SCADA Tutorial Part 2 - How SCADA Systems Work?

SCADA Tutorial Part 2 - How SCADA Systems Work?: "The simplest possible SCADA system would be a single circuit that notifies you of one event. Imagine a fabrication machine that produces widgets. Every time the machine finishes a widget, it activates a switch. The switch turns on a light on a panel, which tells a human operator that a widget has been completed."