Sunday, April 14, 2013

What are SCADA Systems?

SCADA is a word that is used mostly to portray management and control solutions in a broad range of businesses. Some of the businesses where SCADA are used are Electric Power, Water Management Systems, Mass Transit Systems, Manufacturing Systems, Environmental Control Systems, and Traffic Signals.

SCADA as a System

There are several parts of a working SCADA. A SCADA-system generally takes account of signal hardware (the input and the output), networks, controllers, communications equipment, user interface (HMI), and software. At one fell swoop, the word SCADA refers to the entire central system. This central system typically monitors information from different sensors that are both off-site or in close proximity.

User Interface (HMI)

A SCADA scheme comprises a user interface, called "HMI or Human Machine Interface." The HMI of the SCADA scheme is where information is processed and offered to be monitored and viewed by a human operative. This interface typically incorporates controls where individuals could interface with SCADA system.

HMIs are easy means to standardize the facilitation of viewing and monitoring numerous PLC's or RTU's. Usually PLC's or RTU's will run a pre-programmed procedure, but monitoring all of them individually could be hard, typically because they're spread out all over the scheme. Since PLC's and RTU's historically had no consistent method to show or present information to an operator. The SCADA system corresponds with PLCs all through the network system and processes details that are easily dispersed by the HMI.

SCADA Hardware and Software Components

SCADA systems are extremely advantageous means to monitor and run processes. They are truly great for small applications like control of climate or could be efficiently used in big applications such as controlling and monitoring a mass transit system or nuclear power plant.

SCADA could come in an non-proprietary and open protocols. Smaller schemes are exceptionally reasonable and could either be bought as a complete system or could be matched and mixed with particular components. Big systems could as well be made with off-the-shelf components. The SCADA scheme software could as well be simply configured for approximately any application, eliminating the necessity for intensive software or custom made development.

Article Source: http://EzineArticles.com/3215599

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