1、 毕毕 业业 设设 计（论文）计（论文） 题题 目：目：基于 PLC 的液位控制系统-下位机设计 学生姓名：学生姓名： 学学 号：号： 专专 业：业： 电气工程及其自动化 班班 级：级： 1126 班 指导教师：指导教师： 2015 年年 5 月月 22 日日 摘要 I 摘摘 要要 随着当今社会科学技术的迅猛发展，各类监测并调控液位系统对自动化程度的要求也 越来越高，原有的水位控制系统，已远远不能满足当前高度自动化的需要。 本课题是研究通过 PLC 系统来控制水位，监控组态来模拟监控界面，实现生产的自动 化，可视化。本课题首先设计 PLC 控制系统，根据要求实现的功能分配 IO 口，接线，然
2、后编制通过 V4.0 step 7 软件进行梯形图的编辑、运行，并把现场的水塔水位状况实时传 送给上位机，上位机采用力控组态软件进行监控。 监控组态界面是通过 ForceContro7.0 进行监控界面的编写、运行。首先设计监控界 面，设置通信参数和 IO 口，使得上下位机能够可靠通信。本水位控制系统以 PLC 为控制 核心，具备开始和停止功能，这是一种 PLC 控制的自动调节控制系统。应用此控制系统能 显著提高劳动效率，减少劳动强度。 关键词：PLC 监控组态 STEP7 力控 Abstract Abstract With the rapid development of science a
3、nd technology in todays society.All kinds of monitoring and control system of liquid level of automation are increasingly high requirements.The original control system of water level, can not meet the current needs of the highly automated. This project is to research through the PLC system to contro
4、l water level monitoring, configuration simulation monitoring interface, realizing production automation, visualization.In this paper, the design of PLC control system, according to the functional requirements to achieve the distribution of I/O, then the preparation of wiring, editing, operation lad
5、der through V4.0 step 7 software, and the water level scene of the real-time transmission to the PC, PC monitoring using ForceContro7.0 configuration software. The configuration, operation monitoring interface is edited by ForceContro7.0 software. First, the monitoring interface design, communicatio
6、n parameters setting and I/O port, the computer can reliable communication. The water level control system using PLC as the control core, have open and all stop function, this is a kind of automatic control system PLC control. The application of this control system can significantly improve the work efficiency, reduce labor intensity. Keys words：PLC configuration step7 forcecontrol 目 录 III 目 录 摘 要 I Abstract. II 第一章 绪论. 1
