PLC计时器、计数器设定值的外设定方法

An Off-line Set up Method on Set up the Value of PLC Timer and Counter

本文以F1系列PLC为背景机，介绍了用数字投码开关及传送功能指令实现计时器、计数器设定值的外设定方法。其中包括数字技码开关与PLC输入端的连接和梯形图程序，还分析了程序运行过程，最后引入了输入电路“一点两用”的接线，说明了节省输入点的方法。

Taking Fl Series PLC as background machine,this paper presents an of f-line set up method to setup the value of PLC timer and counter by means of digit dial code switch and transfering function instructions,which includes the connection between digit dial code switch and the input ports of PLC and ladder-type patternprogramme. It also analysises the operation process of programme. Finally,the paper introduces 'one point twouse'connection in input circuit,and describes a method for saving input points..