Xomox公司于1978年开发了一种1100过程控制系统。数字控制元件是系统1100中的积木式部件,可以放在阀门定位器中,直接安装在调节阀上。它是一种新型的分散控制系统,把调节器与阀门定位器结合在一起,分散地安装在调节阀的膜头上,电子功能组件放在全天候的壳体中。它由一个阀门定位器,一个PID调节器及输入/输出信号调整器组成,全部功能由一台8位的微处理 Xomox Corporation in 1978 developed a 1100 process control system. The digital control element is a building block in system 1100 that can be placed in a valve positioner and mounted directly on a regulating valve. It is a new decentralized control system that combines a regulator with a valve positioner, discretely mounted on the membrane head of a regulator valve, and an electronic functional unit in an all-weather housing. It consists of a valve positioner, a PID regulator and input / output signal conditioner, all functions by an 8-bit microprocessor