八路抢答器的PLC程序设计

实现抢答器功能的方式有多种,可以采用早期的模拟电路、数字电路或模数混合电路。近年来随着科技的飞速发展,单片机、CPLD、PLC的应用不断地走向深入,同时带动传统的控制检测技术的不断更新。现介绍的就是一种利用日本三菱(MITSUBISHI)公司生产的FX1N-40MR型PLC作为核心控制器的八路抢答器系统,并且给出了系统结构图、程序指令、梯形图以及输入输出端子的分配方案。

Programming on Answering Machine of Eight Groups Vies by PLC

There are many ways to realize the answering machine function, for example the earlier analog circuit, the digital circuit or the analog digital mixing circuit. Along with the fast development of science and technology in recent years, the application of SCM, CPLD and PLC go deep into life constantly, driving the updating of control and measure technology. The paper introduces a system of answering machine based on FX1N-40MR type PLC produced by Japan Mitsubishi company and illustrates the system structure diagram, program, ladder chart ,input and output terminal assignment.