The basic SCADA architecture begins with PLC (programmable logic controllers) and their remote terminal units (RTUs). PLCs are the local intelligence for factory machines were communicate with an array of objects such as , HMIs, sensors, and end devices, and then route the information from those objects to computers with SCADA software. The SCADA software processes, distributes, and displays the data, helping operators and other employees analyze the data and make important decisions.
Virtually anywhere you look in today’s world, there is some type of SCADA system running behind the scenes: achieving quality standards at a waste water treatment plant, ensuring production and safety at a refinery, or even tracking your energy use at home, to give a few examples.