Short definition
Distributed Control Systems (DCS) are distributed process control systems for complex, continuous production processes with a high channel and data density. They integrate control, regulation, visualization, data archiving and asset management in an integrated system architecture. DCS are characterized by high availability, scalability and comprehensive engineering tools. In large membrane filtration plants, they enable the central monitoring and control of several filtration stages, tank farms and auxiliary processes with thousands of I/O points.
Functional principle
DCS are based on a client-server architecture with redundant control and communication levels. Distributed controllers take over sub-processes and communicate via high-availability Industrial Ethernet networks. Operator Stations offer graphical process visualization with faceplate operation. Engineering Stations enable consistent configuration of control logic, graphics and databases. Historian systems archive all process data for the long term. Modern DCS such as Siemens PCS 7, ABB 800xA or Emerson DeltaV integrate Advanced Process Control (APC), Asset Management and Plant Intelligence.
Areas of application
DCS are predestined for large-scale, continuous membrane filtration processes in the water treatment or chemical industry. They coordinate complex process sequences across multiple plant sections, offer comprehensive batch functionality in accordance with ISA-88 and meet regulatory requirements such as FDA 21 CFR Part 11. The central data storage enables company-wide transparency and integration into ERP systems.
Typical areas of application:
- Large waterworks with several filtration stages
- Integrated production systems in the pharmaceutical industry
- Process water treatment in power plants
- Multi-product systems with batch management
- Site-wide process control systems with thousands of I/Os
Summary
DCS offer the highest level of integration for complex process systems with maximum availability and scalability. They enable consistent engineering, central data management and company-wide transparency. For operators of large filtration systems, they mean optimum process control, minimal operating costs and long-term investment security thanks to standardized platforms.
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