毕业设计--FX2N系列PLC实现温度PID控制

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1、- 1 - 题 目 FX2N 系列 PLC 实现温度 PID 控制 内 容 摘 要 温度作为工业生产和科学实验中最普遍、 也是最重要的热工参数 之一。其精度对产品或实验结果会产生重大的影响。而可编程控制器 （PLC）可靠性高，抗干扰能力强，易学易用，采用PLC控制是其中一 种比较优越的控制。 本设计主题为“通过三菱PLC实现温度PID控制” 。主要内容为通 过FX2N-16MR和其扩展单元FX2N-4AD通过PID特殊功能指令实现单回 路闭环系统控制。 系统实现恒温箱内温度快速调整为设定值 （110） 保持恒定，当温度与设定值相差超过5时系统实现自动报警。系统 可以自动根据所测量恒温箱内的当前

2、实际温度与设定温度差异通过 调节恒温箱内电热丝通断时间调节温度， 使恒温箱内温度快速准确调 整为设定值。 关键词 温度控制；PLC；PID调节；A/D模块 - 2 - Abstract Temperature as industrial production and scientific experiments, the most common, and most important thermodynamic parameters. The accuracy of the product or its results will have a significant impact. The p

3、rogrammable logic controller (PLC), high reliability, strong anti-interference, easy to use, PLC control is one of the relatively superior control. The design theme is “realized through Mitsubishi PLC PID temperature control.“ The main contents are through FX2N-16MR and its expansion units FX2N-4AD

4、special function commands through the PID closed-loop system to achieve single-loop control. System to achieve rapid adjustment of thermostatic chamber temperature set value (110 ) remains constant when the temperature and the set value differ by more than 5 , automatic alarm system. The system can

5、automatically based on the measured temperature inside the current difference between the actual temperature and the set temperature by regulating the temperature inside the heating wire off time, the temperature inside the temperature quickly and accurately adjust the settings. Keywords Temperature control; PLC; PID regulator; A / D module - 3 - 目 录 一、一、 绪论绪论 1 1.1 PID控制技术概述 1 1.2 温度控制技术 . 1 1.3 系统过程分析 . 2 二、二、 硬件设计硬件设计