1. System functions to the open direction
The structure of the traditional DCS is closed, DCS between different manufacturers is difficult to be compatible. The open DCS will be able to give users greater autonomy of system integration, users can choose different manufacturers of equipment and software resources according to the actual need to be connected to the control system to achieve optimal system integration. This includes not only the integration of DCS and DCS, including DCS and PLC, FCS and a variety of control equipment and software resources in a broad sense of integration.
2. instrumentation technology to digital, intelligent, network development direction
Intelligent industrial control equipment, network development, process control can be prompted to further decentralize the function of downward shift, to achieve the true meaning of the "all-digital", "fully decentralized" control. In addition, because of these intelligent instruments with high precision, repeatability, high reliability, and with two-way communication and self-diagnostic features, resulting in the installation of the system, the use of more convenient and maintenance work.
3. industrial control software is developing in the direction of advanced control
Widely used in a variety of advanced control and optimization technology is to tap and enhance the comprehensive performance of the DCS is the most effective, the most direct, but also the most valuable direction of development, including advanced control, process optimization, information integration, system integration and other software development and industrial application. In the future, industrial control software will continue to standardization, networking, intelligence and open development direction.
4. the system architecture to FCS direction
Purely from the technical point of view, at this stage, fieldbus integration in the DCS can be three ways:
① fieldbus in the DCS system I / O bus integration - through a fieldbus interface card hanging in the DCS I / O bus, so that the DCS controller to see the fieldbus to the information as from a traditional DCS device card. For example, Fisher-Rosemount launched the DeltaV system is such an integrated program.
② fieldbus in the DCS system network layer integration - is in the DCS higher layer network integration fieldbus system, this integration does not require changes to the DCS control station, the original system has less impact. Such as Smar's 302 series fieldbus products can be realized in the DCS system network layer integration of its fieldbus function.
③ fieldbus through the gateway and DCS system parallel integration - fieldbus and DCS can also be realized through the gateway bridge parallel integration. Such as SUPCON's fieldbus system, the use of HART protocol bridge to connect the system operator station and field instrumentation, thereby realizing the fieldbus equipment management system operator station and HART protocol field instrumentation between the communication function.
DCS control system technology development trend
(1) Development in the direction of integration
The development of standardized data communication links and communication networks, various single (multi-)loop regulators, PLCs, industrial PCs, NCs and other industrial control equipment to form a large system to meet the requirements of factory automation, and to adapt to the general trend of openness.
(2) Development in the direction of intelligence
The development of database systems, reasoning functions, etc., especially the knowledge base system (KBS) and the application of expert systems (ES), such as self-learning control, remote diagnosis, self-optimization, etc., artificial intelligence will be realized at all levels of DCS. Similar to the FF fieldbus, microprocessor-based intelligent devices such as intelligent I/O, PID controllers, sensors, transmitters, actuators, human-machine interfaces, PLCs have emerged one after another.
(3) DCS industrial PC
DCS composed of IPC has become a major trend, PC as a DCS operating station or node machine has been very common, PC-PLC, PC-STD, PC-NC, etc. is the PC-DCS pioneer, IPC has become the hardware platform for DCS.
(4) DCS specialization
DCS for more suitable for the application of the corresponding fields, we must further understand the process and application requirements of the corresponding specialties, in order to gradually form such as nuclear DCS, substation DCS, glass DCS, cement DCS and so on.