industrial automation control domain-also considered the differences communicate demand between workshop network level and the worksite network level, provided MPI, Profibus and the industry ethernet communicate protocol is hierarchically, successfully achieved the integration of broadwise and longitudinal in the industrial data control systemien the practical application, the exchange of PLC information can be achieved by the three kind of networkseeach network has individuality characteristics because of communications protocol@pworksite condition factors and so onl-the only way to be utilized nimbly is familiar with each network＇s connotationl-thereforel-when introduce of each kind communications protocol may elaborate in detail of parameter establishmentl-as well as the function block, through the online experiment to confirms the feasibility and reliabil- ity of telecommunications, in order to improve theoretical knowledge and enhances the operation skill, mastery of essence Simens PLC telecommunication finally.
