基于PLC的混凝土配料系统设计

文档编号:ZD668    文档字数:17127,页数:36
摘 要
 采用智能配料控制器（CB920）和OMRON PLC配合实现称量、配方存储、通讯、控制等功能，具有价格低廉、高可靠性、高性能和智能化的特点。文档采用 MOXA卡用于扩展上位机的RS-232接口，实现上位机与下位机的通讯及对智能配料控制器（CB920）的控制。根据混凝土生产工艺的要求，完成了PLC梯形图的设计。通过软件的设计，使控制系统具备调整、手动和自动的控制功能，满足生产工艺的要求，运行稳定可靠。其中，调整工作方式用于试车和维修等；手动工作方式用于辅助生产，自动工作方式是主要的生产方式。研究开发分布式自动配料系统，对于改善劳动条件、提高产品质量和生产效率、完善现代企业管理具有十分重要的现实意义。文档对配料系统的应用背景、发展趋势进行了综述，以混凝土生产工艺为研究对象, 对自动配料系统的功能需求进行了分析，在此基础上设计了一个配料系统的总体结构和硬件实现方案。
关键词：智能配料控制器（CB920），混凝土，智能模块 

Abstract
 Using the intelligent ingredient controller (CB920) and OMRON PLC coordinates to realize functions of the weighing, the formula memory, communication, control, and so on,with characteristics of low in price,redundant reliability,high performance and intellectualization. The paper expands the Connection of superior machine RS-232 using the MOXA card, and realizes the communication between the superior machine and the lower position machine, and controlling to the intelligent ingredient controller (CB920) .According to the request of technique of concretes production, it has completed the design of PLC trapezoidal chart. The control system has the function of adjustment, manual and the automatic controlling with the software designing, satisfies the requests of technique of production, and moves stably reliable. And, the adjustment working uses in testing run and the service and so on; the manual working uses in the auxiliary production, and the automatic production is the main production method. Researching and developing the distributional automatic ingredient system has very important practical significance to improve the work condition, enhance the product quality and the production efficiency, consummate modern business management. The paper has the summaries of the ingredient system's application background, the trend of development, and taking the concretes technique of production as the object of study, it has carried on the analysis to the automatic ingredient system's function demand, so the realizing plan of the hardware and ingredient system's gross structure have been designed based on this.

Keywords:Intelligent Ingredient Controller (CB920)，Concrete ，Intelligent Module

目  录
摘 要 I
Abstract II
1 前言 1
1.1 研究背景及意义 1
1.1.1 商品混凝土的历史与发展 1
1.1.2 配料控制产生的背景和要求 2
1.2 自动配料系统的发展与应用 2
1.2.1 结构方式 2
1.2.2 控制系统 3
2 控制系统硬件设计 5
2.1 控制系统总体设计 5
2.1.1 生产工艺简介 5
2.1.2 工艺流程及要求 5
2.1.3  控制方案选择 7
2.1.4  I/O口分析及分配 8
2.2 准分布式自动配料系统的总体设计 12
2.2.1 基本功能要求 12
2.2.2  PLC的选择 12
2.2.3 智能配料控制器的选型 14
2.2.4  RS-232的扩展 17
3 控制软件设计 19
3.1 总体设计 19
3.2 计量过程 20
3.3 投料过程 21
3.4 搅拌过程 23
3.5 排料过程 24
4 电源 26
4.1导线或电缆的选择 26
4.1.1 导线截面的选择 26
4.1.2 关于导线或电缆的定量计算 26
4.2 电机启动方式 28
结论 30
致谢 31
参考文献 32

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