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近30年来,随着控制技术、电子技术与数字计算机的结合,特别是微电子技术与MC(微型计算机)的迅速发展,控制系统处理的变量迅速地转变为数字量。MC是数字电路的化身,具有一系列优点,它与控制技术相结合,完全有可能实现全厂范围生产调度与控制,全部或单机生产最优控制以及各种工艺过程的最佳控制。目前MC应用日益向系统化、网络化方向发展,它的科学技术水平及应用的广度和深度,特别是在过程控制中的应用水平,已成为衡量一个国家现代化水平的重要标志。一、过程控制系统数字化或MC化的特点
In the past 30 years, with the combination of control technology, electronic technology and digital computer, especially the rapid development of microelectronics and MC (micro-computer), the variables of the control system are quickly converted into digital quantities. MC is the embodiment of a digital circuit with a number of advantages. Combining it with control technology, it is entirely possible to achieve plant-wide production scheduling and control, optimal control of all or standalone production, and optimal control of a wide range of processes. At present, MC applications are increasingly becoming systematic and network-oriented. Its scientific and technological level, its breadth and depth of application, and its application in process control in particular, have become an important indicator of the modernization of a country. First, the process control system digital or MC characteristics