论文题目：基于S7-300 PLC的PID单闭环控制系统仿真 年 级：2012级
院 系：机电工程与自动化学院 学生姓名：安志博 学 号： 指导老师：郑伟 日 期：2015年5月
目 录
摘 要 .............................................................................................................................. 1 Abstract .......................................................................................................................... 2 第一章 绪论 .................................................................................................................... 3
1.1 PLC简介 ............................................................................................................ 3
1.1.1 PLC产生与发展 ..................................................................................... 3 1.1.2 S7-300PLC介绍 ...................................................................................... 3 1.1.3 SIMSTIC人机界面 ................................................................................. 4 1.2 模拟量闭环控制介绍 ....................................................................................... 4
1.2.1 模拟量与数字量 .................................................................................... 4 1.2.2 模拟量闭环控制系统结构 .................................................................... 4 1.2.3 PLC模拟量控制的特点 ......................................................................... 5 1.3 PID单闭环控制系统研究意义 ......................................................................... 5 第二章 PID控制原理 ..................................................................................................... 7
2.1 PID调节基准 ..................................................................................................... 7 2.2 比例控制 ........................................................................................................... 7
2.2.1 比例控制作用 ........................................................................................ 7 2.2.2 比例控制规律 ........................................................................................ 7 2.3 积分控制 ........................................................................................................... 8
2.3.1 积分控制缺点 ........................................................................................ 8 2.3.2 积分控制调试 ........................................................................................ 8 2.3.3 积分控制规律 ........................................................................................ 8 2.3.4 比例积分（PI）控制规律 ..................................................................... 9 2.4 微分控制 ........................................................................................................... 9
2.4.1 微分控制缺点 ........................................................................................ 9 2.4.2 微分使用条件 ........................................................................................ 9 2.4.3 微分控制规律 ...................................................................................... 10 2.4.4 比例微分（PD）控制规律 ................................................................. 10 2.4.5 PID 控制规律 ....................................................................................... 10 2.5 PID 控制参数整定 .......................................................................................... 10
2.5.1 单因素优选法介绍 ...............................................................................11 2.5.2 参数整定 ...............................................................................................11
第三章 S7-300 PID闭环控制系统 ............................................................................. 12
3.1 S7-300 PID闭环控制系统 .............................................................................. 12
3.1.1 PID闭环控制系统PLC选型 ............................................................... 12 3.1.2 PID单闭环仿真系统结构 .................................................................... 12 3.2 用户程序的逻辑块和数据块 ......................................................................... 12
3.2.1 FB 41 功能块介绍 ................................................................................ 12 3.2.2 OB35 循环中断组织块介绍 ................................................................ 15 3.2.3 OB100 组织块介绍 .............................................................................. 16 3.3.4 共享数据块DB介绍 ........................................................................... 16
第四章 S7-300 PID控制的编程与仿真实验 ............................................................. 17
4.1 PID单闭环控制系统程序 ............................................................................... 17
4.1.1 S7-300和HMI组态 ............................................................................. 17 4.1.2 S7-300 PID控制程序 ........................................................................... 17 4.1.3 WinCC flexible PID仿真界面 .............................................................. 20 4.2 PID控制系统参数整定仿真实验 ................................................................... 24
4.2.1 程序下载仿真 ...................................................................................... 24 4.2.2 PID控制系统参数调整 ........................................................................ 24
第五章 全文总结 .......................................................................................................... 27 致谢 ................................................................................................................................ 28 参考文献 ........................................................................................................................ 29 中英文翻译 .................................................................................................................... 30
摘 要
在现代工业控制系统中，PID控制技术应用非常广泛。然而，用实际的单闭环控制系统进行PID控制器参数整定的话，会存在一定的风险。这篇文章介绍的是，通过使用PLCSIM软件对PID单闭环控制系统进行模拟仿真实验，使用WinCC flexible软件对仿真界面进行创建，并用界面中的I/O域进行参数的修改起到调节PID的作用。综合的分析和判断调节参数，使PID单闭环控制系统得到较好的响应曲线。本文还对PID单闭环控制系统PLC编程和仿真界面制作还有PID控制原理进行了详细的介绍和说明。
关键字：S7-300PLC、PID单闭环控制系统、仿真
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Abstract
In modern industrial control systems, PID control technology is widely used. However, the setting, then there will be some risk with the actual single closed-loop control system PID parameters. This article is by using PLCSIM software PID single loop control system simulation experiments, using the WinCC flexible software simulation interface to create and modify the parameters used in interface I / O field play a regulatory role in PID. Comprehensive analysis and judgment adjustable parameters, so that a single PID loop control system to get a better response curve. This paper also PID single loop control system PLC programming and simulation as well as PID control principle interface make a detailed introduction and description.
Keywords: S7-300PLC, PID single closed-loop control system, simulation
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基于S7-300 PLC的PID单闭环控制系统仿真
