基于PLC过程控制系统的研究

摘要：本文主要阐述了用过程控制的方法对锅炉进行控制，通过组态和编程，使系统能根据生产负荷的需要，供应一定压力的和温度的蒸汽，同时使锅炉安全经济的条件下运行，实现控制要求。为了提高生产效率，保持稳定可靠运行，提供便利的监控手段，采用了PLC和组态软件控制，配置灵活，控制协调，性能可靠，使系统达到更高的自动化水平。
论文内容包括对过程控制系统发展和现状的综述;过程控制系统工作原理及总体设计;重点描述了硬件设计,软件设计西门子WinCC制作界面的细节及在上位监控系统的一些基本设计,以及PLC与上位机之间的通讯。最后对在这次设计中获得的结论与感受作为论文的结束。
此系统的监控清晰明确，准确把握系统当前的运行情况，提高系统的监控能力，简化了系统监控的操作，减轻了工人的劳动强度；同时对现场重要参数进行设定，保证了系统运行的可靠，将现场误操作的影响减小到最低程度。是一个高水平的自动化控制系统。
关键词：PLC；过程控制；组态软件；WinCC。 
 
Research on the Basis of PLC Process Control System

Abstract： This text has explained mainly that controls the boiler with the method that the course controls, through the configuration and programming, enable system according to the needs of production load, the steam of temperature of supplying certain pressure, make the condition of the safe economy of the boiler run at the same time, realize the control request. In order to improve production efficiency , remain stable and run reliably , offer the convenient supervision method, having adopted PLC and configuration software to control, it is flexible to dispose , control and coordinate , performance is reliable , make the system reach higher automatic level.
The content of the thesis includes to the control system development of the course and survey of the current situation ; Control system operation principle of the course and designing overallly; Describe hardware design , software design detail to make interface , WinCC of Siemens , go to some general designs , location of monitoring system especially, and PLC and going to the communication between the location machines. As the end of the thesis to the conclusion and feeling that are obtained in this design finally. The control of this system is clear and clear, hold the running situation with present system accurately, improve systematic control ability , the operation that the reduced system controls, has lightenned workers labour intensity; Establishing the important parameter of scene at the same time, what the security system is operated is reliable , reduce the influence operated by mistake at the scene to minimum extent. It is a high-level automatic control system.
The keyword： PLC; Process controlling; Configuration software; WinCC.

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