Description
后有人提出把控制和显示分开。一台计算机完成控制计算任务，另一台计算机完成显示任务。另外，一个工艺过程作为被控对象可能需要显示和控制的点很多，其中有一些还需要闭环控制或逻辑运算，工艺过程作为被控对象的各个部分会有相对独立性，可以分成若干个独立的工序，再把在计算机控制系统中独立的工序上需要显示和控制的输入、输出的点分配
到数台计算机中去，把原来由一台小型机完成的运算任务由几台或几十台计算机（控制器）去完成。其中一台机器坏了不影响全局。所谓“狼群代替老虎”的战术，这就是危险分散的意思。把显示、操作、打印等管理功能集中在一起，用网络把上述完成控制和显示的两部分连成一个系统。当时有人把这种系统称为集散系统。\
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