[1]王国栋,陈宏君,刘克金. 顺序控制图源代码形成方案设计与实现[J].计算机技术与发展,2016,26(03):149-153.
　ANG Guo-dong,CHEN Hong-jun,LIU Ke-jin. Design and Implementation of Source Code Generation for SFC Graphical Program[J].,2016,26(03):149-153.
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 顺序控制图源代码形成方案设计与实现()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
26
期数:
2016年03期
页码:
149-153
栏目:
应用开发研究
出版日期:
2016-03-10

文章信息/Info

Title:
 Design and Implementation of Source Code Generation for SFC Graphical Program
文章编号:
1673-629X（2016)03-0149-05
作者:
 王国栋; 陈宏君; 刘克金
 南京南瑞继保电气有限公司
Author(s):
 ANG Guo-dong; CHEN Hong-jun; LIU Ke-jin
关键词:
 ; 顺序控制; 双switch-case ; 代码生成; 状态切换
Keywords:
 ; SFC; dual switch-case; code generating; state switching
分类号:
TP31
文献标志码:
A
摘要:
 为实现顺序控制功能和状态转换功能图形程序转换成可执行的C语言程序，文中设计了顺序控制图的图形化编程符号、定义符号的C代码范式并实现C代码生成方法。首先，将顺序控制图形化页面分为任务页面、执行步页面和功能图子页面，可清晰地组织可视化程序；其次，设计多种符号块实现程序步顺序执行和转移控制；最后，根据图形化编程符号的拓扑顺序和控制逻辑生成对应的C语言代码。进一步提出基于双switch-case顺序控制图的任务函数代码生成模式，在第一个switch结构中更新状态变量的值，在第二个switch结构中根据新的状态变量值运行相应的控制函数，可在同一个运行周期内完成状态切换和动作执行。提高了嵌入式顺序功能程序的运行效率，适用于高实时嵌入式系统的顺序控制。
Abstract:
 To generate source code for SFC graphical program,it presents a source code generation scheme which designs graphical pro-gramming symbols for Sequential Function Chart ( SFC) and defines C code normal form for the symbols and generates real C code final-ly in this paper. Firstly,the scheme divides sequential function chart pages into three types including task page,execution step page and functional graph page,and manages all pages hierarchically. Then it designs various graphical symbols to achieve sequential execution and transfer control of SFC graph. Finally,it generates C code according to the topological structure and control logic of these graphical sym-bols. This scheme further promotes source code generation approach for dual switch-case SFC graph page by updating the value of status variables in the first switch structure and executing corresponding control functions in the second switch structure according to the updated status variables,thus completing status switching and function execution in exactly one operation cycle. It increases execution efficiency of embedded sequential function programs,which is suitable for sequence control of high real-time embedded systems.

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更新日期/Last Update: 2016-06-14