嵌入式PLC中顺序功能图向AOV的映射  

A method About Mapping from SFC to AOV Graph in Embedded PLC

作　　者：李强[1] 吴松松[1] 严义[1] 邬惠峰[1] 

机构地区：[1]杭州电子科技大学计算机学院,浙江杭州310018

出　　处：《控制工程》2013年第2期272-275,279,共5页Control Engineering of China

基　　金：浙江省重点科技创新团队支持(2010R50008)

摘　　要：为实现PLC顺序功能图语言向梯形图语言的转换,阐述了将PLC的顺序功能图映射为有向图的思想与实现算法。首先对顺序功能图图形网络的描述方式进行严格定义,提出了一种新的AOV节点定义,把顺序功能图中的步元件与其前后连接信息相结合抽象为AOV图的顶点,步元件之间的转换关系抽象为弧,然后在此基础上提出了统一的顺序功能图程序结构的表达方式。本算法在保持顺序功能图结构完整性的基础上,简化了模型,同时可以很好地检查其中的连接错误,为从图的角度研究顺序功能图向梯形图的转化打下了基础。基于本算法思想设计的可编程逻辑控制器编程平台也在实际应用中得到验证,进一步证明其正确性和可用性。To realize the conversion from the Sequential Function Chart program into Ladder diagram, the idea of mapping from sequen tial function chart to AOV graph and its realization algorithm is introduced. First, a strict definition for the graphic network description of sequential function chart is made, and a new definition of AOV node is proposed, combines the steps with its before and after connec tion information and abstract as AOV vertex, abstract the transition as AOV are ; then made a unified expression for different structures of the sequential function chart. This algorithm provides a basis for transforming SFC into Ladder Diagram in the point of AOV and is easy to implement and. A PLC programming platform based on this algorithm is in use.

关 键 词：可编程逻辑控制器 顺序功能图 层次结构 映射 AOV图 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]