Answer Posted / bill
DCS stands for Distributed Control System and incompasses
many control elements intergrated into a complete System
It is computer based and incorporates sophisticated sub-
systems and software, such as SCADA, HMI , HART , PLC's ,
Universal Fieldbus , etc.
PLC stands for Programmable Logic Control and can function
as a stand alone controller or a subsystem device. Modbus
Profibus , DeviceNet , etc. are used to interface or link
communication between Systems and Subsystems including
other PLC's
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