The miniaturized PLC will develop to a more specialized use angle,for example,the function is more targeted,the application environment is more targeted,and so on.The boundary between large PLC and DCS gradually fades until they are completely merged.
DCS will continue to develop in the direction of FCS.In addition to the more decentralized control system,the core of FCS is instrumentation.The application of FCS in foreign countries has been developed to the instrument level.The control system only needs to deal with signal acquisition and provide man-machine interface and logic control.The control of the entire analog quantity is distributed to the field instruments.There is no need for traditional cable connection between the instrument and the control system,and the entire instrument system is connected by a field bus.
小型化的PLC将向更专业化的使用角度发展，比如功能更加有针对性、对应用的环境更有针对性等等。大型的PLC与DCS的界线逐步淡化，直至完全融和。
DCS将向FCS的方向继续发展。FCS的核心除了控制系统更加分散化以外，特别重要的是仪表。FCS在国外的应用已经发展到仪表级。控制系统需要处理的只是信号采集和提供人机界面以及逻辑控制，整个模拟量的控制分散到现场仪表，仪表与控制系统之间无需传统电缆连接，使用现场总线连接整个仪表系统。
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