57160001-NF ABB

One computer completes the control computing task,and the other computer completes the display task.In addition,as a controlled object,a process may need to display and control many points,some of which also require closed-loop control or logic operation.Each part of the process as a controlled object will be relatively independent and can be divided into several independent process,and then assign the input and output points that need to be displayed and controlled in the independent process in the computer control system to several computers,and the computing tasks that were originally completed by a small computer are transferred to several or dozens of computers.(controller)to complete.The failure of one of the machines does not affect the overall situation.The so-called”wolves instead of tigers”tactic is what it means to spread danger.The display,operation,printing and other management functions are centralized together,and the above two parts that complete the control and display are connected into a system by the network.At that time,some people called this system a distributed system.

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。