There are many new developments in the field of DCS-related, which are mainly manifested in the following aspects.
(1) The system function is developing in the direction of openness. The structure of traditional DCS is closed, and it is difficult to be compatible with DCSs from different manufacturers. The open DCS will give users greater autonomy in system integration, and users can choose equipment from different manufacturers to connect to the control system with software resources according to actual needs to achieve the best system integration. This includes not only the integration of DCS and DCS, but also the generalized integration of DCS with PLC, FCS and various control equipment and software resources.
(2) Instrument technology is developing in the direction of digitalization, intelligence and networking. The intelligent and networked development of industrial control equipment can further decentralize the function of process control and realize the "full digital" and "fully decentralized" control in the true sense. In addition, due to the high precision, good repeatability, high reliability, and two-way communication and self-diagnosis functions of these smart meters, the installation, use and maintenance of the system are more convenient.
(3) Industrial control software is developing in the direction of advanced control. The extensive application of various advanced control and optimization technologies is the most effective, direct and valuable development direction to explore and improve the comprehensive performance of DCS, mainly including the development and industrial application of advanced control, process optimization, information integration, system integration and other software. In the future, industrial control software will continue to develop in the direction of standardization, networking, intelligence and openness.
(4) The system architecture is developing in the direction of FCS. Purely from a technical point of view, there are three ways to integrate the fieldbus into the DCS at this stage: (1) the integration of the fieldbus on the I/O bus of the DCS system - through a fieldbus interface card hung on the I/O bus of the DCS, so that the information from the fieldbus seen in the DCS controller is as if it comes from a traditional DCS equipment card. For example, Fisher-Rosemount's DeltaV system uses this integration solution. (2) The integration of the fieldbus in the network layer of the DCS system - that is, the integration of the fieldbus system on the higher layer of the DCS network, this integration mode does not need to change the DCS control station, and has little impact on the original system. For example, Smar's 302 series fieldbus products can integrate its fieldbus functions at the DCS system network layer. (3) Parallel integration of the fieldbus with the DCS system through the gateway - The fieldbus and the DCS can also be integrated in parallel through the gateway bridge. For example, SUPCON's fieldbus system uses the HART protocol bridge to connect the system operator station and the field instrument, so as to realize the communication function between the fieldbus equipment management system operation station and the HART protocol field instrument.
The focus of DCS has always been on control, and it has used "decentralization" as a keyword. However, modern development focuses more on the integrated management of information in the whole system, and in the future, "comprehensive" will become its keyword, and it will develop in the direction of realizing the comprehensive automation of the control system, operation system, planning system and management system, and implement real-time control and optimization control from the bottom to production scheduling, operation and management, and even the strategic decision-making at the highest level, forming a flexible and highly automated integrated management and control system.
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