1、 I 摘摘 要要 学校以及一些企事业单位通常使用电铃声作为上下课、上下班等作息时间信号。 电铃已是学校以及一些企事业单位不可缺少的设备，随着社会的发展不但对其需求量 越来越大，对电铃的自动控制要求也越来越高，于是人们设计了通过不同控制方式来 实现的自动打铃系统。 本文介绍一种采用三菱 PLC 控制的作息时间自动打铃控制系统，详细地阐述了系 统的组成、系统硬件接线和系统软件设计，并详细介绍了系统工作原理。该系统具有 外设电路配置简单、扩展方便、操作容易，可靠性高实用性强等特点。该系统用于学 校电铃的自动控制，具有周末和假期控制功能和星期与时间的显示功能，实现了作息 时间无人控制的自动化、科学化管
2、理与操作。 关键词：作息时间控制系统，PLC，I/O 接线，软件设计 II ABSTRACT School uses the electricity tinkle of bells to be work and rest time signal such as on or off duty , going ahead to finish class generally as well as some anxiously expect institution. The electric bell has already been that school and a few anxiously e
3、xpect essential equipment of institution , has been with the development of society not only more and more big to its need amounts , the auto control to the electric bell has demanded also more and more highly , people has designed that the automation by the fact that diversity comes true coming the
4、 control mode strikes bell system thereupon One kind of the work and rest that PLC controls with adopt Mitsubishi time the main body of a book is introduced has stricken bell naval voluntarily , composition , system hardware connection and system software having set forth system detailedly have desi
5、gned, and introduced detailedly system operating principle. That system is easy to have the outside setting up the circuit deploy going to the lavatory simple , extended , handle , the good pragmatism of reliability waits for a characteristic by force. Have owed system the auto control being used fo
6、r school electric bell , have had the weekend and vacation controlling the function and the week display function with time , have realized the automation that the work and rest time self-service controls , have scientist administration and operation. Keywords: Control system of daily schedule, PLC, I/O works a telephone switchboard, The software is designed III 目目 录录 摘 要 - I 第 1 章 绪论 -
