【摘要】 可编程序控制器是一种数字式的电子装置。为了解决PLC技术进步和学校教育成本的矛盾,我们自主开发一种虚拟PLC软件。在软件的设计中我们吸取了面向对象设计方法的思想,将软件开发成具有良好可复用性、可扩展性的系统。我们为了达到高仿真度的功能需求,提高软件的容错性能,深入研究了PLC的编程输入逻辑,设计出了具有很强针对性的键盘识别逻辑结构,达到了良好的效果。更多还原

【Abstract】 Programmable logic controller is a sort of digital electronic equipment.We developed virtual PLC software independently.It is used for resolve the contradiction of technical progress and asset of colleges.In the developing of software,we absorbed the theory of the object orientation.In the farther working we planned to make a software system,which has strong reusability and extendibility.During the software developing,we try to improve the fault tolerance.We try to make the software take on high emulation.We investigated the PLC,and developed keyboard identifying logic structure with strong pertinence.更多还原