目录
1 绪论.............................................................................................................................................................3
1.1 过程控制系统的发展概况与趋势.....................................................................................................3
1.2 PLC 的发展概况与趋势.....................................................................................................................4
1.3 组态软件的发展概况与趋势.............................................................................................................4
1.4 本文研究的主要容.............................................................................................................................5
2 水箱液位串级控制系统总体设计.............................................................................................................6
2.1 水箱系统的组成.................................................................................................................................6
2.1.1
西门子
PLC
控制系统
.................................................................................................................6
2.1.2 CPU
模块
.....................................................................................................................................7
2.1.3I/O
模块
.........................................................................................................................................7
2.1.4 I/O
接线图
....................................................................................................................................7
2.1.5
信号间的转换关系
......................................................................................................................8
2.2 双容水箱系统结构.............................................................................................................................9
2.2.1
双容水箱系统结构
......................................................................................................................9
2.2.2
双容水箱系统结构图
..................................................................................................................9
2.2.3
双容水箱对象特性
....................................................................................................................10
3 串级控制...................................................................................................................................................14
3.1 串级控制系统概述...........................................................................................................................14
3.2 串级控制系统的优点.......................................................................................................................15
3.3 串级控制系统的适用场合...............................................................................................................15
4 控制规律...................................................................................................................................................16
4.1 控制规律选择 ..................................................................................................................................16
4.2 PID 控制规律特点 ...........................................................................................................................16
4.3PID 控制调节规律.............................................................................................................................16
4.4 西门子 S7-200 系列 PLC 中 PID 指令的使用.................................................................................17
4.5 在 PLC 中的 PID 控制的编程..........................................................................................................18
4.5.1
回路的输入输出变量的转换和标准化
....................................................................................18
4.5.2
变量的围
....................................................................................................................................19
5 控制系统的设计.......................................................................................................................................20
5.1 系统设计 ..........................................................................................................................................20
5.1.1
水箱液位的自动调节
................................................................................................................20
5.1.2
左水箱右水箱液位串级控制系统
...........................................................................................21
5.2 硬件设计...........................................................................................................................................22
5.2.1
检测单元
....................................................................................................................................22
5.2.2
执行单元
....................................................................................................................................22
5.2.3
控制单元
....................................................................................................................................23
5.3 运行...................................................................................................................................................23
5.3.1
左水箱液位比例调节
................................................................................................................23
1 / 36
zxb2322726962022-05-01用户下载后在一定时间内未进行评价，系统默认好评。
VIP享7折，此内容立减5.97元 
