摘要
本文介绍可编程序控制器功能指令的基本概念,举例说明功能指令的编程方法,并指出了编程时应注意的若干问题。
In this paper, the author introduces the basic concept of functional instruction of the Programmable Logic Controller (PLC), and points out, by a practical example, the programming skills and some problems which we must pay attention to.
关键词
可编程序控制器
功能指令
执行周期
programmable logic controller
functional instruction
operation cycle
