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MotivationProgrammableLogicControllers(PLC),acomputingdeviceinventedbyRichardE.Morleyin1968,havebeenwidelyusedinindustryincludingmanufacturingsystems,

一个有系统的方法来设计PLC的软件可以克服的缺陷,在传统的方式编程制造控制系统,可以产生广泛影响的几个工业应用.自动化控制系统是模拟的正式语言或,equivalently,由国家机器.正式交涉,提供一个高层次的描述系统的行为被控制.国家机器可以分析评价,以查明他们是否达到预期目标.其次,状态机的描述

ntroductionofProgrammablecontrollersFromasimpleheritage,theseremarkablesystemshaveevolvedtonotonlyreplaceelectromechanicaldevices,buttosolveanever-inc

The working principle of the programmable logic controller and the computer is consistent basically, finish the task through the application in brief