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The difference between PLC, DCS and SCADA
In a narrow sense, DCS is mainly used for process automation, PLC is mainly used for factory automation (production line), and SCADA is mainly for wide-area needs, such as oil fields and pipelines that stretch for thousands of miles. From the perspective of computer and network, they are unified. The reason for the difference is mainly in the application requirements. DCS often requires advanced control algorithms. For example, in the oil refining industry, PLC requires high processing speed, because it is often used in For interlocking and even fail-safe systems, SCADA also has some special requirements, such as vibration monitoring, flow calculation, peak shaving and valley shaving, etc.
SCADA is the scheduling management layer, DCS is the plant management layer, and PLC is the field device layer.
PLC system, that is, programmable controller, is suitable for measurement and control of industrial sites. It has strong on-site measurement and control functions, stable performance, high reliability, mature technology, wide application and reasonable price.
DCS system, that is, distributed industrial control system, is an international advanced large-scale control system in the 1990s. It is suitable for industrial sites with a large number of measurement and control points, high measurement and control accuracy, and fast measurement and control speed. It is characterized by decentralized control and centralized monitoring, with networking communication capabilities, strong measurement and control functions, reliable operation, easy expansion, convenient configuration, and easy operation and maintenance. , but the system is expensive.
SCADA system, that is, distributed data acquisition and monitoring system, is a small and medium-scale measurement and control system. It combines the two advantages of the strong on-site measurement and control function of the PLC system and the network communication ability of the DCS system, and has a high performance-price ratio.
SCADA and DCS are a concept, PLC is a product, the three are not comparable
PLC is a product that can form SCADA and DCS.
DCS is developed from process control, PLC is developed from relay-logic control system, PLC is equipment, DCS and SCADA are systems.
To put it simply, PLC+SCADA=DCS, as far as I understand it, the control functions between them can be crossed, and it is also based on the control of this system to develop the advantages of the other party for your own use.
Many Original Brand new Hardware Available from TZ tech.
Feel free to Contact Bou for better deal!
+8617550776091
[email protected]
SCADA is the scheduling management layer, DCS is the plant management layer, and PLC is the field device layer.
PLC system, that is, programmable controller, is suitable for measurement and control of industrial sites. It has strong on-site measurement and control functions, stable performance, high reliability, mature technology, wide application and reasonable price.
DCS system, that is, distributed industrial control system, is an international advanced large-scale control system in the 1990s. It is suitable for industrial sites with a large number of measurement and control points, high measurement and control accuracy, and fast measurement and control speed. It is characterized by decentralized control and centralized monitoring, with networking communication capabilities, strong measurement and control functions, reliable operation, easy expansion, convenient configuration, and easy operation and maintenance. , but the system is expensive.
SCADA system, that is, distributed data acquisition and monitoring system, is a small and medium-scale measurement and control system. It combines the two advantages of the strong on-site measurement and control function of the PLC system and the network communication ability of the DCS system, and has a high performance-price ratio.
SCADA and DCS are a concept, PLC is a product, the three are not comparable
PLC is a product that can form SCADA and DCS.
DCS is developed from process control, PLC is developed from relay-logic control system, PLC is equipment, DCS and SCADA are systems.
To put it simply, PLC+SCADA=DCS, as far as I understand it, the control functions between them can be crossed, and it is also based on the control of this system to develop the advantages of the other party for your own use.
Many Original Brand new Hardware Available from TZ tech.
Feel free to Contact Bou for better deal!
+8617550776091
[email protected]
