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可编程序控制器（PLC）是目前较为流行的控制技术，其先进的技术水平，良好的性能价格比及方便简捷的配置组态方式面得了广大用户的青睐，并广泛应用到冶金、化工、机械和矿山等行业。而过程监控作为PLC控制系统的一个重要组成部分，也变得越来越引人注目。一个好的监控系统不
Programmable logic controller (PLC) is the most popular control technology. Its advanced technology, good performance and low price, convenient configuration and configuration are favored by the majority of users and are widely used in metallurgy, chemical industry, Machinery and mining industries. As an important part of PLC control system, process monitoring has become more and more attractive. A good monitoring system is not