SCADA Systems Hardware(And FirmWare)
. Introduction
This chapter introduces the fundamental concepts of DCS systems. The terms Supervisory Control and Data Acquisition (SCADA), Distributed Control System (DCS), Programmable Logic Controller (PLC), and Smart Instrument are defined and placed in the context used in this manual. The chapter is split into the following sections:
Definitions of the terms SCADA, DCS, PLC and smart instrument
Remote terminal unit (RTU) structure
PLCs used as RTUs
System reliability and availability
Communication architectures and philosophies
Typical considerations in configuration of a master station
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