河北联合大学轻工学院
河北联合大学轻工学院
QINGGONG COLLEGE, HEBEI UNITED UNIVERSITY
毕业设计说明书
设计（论文）题目：选矿厂矿石破碎S7-300PLC控制系统梯形图
软件设计
学生姓名： +++ 学 号：+++++++++ 专业班级：++++++ 学 部：+++++
指导教师：+++ 教授
2012年05月23日
-
摘要
摘 要
选矿厂集中控制系统是指运用各种自动控制技术完成破碎筛分、磨矿分级、选别、脱水、过滤及精矿和尾矿的输送等选矿作业的控制系统。稳定性、准确性是系统必备的要素。该系统在工业生产中常以单片机或者可编程控制器（PLC）来完成控制功能。然而，以单片机实现的控制系统在安全、可靠及抗干扰的性能上要稍逊色于PLC。为此，在工业生产中大力开发使用PLC完成控制功能的选矿厂自动控制系统是非常必要的。本设计正是完成基于PLC为控制器的选矿厂综合自动化系统设计[1]。
随着计算机、网络、数据库等相关技术的不断发展和完善，自动化系统得到极大的完善。本设计中以S7—300 PLC为核心控制器，着重说明了选矿厂破碎和磨矿两个环节的控制流程、控制系统硬件配置、梯形图程序设计及整体系统的调试等情况。
PLC的应用极大地提高了选矿产品的质量和生产效率，在整个选矿行业具有广阔的应用前景。
关键词：选矿自动化，S7-300，PLC，破碎
I
河北联合大学轻工学院
Abstract
Concentrator centralized control system is the application of automatic control technology refers to the completion of crushing and screening, grinding and classification, sorting, dewatering, filtration and tailings concentrate and mineral processing operations, such as the transmission of the control system. Stability, accuracy is an essential element of the system. The system is often in industrial production or a single-chip programmable logic controller (PLC) to complete control. However, single-chip control system to achieve safe, reliable and anti-jamming performance slightly inferior to the PLC. For this reason, in industrial production and vigorously develop the use of PLC control functions to complete the speed batching system is very necessary. This design is precisely completes based on PLC is controller's ore dressing plant synthesis automated system design.
Along with the computer, the network, the database and so on correlation technique develops unceasingly and consummates, the automated system obtains the enormous consummation. This design emphasized the STEP7 software to select, installment, trapezoidal chart programming and integrated system's situations and so on debugging.
The PLC application improved the product quality and the production efficiency enormously, has the broad application prospect in the entire dressing profession.
Key Words：Automation of mineral processing，S7-300，PLC，Fracture
II
目录
目 录
摘 要 .............................................................................................................................I Abstract ......................................................................................................................... II 1 绪论 .......................................................................................................................... 1
1.1 选矿自动化系统简介 ........................................... 1 1.2选矿自动化的过程简述 ......................................... 1
1.2.1破碎过程自动化 ..................................................................................... 1 1.2.2磨矿过程自动化 ..................................................................................... 2 1.2.3磁选过程的自动控制 ............................................................................. 2 1.2.4浓缩过程自动控制系统 ......................................................................... 2 1.2.5精矿传送控制系统 ................................................................................. 2
2 可编程控制器的介绍 .............................................................................................. 4
2.1可编程控制器的概述 ....................................................................................... 4
2.1.1可编程控制器的发展史 ......................................................................... 4 2.1.2可编程控制器的特点 ............................................................................. 4 2.1.3 可编程控制器的分类 ............................................................................ 5 2.1.4 PLC的应用领域 .................................................................................... 6 2.2 S7-300简介 ...................................................................................................... 7
2.2.1 S7-300的硬件介绍 ................................................................................ 7 2.2.2 S7-300的CPU模块 .............................................................................. 7 2.2.3 CPU模块的分类 .................................................................................. 10 2.2.4 S7-300PLC的功能及扩展能力 ........................................................... 10 2.3 PLC编程语言 ................................................................................................ 11 3 选矿自动化控制系统总体设计方案 .................................................................... 13
3.1总设计思想 ..................................................................................................... 13 3.2选矿自动化控制系总体设计方案 ................................................................. 14
3.2.1破碎过程自动化解决方案 ................................................................... 14 3.2.2磨矿分级自动控制解决方案 ............................................................... 17
4 破碎系统 .................................................................................................................. 23
4.1破碎工程的建立 ............................................................................................. 23 4.2破碎阶段I/O端子的地址以及PLC内部地址（M）的分配 .................... 25
4.2.1破碎环节I/O点数统计 ....................................................................... 25 4.2.2破碎符号表 ........................................................................................... 27 4.3破碎系统PLC程序 ....................................................................................... 33
4.3.1破碎系统PLC程序的基本结构 ......................................................... 33 4.3.2破碎阶段PLC程序的结构以及各个程序块的功能 ......................... 34 4.4 仿真 ................................................................................................................ 60
4.4.2破碎阶段用S7-PLSIM和WinCC进行的联合仿真调试 ................. 63
5 结束语 ...................................................................................................................... 63 参考文献 ...................................................................................................................... 64 谢辞 .............................................................................................................................. 65
III