The function of the integral (reset) mode is toans.Oppose change in measurementEliminate offsetStabilize the control loopAutomatically adjust the controller’s gain Previous Marked for Review Next

The function of the integral (reset) mode in a control system is to eliminate offset. This means it helps to bring the system's output back to the desired set point by accumulating past error values. This action continues until the error has been reduced to zero, thus eliminating any steady-state error or offset.

Here's a step-by-step explanation:

1. The integral action considers past errors over a period of time. It integrates these error values to produce a change in the output.

2. If there is a persistent, steady-state error, the integral action will keep increasing (or decreasing) the controller output until the error is driven to zero.

3. This means that even small errors that exist for a long time (offsets) will cause the integral action to change the controller output. This will continue until the process variable has reached the set point and the error is zero.

4. Therefore, the integral action helps to eliminate any offset, ensuring that the process variable equals the set point in steady state.

5. The integral action also helps to stabilize the control loop by continuously adjusting the controller output based on the accumulated error. However, it does not automatically adjust the controller's gain. The gain is a separate parameter that needs to be set based on the dynamics of the process.