PLCs are used with a variety of automated control systems that include the better-known SCADA system (Supervisory Control and Data Acquisition) as well as distributed control systems and others that keep the generators, turbines, and boilers at power plants running smoothly.2 The systems also control the pumps that transmit raw sewage to treatment plants and prevent water reservoirs from overflowing, and they open and close the valves in gas pipelines to prevent pressure buildups that can cause deadly ruptures and explosions, such as the one that killed eight people and destroyed thirty-eight
...more
