基于PLC的两种液体混合配料控制器毕业设计稿专业论文.docVIP

毕 业 设 计 学生姓名 学 号 学院 物理与电子电气工程学院 专 业 电气工程及其自动化 题 目 基于PLC的两种液体混合配料控制器 指导教师 教授/硕士 2013 年 7 月 摘 要：本次设计主要是对两种液体混合搅拌机PLC控制系统的设计，在设计中针对控制对象：三只传感器监视容器高、中、低液位，设三电磁阀控制液体A、B输入与混合液体C输出，设搅拌电机M。搅拌机是一种将两种或多种以上材料搅拌混合的系统，对搅拌机的控制，关系到产品的质量，工艺流程是：放入液体A经低液位再注入至中液位，关A，放液体B至高液位，关B，启动搅拌电机M，搅60S后停，开阀放出混合液体C，低液位后延时5S 放空后关阀，又重复上述过程，要求工作过程中按下停止按钮后搅拌器不会立即停止工作，对当前混合操作处理完毕后才停止搅拌器。本设计采用、、、、 关键词：液体混料装置；自动控制；PLC ABSTRACT: The system is mainly of two liquids mixing and blending machine PLC control system, for controlling the object in the design: three sensors Jianshirongqi high, medium and low level, She three solenoid control liquid A, B input and the mixed liquid C output, set stirring motor M. Mixer is a two or more above the mixing material system, on the mixer control, related to the quality of the product, process is: A post placed in the liquid to be injected by the low level of liquid level, the relevant .A up to high level of liquid B, Guan B, start stirring motor M, after mixing 60S stop, open mixed liquid release valve C, the low level off after the delay after 5S emptying valve, then repeat the process, the course work required.Press the Stop button to stop working immediately after the mixer is not on the current operations have been disposed of to stop mixing blender. This design uses the Japanese Mitsubishi company to liquid mixture sm1N series PLC control system for the center, from the control system hardware system components, software used to the system design process including design, design process, design requirements, ladder design, external Connect Communications. KEY WORDS: liquid mixing equipment; automatic control; PLC 目 录 1 引言 4 2 PLC的发展历程及趋势 5 2.1 PLC发展历程 5 2.2 PLC发展趋势 5 3 PLC 原理及其机器指令 6 3.1 PLC的基本结构 6 3.2 PLC的基本原理 6 3.3 PLC的工作过程 7 3.4 PLC常用指令 8 4 混料罐控制系统方案设计 10 4.1系统的总体设计要求和示意图 10 4.2输入输出地址分配表和元件表 11 4.3 电气接线图 13 4.4工作状态流程图 13 4.5 系统的顺序功能图 15 4.6 应用程序和梯形图 15 4.7