SYSTEMS SCADA

SYSTEMS SCADA

SCADA stands for Supervisory Control And Data Acquisition. A SCADA system is based on computers that monitor and remotely control a system, process or system with different characteristics. Unlike Distributed Control Systems, the control loop is usually closed by the operator. Distributed Control Systems are characterized by performing control actions automatically. Today it is easy to find a SCADA system performing tasks automatic control in any level, but their main task is monitoring and control by the operator.

APPEARANCE	SCADA
TYPE OF ARCHITECTURE	CENTRAL
PREVAILING RATE CONTROL	Supervisory: control loops closed by the operator. Additionally: sequential and regulatory control.
TYPES OF VARIABLES	decoupled
ACTION AREA	Geographically distributed areas.
UNIT DATA ACQUISITION AND CONTROL	Remote PLC's.
MEDIA	Radio, TV, telephone lines, direct connection, LAN, WAN.
DATABASE	CENTRAL