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What is DCS?
Distributed Control Systems (DCS) is a computerized control system for a process or plant that consists of a large number of control loops, in which autonomous controllers are distributed throughout the system, but there is central operator supervisory control.
What is the difference between PLC and DCS?
Processing time for tasks are typically very fast, operators usually interact and control the system using some sort of graphical display such as SCADA. A DCS is used for continuous, complex controls, have an integrated control center much like a SCADA, which is the core of the system versus the processors in a PLC system.
What is the hierarchy of a DCS?
DCSs are by definition hierarchical systems, although not all systems share an identical hierarchy. The image below shows a typical DCS. Individual controllers, supervised by master controllers, make up the lowest “field” or “plant” level of the hierarchy.
What are the advantages and disadvantages of DCS?
The major advantage of DCS is the redundancy of some or all levels of the control area. Most of the cases critical processes are installed with redundant controllers and redundant communication networks such that problem in main processing line should not affect the monitoring and control functions because of the redundant processing section.
What is the difference between a DCS and a system integrator?
And, a DCS is the better solutions when the process is complex and requires frequent adjustments or must analyze a large amount of data. To provide integration services and implement process changes, DCS vendors require users to employ them. System integrators perform similar functions for PLC-based systems.
How does DCS integrate with process plants?
Individually controlling, reporting, and monitoring the components are enabled using integrating distributed control systems with process plants. To manage the database, control logic, graphics, and system security, DCS uses a set of configuration tools.