文档介绍：摘要
可编程控制器(PLC)是以微处理器为核心、集微机技术、自动化技术、通信技术于一体的通用工业控制装置。它具有功能齐全、使用方便、维护容易、通用性强、可靠性好、性能价格比高等特点,已在工业控制的各个领域得到了极为广泛的应用,成为实现工业自动化的一种强有力工具。
本课题研究的内容就是利用PLC技术实现自来水厂虹吸刮泥机的自动化控制,设计其电气控制系统,将最新的控制技术应用到工作过程中,提高虹吸刮泥系统的稳定性、可靠性和实时性。本文综述了PLC控制系统的一般结构;简述了PLC控制系统设计的原则、内容和步骤。针对该虹吸刮泥系统的特点和性能要求,采用了德国西门子公司S7-200系列中S7-214作为系统控制器,重点阐述了该系统的硬件、软件的设计方法,并简要分析了用计时器实现掉电自保的方法和用实时时钟功能实现自动定时刮泥的方法。
经过运行实践表明,以PLC控制的系统可靠性和实时性良好,完全满足系统设计要求,取得了良好的经济效益。
关键词:可编程控制器虹吸刮泥系统掉电自保实时时钟
Abstract
Programmable Logic Controller (PLC) is a kind of universal industrial control apparatus which is developed rapidly and used widely in recent years, taking microprocessor as its core, integrating puter technology, automation technology munication technology. It is applied very diffusely in varied field of industrial control with the characteristics such as all-round functions, flexible application, well reliability, high ratio of capability and price and easy maintenance and so on, having e a robust tool to realize industrial automation.
The content that this paper studied is to make use of PLC technology to realize the intelligent transformation of the scrape mud system, design the electric control system, apply the latest control technology to the lathe transform, and improve the stability of the scrape mud system, reliability and real time nature. The paper summarizes the general structure of PLC control system; puts forward the principle, content and step of PLC control system designing. Siphon blow against the system of soil characteristics and performance requirements Germany adopted a Siemens S7-200 series systems as a S7-214 controller focuses on the system's hardware and software design methods, focuses on the system's hardware and software design methods, Summary and Analysis of the timer used to achieve power-fail and try to keep the real-time clock function for automatic timing scratching the soil.
After running, practice shows that the PLC control system reliability and good real-time, fully satisfy the