本文综述可编程控制器PC所使用的编程语言的发展和现状,各类编程语言的主要特点和适用范围,同时兼述 PC 的各类编程装置的特点和发展动态。 This article summarizes the development and current situation of programming languages ​​used by programmable controller PC, the main features and applicable scopes of various programming languages, and also points out the characteristics and development trends of various PC programming devices.