S7-200可编程序控制器在抢答器中的应用  

Using of S7-200 Programmable Controller in Answering Machine

作　　者：张建文[1] 林刚勇[1] 

机构地区：[1]东华理工大学电子与机械学院,江西抚州344000

出　　处：《科技广场》2008年第8期180-182,共3页Science Mosaic

摘　　要：用模拟电路、数字电路或模数混合电路制作的抢答器相当普遍,但其存在运行可靠性差、功能单一的缺点。若采用可编程序控制器制作抢答器,不仅克服了上述缺点,且比前者具有更大的优越性,即抗干扰能力强、运用稳定可靠、定时精确、功能扩展方便等优点。本文介绍一种利用西门子S7-200PLC作为控制器的四路抢答器系统,并且给出了系统输入输出端子的分配方案以及系统软件设计。Generally, the analog circuit, the digital circuit or the analog digital mixing circuit are used in answering machine, But there are many defects in this kind of answering machine, such as unreliability and inconvenience of functional expansion. If the programmable controller is used in answering machine, the defects above can be avoided , and the new machine has many advantages, such as good ability, accuracy of timing and convenience of functional expansion. The paper introduces a system of answering machine based on SIEMENS S7-200PLC and illustrates system input and output terminal assignment, system software design.

关 键 词：S7—200PLC 抢答器 软件设计 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]