Tuesday, September 22, 2015

What is the SCADA System?


A SCADA (supervisory control and data acquisition) system is a system that consists of a number of remote terminal units (RTU) that collect the field data and connected back to the station master through the communication system.

Accurate and timely data (usually a real-time) provide optimization of the operation of the plant and process. Another advantage is more efficient, more reliable and more important, safe operation. All this results in the operating cost is lower compared with the previous non-automated systems.

There is a reasonable level of confusion between the definition of SCADA systems and process control systems. SCADA have additional remote control or remote operation. The question is not how 'far' - that usually means more of a distance so that the distance between the location and control of the location controlled very large direct-wire control is not useful (for example, a communication link important component of the system).

SCADA successful installation depends on using proven and reliable technology, with comprehensive and adequate training of staff in the operating system. There is a history of failed SCADA systems - factors that contribute to this system, including inadequate integration of the various components of the system.

Today hardware reliability is less of a problem, but the increasing software complexity is producing new challenges. It should be noted in passing that many operators judge a SCADA system not only by the smooth performance of the RTUs, communication links and the master station (all falling under the umbrella of SCADA system) but also the field devices (both transducers and control devices).

Richard Binder, SCADA Security Specialist. Visit my website about SCADA at http://www.controlscada.com
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