可编程控制器时序逻辑控制的可扩展性设计  

Design of PLC sequential control system with easy extensibility

作　　者：邓有纬 尹强 李杨 

机构地区：[1]南京南自科林系统工程有限公司,江苏南京210032

出　　处：《华电技术》2013年第2期33-35,41,共4页HUADIAN TECHNOLOGY

摘　　要：针对火电厂可编程控制器(PLC)时序逻辑控制系统,阐述了时序逻辑的基本概念和设计方法,列举了2种时序逻辑设计思路,比较了2种设计思路的优缺点。实际应用表明,采用步序状态字与设备控制字相结合的方式来完成PLC时序逻辑控制系统,是一种比较简单清晰、易于扩展的时序逻辑设计方法。Aiming at the PLC sequential control system of thermal power plants,the basic conception and design method of the sequential logic were expounded.Two sequential logic design ideas were listed,and the advantages and disadvantages of the two design ideas were compared.The practical use shows that to adopt the combined method of the step sequence status words with the device control words to complete PLC sequential control system is a more simple and clear sequential logic design method with easy extensibility.

关 键 词：时序逻辑 步序 可编程控制器 梯形图 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]