Overview of SCADA (Supervisory Control and Data Acquisition)
A centralized, computer monitoring and controlling system that is utilized for plant sites which are located at a long distance is referred to as SCADA system. Because of its unique software application, which is managing any type of equipment by automation, companies with complex operations processes, like water and waste control, energy, oil and gas refining, transportation, telecommunications industries, employ the SCADA system to automate their operations, detect and correct problems, at the same time, and measure trends over time. In order for the SCADA system meet its objective of monitoring and controlling a company’s operating process, the system first collects data and analyze them.
The following are the main function components of the SCADA system: data acquisition, network data communication, data presentation, and control. The SCADA system is made up of the following: sensors and control relays, Remote Telemetry Units (RTUs), master units, and a communication network, which consists of input/output signal hardware, networks, Human-machine Interface (HMI), controllers, communication, database, and software, for it to perform its functions.
There are two types of devices which are utilized by the SCADA system to perform its controlling function and these devices are RTUs or Programmable Logic Controllers (PLCs). Between these two devices, it is the RTUs which has a more advanced functionality feature allowing for a more efficient and secure monitoring system.
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It is called Human-Machine Interface because it partners with a human operator by serving as a master station that communicates the processed status and information collected along the SCADA system to the human operator. Since all pieces of data taken from the entire complex unit are collected by the HMI, operators can easily view the system alarms and information through the HMI and through that …