In a controller with proportional and reset control, where does the reset control unit send a signal until balance is achieved?

In a controller that utilizes both proportional and reset control, the reset control unit plays a crucial role in maintaining the desired setpoint by compensating for any offset that may occur in the system. The reset control is responsible for adjusting the control output based on the difference between the desired setpoint and the actual process variable, which is continuously monitored.

When an imbalance is detected, the reset control unit sends a signal to the unbalanced detector. This component is critical because it identifies deviations from the desired setpoint and informs the control system that corrective actions are needed. By sending signals to the unbalanced detector, the reset control can incrementally adjust the control output until the system achieves equilibrium, effectively eliminating any sustained offsets.

This continuous feedback loop is essential for maintaining system stability and precision in controlled processes, making the reset control unit integral in achieving balance between the setpoint and the actual conditions.