基于S7-300的七段数码管倒计时实现方案  

Solution of Count-Down of Seven-Segment Digital Tube Based on S7-300 PLC

作　　者：刘振青 侯文利 姚仲坤 LIU Zhenqing;HOU Weni;YAO Zhongkun(Pengbo Operation Company,CNOOCCo.,Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油中国有限公司蓬勃作业公司,天津300459

出　　处：《天津科技》2024年第3期48-51,55,共5页Tianjin Science & Technology

摘　　要：S7-300可编程序控制器(Programmable Logic Controller,PLC)被广泛用于工业控制领域,是一种技术成熟、应用便捷的控制解决方案。在阐述S7-300 PLC中七段数码管硬件驱动方式及专用指令的基础上,列举基于计数器指令、减法指令、定时器指令的用于实现七段数码管倒计时显示的3种方法,通过对比其优缺点,为今后七段数码管倒计时显示的实现提出参照方案。S7-300 PLC is widely used in the field of industrial control.It is a control solution with mature technology and convenientapplication.This paper expounds the hardware driving method and special instructions of seven-segment digital tube in S7-300 PLC,and lists three methods based on counter instruction,subtraction instruction and timer instruction to display the count-down of seven-segment digital tube.By comparing the advantages and disadvantages of the three methods,a solution is proposed for the realization of count-down display of seven-segment digital tube in the future.

关 键 词：S7-300 七段数码管 倒计时 逻辑编程 

分 类 号：TH86[机械工程—仪器科学与技术]