A door operator and a method for moving a door leaf between a closed and open position utilize a drive unit, a control unit, and a supervise unit. The drive unit is connected to and moves the door leaf between the open and closed position. The control unit is connected to and controls the movement of the drive unit. The supervise unit includes a status management unit and one or more sensors that provide sensor data associated with an operation of the door leaf. The status management unit receives the sensor data from the one or more sensors, determines a status pattern from a plurality of status patterns of the operation of the door leaf at least based on the sensor data, with a first status pattern being associated with a status event, and triggers the status event in response to the first status pattern.