1、 I 摘 要 混凝土搅拌站是随着水泥的诞生而产生和发展的。它是建筑、桥梁、道路、 大坝等工程施工中的必备设备，它由贮料、配料、放料等机构部件组成，是一个 受多环节制约的复杂系统。 而随着我国经济建设的高速发展， 综合国力不断增强， 国家对基础设计建设的投资力度加大， 拉动了城市商品混凝土的高速发展， 同时， 使混凝土搅拌站有了较大的发展空间，最初搅拌站仅以单机的形式出现， 混凝土 自拌自用，随着基础设施建设大规模的开展，产生了很大的商品混凝土市场，搅 拌站的需求越来越大，计量要求越来越高，于是出现了各种形式带有计量装置的 搅拌站，从而产生了现代的混凝土搅拌站。 本文针对 PLC 和配料控制控制
2、器结合控制的搅拌站来设计其控制及监控程 序设计中主要完成的任务有系统构造、PLC 的 I/O 分配、工作流程图及 PLC 程序 的编写。 关键词：混泥土搅拌站；I/O 分配；PLC；自动控制 II ABSTRACT Concrete mixing stations were produced and developed with the birth of cement. It is the construction of the necessary equipment for buildings, bridges, roads, dams and other projects. Its con
3、structed from storage materials, ingredients, stirring, discharge, and other structural components, and it is a subject to the constraints of the complex multi-link system. As Chinas economic construction and the rapid development, Comprehensive national strength constantly enhance the states infras
4、tructure construction investment increased to boost the citys rapid development of ready-mixed concrete, so that the concrete mixing stations have larger space for development, the initial Mixing station only in the form of stand-alone, self-mix concrete-occupied, with the construction of infrastructure facilities for large-scale, a lot of ready-mixed concrete market was developed, the demand for mixing stations are larger and larger, and measures are increasingly demanded, so the mixing s
