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Comparison of technical details between PLC and DCS‌

‌PLC technical details‌:

·‌Control structure‌: PLC adopts a centralized structure. One controller is usually responsible for one or several specific tasks and is suitable for simple and independent control processes.

·‌Control mode‌: Mainly used for discrete control, emphasizing switch control and sequence control, such as machinery manufacturing, automated production lines and other scenarios‌.

·‌Programming and configuration‌: PLC programming is relatively simple, and control logic can be implemented through a variety of programming languages such as ladder diagrams and instruction lists.

·‌Expandability‌: The PLC network can form an independent control system or serve as a subsystem of DCS to achieve more complex control requirements‌.

DCS Technical Details:

· Control structure :DCS adopts a distributed control structure, including multiple control units, each unit is responsible for a different process, and forms a centralized monitoring system through network connection.

· Control mode: mainly process control, emphasizing continuous, real-time signal acquisition and control, suitable for dealing with continuous production processes in petroleum, chemical and other industries.

· Programming and Configuration :DCS configuration is more complex, including database generation, historical data generation, graph generation, etc., and the upper unit state is biased towards GUI, and the lower unit state is biased towards algorithms.

· System features :DCS integrates computer technology, communication technology, CRT display technology and advanced control technology to realize the decentralization of control functions and the centralization of data management.

These differences in technical details give PLC and DCS unique advantages in their respective application fields.

The SWAN team has been working in the field of PLC and DCS for many years. We mainly supply Rockwell-AB ¦ ABB ¦ Triconex ¦ Siemens ¦ ICS Triplex ¦ Yaskawa ¦ Pilz ¦ Schneider ¦ Mitsubishi ¦ Honeywell ¦ GE Fanuc ¦ Sick ¦ Bently ¦Beckhoff¦ Omron ¦ Delta ¦ P+F ¦ Foxboro ¦Pilz ¦ B&R ¦Bachmann.

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