What are the similarities and differences between PLCs and DCS?
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What are the similarities and differences between PLCs and DCS? When to choose a PLC and when to choose a DCS? I would appreciate your advice!
Maybe you need to learn more*, my summary: http://bbs.hcbbs.com/thread-419840-1-1.html
The company has launched a new project involving chemical products, and it has been decided to use a DCS system. What are the differences and connections between a DCS system and a PLC system?
PLC, whose full name is Programmable Logic Controller, evolved from low-voltage switchgear. It supports programming in three languages, with ladder diagram programming being the most commonly used. DCS is a control system; its original name is Distributed Control System. It emerged in the last century as a system that makes use of 4C (CRT, COMMUNICATION, CONTROL, COMPUTER) technology in industrial applications
PLC stands for Programmable Logic Controller, while DCS refers to Distributed Control System. Generally, PLCs are used for smaller systems, and DCSs are used for larger systems.
DCS is a system concept, while PLC refers to a specific hardware device
The explanation on page 3 seems quite clear: SIEMENS S7-200, 300, 400 are PLCs, while SIEMENS S7 414 and above, along with configuration software, database cards, etc., constitute a DCS
Are there still people who learn PLC on their own? Nowadays, PLC is a complete system that includes a host computer, buses, touch screens, and 4-volt circuits.