Tuesday, November 22, 2016

The Concept and Elements of Scada Control and Supervision System to monitor and control the entire site and complex systems distributed over large areas




Scada Control and Supervision systems are used to monitor and control of plant or equipment in industries such as telecommunications, water, waste control, energy, oil and gas and transportation. SCADA collects information system, such as happened to a leak in a pipeline, transferring information to a central site, alerting the home station that the leak occurred, to analyze the required control, etc.

SCADA systems can be relatively simple, such as monitor the environmental conditions of a small office building or very complex systems, such as a system to monitor all activity in the nuclear power plant or water device activity in the city.

Scada Control and Supervision


Element of Scada Control and Supervision Monitoring as unique solution to meet all these demands SCADA system.

It is impossible to maintain Scada Control and Supervision of all industrial activities manually. Some mechanism necessary for the control and monitoring, data collection, data analysis and reporting tools generate. It presented a unique solution to meet all these demands SCADA system.

The SCADA system usually refers to the coordinate system, but does not control the process in real time, but the DCS to do so. SCADA systems consist of several SCADA elements as below:

1. interaction between human and machine (HMI)
This is the interface that provides a process for the human operator data, and through this, and human operators monitor and control the process.

2. Supervisor (computer) system
It collects data about the process and send commands (or control) of the process.

3. Unit peripheral remote (RTU)
Connected to the sensor in the process, converting sensor signals into digital data and send digital data monitoring system.

4. Programmable Logic Controller (PLC)
They are used as organs area because it is more economical, versatile, flexible, and can be configured from the RTU private purposes.

5. Telecommunications Infrastructure
It provides connectivity with the control system and remote terminal unit.


Concepts of Scada Control and Supervision System

Central SCADA-range systems refers to monitor and control the entire site, or complex systems distributed over large areas (between industrial plants and country). This is performed more than control the work automatically by the unit and remote terminal (RTU) or a programmable logic control (PLC).

Host control to enter the primary or basic functions of supervision is usually limited. For example, it is permissible for the PLC to control the cooling water flow through the part of the industrial process. But the system SCADA allows the operator to change the set points for the flow. Moreover, it also allows alarm conditions, for example the loss of high and flow temperature that will be recorded and displayed.

SCADA already applies to the lowest level of automation. For example, the data collected by the sensors and measuring tools, asks settings. There are higher than this level, allows the system SCADA monitoring a predetermined value, and the inclusion of values and a set of other control interventions.


Conclusion

SCADA stands for supervisory control and data acquisition. This is an industrial control system based on computer applied in process control system. In this practically, it was supported by Distributed Control System (DCS). There is usually a mix up between the two concepts to monitor and control the entire site and complex systems distributed over large areas


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