Answer Posted / anisha

PLC and DCS are used based on the application such as where
programmable controlling is required. It has a controller in
it with inbuilt communication protocols. PLC is used in
small scale controlling application inorder to automate it
whereas DCS is used for controlling a large scale automated
industries. whereas SCADA i.e Supervisiory Control And Data
Acquisition. It is used for interfacing Purpose and
supervisiory.

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