以往的顺序控制器总有两个矩阵。一是条件一致矩阵(又称输入矩阵),二是顺序执行矩阵(又称输出矩阵),它们对操作者来说,是两个彼此独立而又有联系的矩阵。在改换顺序吋必须分别改变上述两个矩阵。这里介绍一种更简易而更直观的改换方法。它是通过一种通用器件(双刀双掷钮子开关)将两个矩阵连结在一起。改换顺序时只要 There are always two matrices in the order controller. First, the conditional consistent matrix (also known as the input matrix), the second is the sequential implementation of the matrix (also known as the output matrix), they are operators, is independent of each other and associated matrix. The two matrices must be changed separately when changing order. Here is a simpler and more intuitive way to change. It connects the two matrices together using a common device (double pole double throw toggle switch). As long as the order is changed