1 / 20 目录 一、十人投票机控制的设计要求 ····································································································· 2 1、控制要求 ········································································································································ 2 2、设计任务 ········································································································································ 2 二、系统硬件设计 ···························································································································· 3 1、PLC 定义 ········································································································································· 3 2、PLC 的特点 ····································································································································· 3 3、PLC 的发展 ····································································································································· 4 4、PLC 的结构及各部分的作...
