Scada SystemsSupervisory Control and Information Acquisition (SCADA) systems that gather and handle data across a massive facility from a central computer system, play a key part in the utility sector, helping to handle large and diverse data loads from power plants of all types. Interconnectivity has produced these systems increasingly vulnerable to cyber attacks.

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Program memory or ROM stores system guidelines. Analog devices normally call for 25 words of memory per device. Examples of analog devices are voltage, current, and temperature meters or sensors. Uncomplicated and sequential applications normally require five words of memory per I/ device. Complex applications are not as predictable and want more plan memory space.

Sensors and manage relays are incredibly uncomplicated electric devices that cannot create or interpret protocol communication on their own. Therefore the remote telemetry unit (RTU) is necessary to provide an interface between the sensors and the network. The RTU (Remote Telemetry Unit) encodes sensor inputs into protocol format and forwards them to the SCADA master in turn, the RTU (Remote Telemetry Unit) receives handle commands in protocol format from the master and transmits electrical signals to the appropriate handle relays.