文档介绍：:..基于西门子S7-ontrolSystembasedonSiemensS7-200Series总计毕业设计____39___页表格____3____个插图____10___幅摘要本论文是基于西门子S7-200系列PLC进行自动饮料售货机控制系统的设计的。本文介绍了PLC的硬件基本组成,特点以及工作原理。阐述了自动饮料售货机的来源,发展及系统设计的基本原理及工作流程。在PLC梯形图的编写时,,并完成了PLC外部接线图。利用PLC控制的自动饮料售货机提高了系统的稳定性,且逻辑上保证无或者尽量减少漏洞,使自动售货机能够长期稳定运行,不需要经常有人维护。关键词:ontrolSystemisbasedonSiemensS7-,,pilersoftwareversion4oftheSTEP7towrite,,andensurenoorlittleloopholes,thevendingmachinecanhavealong-termstableoperation,notoftenneedsomeonemaintenanceKeywords:automaticbeveragevendingmachine;PLC;ladderdiagram;Siemens目录摘要....................................................................IABSTRACT..................................................................II前言....................................................................1第1章可编程控制器PLC..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................9第2章自动饮料售货机的系统设计......................................................................................................................................................