SCADA allows operators to adjust actions of the controller by adjusting the ______.

• A. Alarm thresholds
• B. Operating mode
• C. Set points
• D. Firmware updates

Answer: (C)

SCADA control relies on a target value called the setpoint. The controller constantly compares the actual process variable to that setpoint and sends commands to actuators to reduce the difference. When you adjust the setpoint, you change the target the controller strives to reach, which in turn changes the actions it takes—like adjusting heater output, valve position, or pump speed—to move the process toward the new target. Alarm thresholds are for triggering alerts when variables go out of range, not for directing how the controller acts. Operating mode (auto or manual) affects whether the controller governs the process, but the actual target value comes from the setpoint. Firmware updates modify software, not the real-time control actions.