3BSE015196R1 ABB

Process control refers to the closed-loop control of analog quantities such as temperature,pressure,flow,etc.,and is widely used in metallurgy,chemical industry,heat treatment,boiler control and other occasions.As an industrial control computer,PLC can compile various control algorithm programs to complete closed-loop control.PID adjustment is a commonly used adjustment method in closed-loop control systems.Large and medium-sized PLCs have PID modules,and many small PLCs currently have this function module.PID processing generally runs a dedicated PID subroutine.

过程控制是指对温度、压力、流量等模拟量的闭环控制，在冶金、化工、热处理、锅炉控制等场合有非常广泛的应用。作为工业控制计算机，PLC能编制各种各样的控制算法程序，完成闭环控制。PID调节是一般闭环控制系统中用得较多的调节方法，大中型PLC都有PID模块，目前许多小型PLC也具有此功能模块。PID处理一般是运行专用的PID子程序。