AN INTRODUCTION TO
AND DATA ACQUISITION
Fundamentals and Implementation
“Supervisory control and data acquisition,
or SCADA, is the control technology that
the operator of a controlled industrial
process or plant to obtain data from one
or more of its
distant facilities and send limited control
instructions to those facilities”
Four basic components of SCADA:
• Remote telemetry units (RTUs).
• SCADA master units.
• The communications network
A SCADA system performs four
• 1. Data acquisition
• 2. Networked data communication
• 3. Data presentation
• 4. Control
• 5. Human Machine Interface.(HMI)
• What is HMI?
• Role of HMI.
• What Does HMI Comprise?
DCS AND SCADA.
DIFFERENT USES OF SCADA SYSTEMS:
Mass transit: regulate electricity to subways, trams and trolley buses; to
automate traffic signals for rail systems; to track and locate trains and
buses; and to control railroad crossing gates.
Manufacturing: manage parts inventories for just-in-time manufacturing,
regulate industrial automation and robots, and monitor process and
DIFFERENT USES OF SCADA SYSTEMS(CONTD.):
Electric power generation, transmission and distribution: Electric utilities detect current
flow and line voltage, to monitor the operation of circuit breakers, and to take sections of
the power grid online or offline.
Buildings, facilities and environments: Facility managers use SCADA to control HVAC,
refrigeration units, lighting and entry systems.
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