采用IEC 1131-3国际标准的优点

　　因采用一致的IEC 1131-3国际标准编程，各个PLC厂家的编程系统都是统一的，因而，对用户来说具有如下优点：

　　l 减少了人力资源，如培训、调试、维护和咨询的浪费

　　l 高水平软件再使用性，它聚焦于解决控制中的问题

　　l 减少了编程中的误解和错误

　　l 适用于宽环境范围的编程技术：通用的工业控制

　　l 连接来自不同程序、项目、公司、地区或国家的部件

　　IEC 1131-3软件：一种先进的工业控制编程系统 .

　　IEC 1131-3是第一个为工业控制系统提供标准化编程语言的国际标准，该标准针对工业控制系统所阐述的的软件设计概念、模型等适应了当今世界软件、工业控制系统的发展方向，是一种非常先进的设计技术，它不但极大地推动了工业控制系统的软件设计的进步，而且它的许多概念还对现场总线设备的软件设计产生了很大影响。符合IEC 1131-3的软件系统是一个结构完美、可重复使用、可维护的工业控制系统软件，不但能被应用在PLC（可编程控制器），而且还能被应用在控制工业及制造过程的一切软件中，是一种先进的工业控制编程系统。 IEC 1131-3标准包括两部分：编程和公共元素。编程部分描述了两个重要模型：IEC 软件模型和通讯模型。公共元素定义了编程系统中需要的的数据类型。

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