Abstract: A method for commissioning an actuator (1), includes querying and inputting operating parameters of the actuator (1) one after the other in an interactive menu structure, with at least one path which determines the operating parameters to be queried one after the other being defined in the menu structure, and an acknowledgement of a parameter input causing a jump along the defined path to the next parameter input, in particular wherein the path connects a plurality of branches of the menu structure.

Abstract: The invention relates to a display unit which is designed to display a current actuating position of an actuating drive coupled to a valve of a fitting by means of a variable graphical element, wherein the graphical element is shown rotated by a corresponding rotation angle in reaction to a sensor with which the current actuation position is determined.

Abstract: A fail-safe drive (1) for an actuating drive is provided, which has a cam disc (8), at least one restoring element, a counter-element (5) and an output shaft (3), with the cam disc (8) and the counter-element (5) being configured for joint conversion of an axial movement of the restoring element along the output shaft (3) into a rotational movement of the output shaft (3). The cam disc (8) has a control cam (10), the profile of which is adapted to a spring characteristic curve of the restoring element such that, in the case of activation of the failsafe drive (1), a constant output movement and/or a constant output torque can be generated.

Abstract: An actuator (1) having an energy accumulator (6), with which an emergency drive (5) can be supplied, is configured to be tensioned by an electric motor (2). The motor (2) displaces at least one engaging element (41, 42) of the energy accumulator (6), on which a restoring force of the energy accumulator (6) acts, along an actuating travel in normal operating mode.