Patent Document ID: 9152134
Application ID: 13646234
Patent Flag: 1

Claim One:
1. A closed-loop control device for a process, comprising: a linear dynamic controller; a dead band element connected upstream of the linear dynamic controller to reduce actuating interventions during steady state control; and an open-loop control device configured to automatically deactivate the dead band element if a control deviation of a control loop exceeds a predefined or predefinable first threshold value, a control deviation passed via the dead band element being uninfluenced by a set dead band in a deactivated state, and configured to automatically reactivate the dead band element if the control deviation undershoots a predefined or predefinable second threshold value which is less than the first threshold value; wherein at least one of: (i) a period after which the dead band element is reactivateable when the second threshold value is exceeded being predetermined based on a time window set in a monitoring module and is characteristic of a duration of stabilization processes; and (ii) a mean value of a manipulated variable last output in a time window in an inactive state of the dead band element corresponding to the mean value of the manipulated variable calculated in the monitoring module.