SUPERVISORY CONTROL AND DATA ACQUISITION SYSTEM ( SCADA )

SUPERVISORY CONTROL AND DATA ACQUISITION SYSTEM ( SCADA )

ABSTRACT:

SCADA is the acronym for Supervisory Control And Data Acquisition. The term SCADA defines a computer system used for gathering and analyzing real time data coming from industrial processes. SCADA systems are used to monitor or to control a plant or equipment or chemical, physical or transport processes in the industry. All relevant information has to be shown to the operator in a clear and convenient way, conforming to current standards in process display graphics. This part of SCADA system is commonly known as the HMI (Human Machine Interface). The bulk of the site control can also be performed automatically by a remote terminal unit (RTU) or by a Programmable Logic Controller (PLC). One of the main purposes of a SCADA application is to provide an operator with the graphical interface needed to monitor and control the production processes in an industrial plant. Currently, most SCADA systems are based on bitmap graphics or proprietary vector formats to build the operator's interface. We investigate here the advantages and some of the emerging techniques of using a web standard SCADA such as SVG for developing the graphical components of a SCADA system and how to connect these components to the data sources that determine their appearance.

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