基于PLC的液体溷合控制本科毕业设计..docVIP

摘要PLC PID参数PID指令 Abstract The request is to a certain proportion by the three liquid mixture,stirring after the motor to reach a certain temperature can be mixed containers of liquids output,and form a cycle.Liquid hybrid systems of control designed taking into account the continuity of its action and charged with various equipment moves between the interrelated,and for different working conditions,and make the appropriate motor control output,thus realizing the liquid hybrid systems from the first liquid added to the mixture to complete the output of such a cycle control of the program.Designed to liquid mixed as the central control system,control system from the hardware components,software system to choose the design process (including design,design process,design requirements,the ladder design,external communications link,etc.),PLC creation and definition, process control development, FX2N series PLC hardware control, PID tuning parameters and various parameters of the control performance comparison,the entire system, introduce and explain the various parts of the PLC process control commands PID instruction to control the parameters precisely.Which seeks to the design and production process of doing brief introduction and description. Keywords：.Liquid hybrid systems cycle control ladder design FX2N series PLC PID parameters PID instruction 目录 摘要 - 1 - ABSTRACT……………………………………………………………………- 1 - 绪论 - 4 - 元件介绍及硬件电路设计 - 12 - 3.1 三菱PLC控制系统 - 12 - 3.1.1 CPU模块 - 13 - 3.1.2 I/O模块 - 13 - 3.1.3电源模块 - 14 - 3.4 电磁流量计 - 16 - 3.5模拟量输入输出模块 - 17 - 4.1 软件设计思想 - 20 - 4.2 PID调节的各个环节及其调节过程? - 22 - 4.2.1比例控制及其调节过程 - 23 - 4.2.2比例积分调节 - 23 - 4.2.3比例积分微分调节 - 23 - 4.3 三菱FX2系列PLC中PID指令的使用 - 24 - 4.4 在PLC中的PID控制的编程 - 25 - 4.4.1回路的输入输出变量的转换和标准化 - 25 - 4.5变量的范围 - 27 - 5.1 硬件调试方法 - 28 - 5.1.1 常见的硬件故障 - 28 - 5.1.2系统常见故障分析及维护 - 29 - 结论 - 31 - 参考文献 - 32 - 第一章 绪论 1.1 课题的背景与意义 1968年，美国最大的汽车制造商通用汽车（GM）公司提出了公开招标方案，设想将功能完备灵活通用的计算机技术与继电器便于使用的特点相结合，把计算机的编程方法