论文部分内容阅读
本文介绍了一种以ＰＬＣ为ＩＥＤ设备的新型ＳＣＡＤＡ系统的结构，并说明了ＳＩＥＭＥＮＳ公司的Ｓ７－２００系列的ＰＬＣ的功能和特点。分析和讨论了上．下位机之间的通信方式和工作原理，以及前置机与ＰＬＣ通信的县体实现。
This paper presents a structure of a new SCADA system that uses PLC as IED equipment and explains the functions and features of the S7-200 series of PLCs from SIEMENS. Analyzed and discussed on. Communication between the next crew and working principle, as well as front-end machine and PLC communications to achieve the county body.