“软件PLC”的设计与实现研究

摘要

本文首先介绍了PLC编程语言——语句表的结构和特点，接着讨论了语句表解释程序的词法分析和语法分析技术，以及运用面向对象的编程思想，构造语句表解释程序，实现PLC”软件芯片”等问题。%In this paper, we firstly introduces the architecture and character of the PLC language－STL. And then , the structure of STL interpreting program and the technique of lexical analysis and syntax analysis are discussed. We also attempt to develop the STL interpreting program, realized the “soft IC” of PLC.