Operating method for a valve system, control unit and computer program product

A valve system comprising:

• a valve;
• a pneumatic actuation apparatus in which setting a differential pressure causes an armature of the valve to be moveable, a specifiable valve position being settable in a radial direction via the differential pressure as a sole input variable to save installation space of the valve system;
• and a controller;
• wherein the controller is configured to:
• a) provide the valve in an active operating state and specify a valve position to be approached;
• b) determine a target differential pressure corresponding to the valve position to be approached which is to be set in the pneumatic actuation apparatus;
• c) change a differential pressure present in the pneumatic actuation apparatus and detect the differential pressure present;
• and d) stabilize the differential pressure present when a deviation between the differential pressure present and the target differential pressure falls below a settable threshold value in terms of amount;
• wherein the valve position to be approached lies between two end positions of the moveable armature;
• and wherein the controller is further configured to initiate a self-calibration of the valve system such that the end positions are approached to determine a pressure-time characteristic.

A controller for actuating a moveable armature on a pneumatic actuation apparatus for a valve system, the controller being configured to receive measurement signals for a first and a second chamber pressure and to output control signals for setting at least one of the first and second chamber pressures, and wherein the controller is further configured to:

• a) provide a valve in an active operating state and specify a valve position to be approached;
• b) determine a target differential pressure corresponding to the valve position to be approached which is to be set in the pneumatic actuation apparatus;
• c) change a differential pressure present in the pneumatic actuation apparatus and detect the differential pressure present;
• and d) stabilize the differential pressure present when a deviation between the differential pressure present and the target differential pressure falls below a settable threshold value in terms of amount;
• wherein the valve position to be approached lies between two end positions of the moveable armature;
• and wherein the controller is configured to initiate a self-calibration of the valve system such that the end positions are approached to determine a pressure-time characteristic.