【摘要】 介绍了ＰＬＣ扫描工作特征，基于此特征分析了计时器和工作时序，介绍了循环控制程序、输出响应速度快程序、“和”计数器程序的设计技巧，供从事ＰＬＣ控制的工程技术人员借鉴更多还原

【Abstract】 This paper introduces the working characteristics of PLC scanning, analises the working time sequence of counter based on the characteristics,and presents the programming skills of cycle controlling program,quick output response program,and the "Sum" counter program.This provider references for engineers in the field of PLC control.更多还原