随着电子元件的发展,工业控制仪表的功能和集成度在不断地提高。近年来,LSI制造工艺水平不断提高,使得微处理器及各种接口器件价格迅速下降,使得工业控制仪表智能化进程进一步加快。八十年代初出现的以微处理器为核心器件的“单回路调节器”是一种控制功能彻底分散化的仪表。它 With the development of electronic components, the function and integration of industrial control instruments are constantly improving. In recent years, the continuous improvement of the manufacturing technology of LSI makes the prices of microprocessors and various interface devices drop rapidly, which further speeds up the process of intelligent control of industrial control instruments. The emergence of the microprocessor-centric “single-loop regulator” that emerged in the early 1980s is a completely decentralized gauge of control functions. it