基于Linux系统的软PLC的实现

The Realization of Soft PLC Based on Linux System

以具有开放式源码和良好可靠性的Linux系统作为软件平台,利用C语言开发了软PLC.给出软PLC的总体实现方法,并以指令表语言为例进行具体介绍.该软PLC由编辑环境和执行环境组成,共同完成软PLC编程语言的编辑、翻译及执行,采用共享内存技术实现信号的内部通讯.

The soft PLC is developed with C language,Linux system used as its software platform ,which has open source code and good reliability. This paper produce the whole realization method of the soft PLC,and take IL（introduction list）as an example make the concrete introduction. This soft PLC is composed by the edition environment and the execution environment two parts, they complete the whole work together which contains edition, translation and execution of the PLC program language. It use shared memory technology realize the signal＇s interior communication.