数控系统中PLC梯形图与指令表的转换算法  

Algorithm on Transforming PLC Ladder Diagram to Instruction Table in NC System

作　　者：罗海据 吴永明[2] 梁娟[3] 

机构地区：[1]广州数控设备有限公司,广东广州510530 [2]广东工业大学机电工程学院,广东广州510006 [3]华南农业大学工程学院,广东广州510642

出　　处：《机床与液压》2014年第4期64-68,共5页Machine Tool & Hydraulics

基　　金：广东省教育部产学研结合项目(2011A090200021)

摘　　要：为了满足数控机床系统中PLC梯形图向指令表转换的要求,将梯形图的构成形式分成母线、环、半环、环母线等结构元素,利用这些结构元素检验梯形图的合法性,分析梯形图和指令表之间的关系,设计梯形图向指令表快速转换的算法。应用实例表明:该算法效率高,实时性好,能满足数控机床系统的要求。In order to meet requirements of transforming the ladder diagram programmable logic controller （PLC）into an instruc-tion table for numerical control （NC）system in machine tool,the PLC ladder diagram was divided into some structural components in-cluding base-line,ring,semi-ring and ring-base-line,and etc.By using these components,the validity of PLC ladder diagram was checked,the relationship between PLC ladder diagram and instruction table was analyzed,and the algorithm about transformation from PLC ladder diagram to instruction table was designed.The application examples show that the algorithm is efficient and has good real-time,which is suitable for the NC system of machine tool.

关 键 词：数控系统 PLC 梯形图 指令表 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论]