摘要
用可编程序控制器（Ｐ）控制随机系统．ＰＣ的每个输出继电器有确定的开启条件、关断条件及其约束条件．根据这些条件可以写出每个输出继电器的逻辑方程，再由方程画出ＰＣ的梯形图程序．
In a random logic control system, each output relay of PC (programable contronler) ho definite on-off conditions. Ased on these conditions, we can obtain a output relay logic equation by which lader-shaped diagram of PC can be plotted.
出处
《西北纺织工学院学报》
1994年第3期302-305,共4页
Journal of Northwest Institute of Textile Science and Technology
