Siemens Industrial Control Network Technology Research And Application

Industrial control network technology plays an important role in automation systems nowadays. This paper is based on a project of a university constructing a laboratory on SIMATIC industrial control network. Here, technology of MPI(Multi-Point Interface) communication and PROFIBUS communication are researched, and the technological characteristics and the prospect of applying PROFInet are discussed. Also, several methods of communication based on MPI protocol are realized, and their differences and conditions for applying them are concluded. A method to judge a CPU whether it suppots DX communication based on PROFIBUS-DP protocol is also given clearly. The principle of OPC interface criterion for applications is researched, and normal applications and stuctures of different systems are conclued in SIMATIC industrial control network. Contents of WinAC system which is a automation product based on PC and its software interfaces are researched and applied. At the same time, similarities and differences between WinAC and traditional hardware-PLC are discussed. As the dependability of control systems is an important factor need to be considered in either soft-PLC systems or traditional hardware-PLC systems, technology on software-redundancy of S7-300 systems is studied, and some suggestions on designing those systems are also given.In this paper, those technologies above are researched and discussed, and a number of sample systems are designed to apply them, and relative methods are concluded.