循环模拟控制4步设计方法

A 4-steps Design Method of Cycle Simulation Control

在各厂家的PLC(可编程逻辑控制器)实验设备上都有各种循环控制实验,但用PLC程序实现的方法有不同的版本,程序的设计没有规律,不便于掌握设计思路,文中介绍采用4步法实现PLC各种循环模拟控制,只要按步骤进行设计,关键是掌握时间控制电路的设计和循环次数的选择,重点是用好左移位指令,就能抓住循环模拟控制设计要点,并能方便地设计出所要求的控制程序,达到满意的循环控制要求。该方法具有通用性,对PLC的教学、实验、课程设计具有很好的借鉴作用。

Though all the PLC experimental equipments of every company have their own Cycle Control experiments, there are several versions of the PLC programming methods. We could not find the rules of program designing, so it isn＇t very easy for students to master it. This paper introduces a method of 4-steps design method for each PLC cycle simulation control implemention. The key of this method is the design of the circuit time control and the choice of the loop number, and its keystone is to master the use of the left shift instruction. If following the steps, we can grasp the design point of cycle simulation control, and can design easily the control programs which we want to be having satisfying result. This method can be used universally, and will be good for PLC teaching, experiment, and course planning.