. . . .
1.3.1PLC
的基本工作原理
.................................................................................................................................2
1.3.2PLC
编程方式
............................................................................................................................................3
1.4PLC 的控制系统发展趋势................................................................................................................................3
1.5 PLC 控制系统的构成设计原则与步骤...........................................................................................................4
1.5.1PLC
的设计原则
.........................................................................................................................................4
1.5.2PLC
的设计步骤
.........................................................................................................................................4
2 硬件设计..................................................................................................................................................................6
2.1 工作过程...........................................................................................................................................................6
2.2I/O 地址分配......................................................................................................................................................6
2.3 选择硬件...........................................................................................................................................................7
2.3.1CPU224.......................................................................................................................................................7
2.3.2
双向晶闸管
................................................................................................................................................8
2.3.3
热电阻原理构造
........................................................................................................................................9
3PID 的介绍................................................................................................................................................ ...............9
3.1PID 的工作原理.................................................................................................................................................9
3.2PID 参数整定...................................................................................................................................................11
3.3 PID 模块介绍..................................................................................................................................................12
3.3.1 PID
回路表的格式与初始化
..................................................................................................................12
3.3.2PID
程序
...................................................................................................................................................13
4 程序........................................................................................................................................................................17
4.1 顺序功能流程图.............................................................................................................................................17
4.2 程序设计.........................................................................................................................................................19
结 束 语.................................................................................................................................................................24
辞..........................................................................................................................................................................25
参考文献...............................................................................................................................................................26
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