Setpoint

A setpoint is the desired target value for a controlled process variable, such as a target temperature, pressure, flow rate, or speed. The control system continuously compares the measured value against the setpoint and adjusts an actuator to minimise the difference between them.

Setpoints can be fixed by an operator, scheduled over time, or driven dynamically by a higher-level control strategy such as cascade or model predictive control. The gap between the setpoint and the measured value is the error that drives controller action. Setpoints matter because they define exactly what the automation system is trying to achieve, translating production requirements and safety limits into concrete targets the control loops work to maintain.

Where this applies

Implementing chilled water supply temperature reset · Floating refrigeration head pressure · Balancing a chilled water distribution loop · Reducing and cascading steam pressure · Optimising desuperheater control · Adopting free cooling