What is difference between PLC and DCS

Question

Accepted Answer

PLC and DCS are both control systems used in industrial automation, but differ in their architecture and application.

PLC stands for Programmable Logic Controller and is used for discrete control applications.
DCS stands for Distributed Control System and is used for process control applications.
PLC is typically used in smaller systems with limited I/O points, while DCS is used in larger systems with extensive I/O points.
PLC is designed for standalone operation, while DCS is designed for networked operation.
PLC programming is ladder logic-based, while DCS programming is typically function block or structured text-based.
PLC is commonly used in manufacturing industries, while DCS is commonly used in industries like oil and gas, power plants, and chemical processing.
Example: PLC can be used to control a conveyor belt in a factory, while DCS can be used to control the entire operation of a power plant.

Accepted Answer

PLC : Programmable logic controller
DCS : Distributed Control System

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