本文将结合化纤工业的两个控制实例,从开关逻辑的角度去讨论顺控系统的应用设计而不涉及顺控器的电子线路和矩阵图;讨论通过受控程序的“逻辑功能图”设计——或称程序编制——把现有的顺控装置用于工业控制的设计方法。这种方法比较简捷、直观而且也容易掌握。一、步进顺控系统的结构步进顺序控制系统一般由步进单元BJD、输入单元SRD、输入矩阵SRJZ、输出矩阵SCJZ和输出单元SCD等基本功能电路板构成(图1阴影部分)。其它单元是为系统增加辅助功能,如计时计数(SBD、JJD、YSD)、跳选(DWD、TSJZ)和故障音响(GYD)等等。 This article will combine the two control examples of the chemical fiber industry, from the switch logic point of view to discuss the application of the sequence control system design without involving the sequencer electronic circuit and matrix diagram; discussion through the controlled program “logical function diagram” design - - Or Programmed - The design method of using existing sequencers for industrial control. This method is relatively simple, intuitive and easy to grasp. First, the step-by-step sequence control system structure Step sequence control system is generally composed of stepper unit BJD, input unit SRD, input matrix SRJZ, output matrix SCJZ and output unit SCD and other basic functional circuit board configuration (shaded area in Figure 1). Other units are added to the system auxiliary functions, such as time counting (SBD, JJD, YSD), skip (DWD, TSJZ) and fault sound (GYD) and so on.