基于PLC的自动焊锡机控制系统设计.doc

摘要 PAGE LII 基于PLC的自动焊锡机控制系统设计 摘 要 随着现代技术的迅速发展，各种机械的应运而生，自动化已成为了社会发展的必然趋势，自动焊锡机也成为了工业生产中必不可少的产物。为了提高自动控制系统的可靠性和设备的工作效率，设计了一套以PLC为核心控制器的自动焊锡机控制系统，用来取代以往的较复杂的继电器—接触器控制。系统的核心部分采用了德国西门子公司生产的S7—200型PLC，因为在核心控制部分采用的是软件程序控制，从而在保证自动焊锡机正常运行这个要求的情况下，大大的提高了自动焊锡机故障检查与维修的方便性和容易性，同时还克服了手动操作带来的一些人为干扰因素，取得了良好的预期效果。 关键词：PLC，自动焊锡机，梯形图 Design of automatic soldering machine control system based on PLC ABSTRACT With the rapid development of modern technology, all kinds of machinery came into being, automation has become an inevitable trend of social development, automatic soldering machine has also become an essential product of industrial production.In order to improve the reliability of the automatic control system and equipment efficiency, the design of automatic soldering machine control system of a PLC as the core controller, is used to replace the more complex relay - contactor control. The core of the system with the production of Germanys Siemens S7-200 PLC, as used in the core part of the software program control, thus ensuring the case of automatic soldering machine uptime requirements, greatly improves the automatic soldering machines convenience and ease of troubleshooting and maintenance, but also to overcome the manual operation to bring some human disturbance factors, achieved the desired effect. KEY WORDS: PLC,Automatic soldering machine,Ladder 前言 目　录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc24014 前　言 PAGEREF _Toc24014 1 HYPERLINK \l _Toc28042 第1章 概述 PAGEREF _Toc28042 2 HYPERLINK \l _Toc32465 1.1 自动焊锡机的背景 PAGEREF _Toc32465 2 HYPERLINK \l _Toc32440 1.2 自动焊锡机的意义 PAGEREF _Toc32440 2 HYPERLINK \l _Toc17469 第2章 硬件设计 PAGEREF _Toc17469 4 HYPERLINK \l _Toc17077 2.1 自动焊锡机的结构及控制过程 PAGEREF _Toc17077 4 HYPERLINK \l _Toc15908 2.2 PLC简介 PAGEREF _Toc15908 5 HYPERLINK \l _Toc31619 2.3 PLC工作原理 PAGEREF _Toc31619 6 HYPERLINK \l _Toc14295 2.4 PLC的选取 PAGEREF _Toc14295 8 HYPERLINK \l _Toc23350 2.5自动焊锡机I/O分配表 PAGEREF _Toc23350 9 HYPERLINK \l _Toc1784 2.6 自动焊锡机外部接线图 PA