METHOD AND CONTROL MECHANISM FOR CONTROLLING A DRIVE DEVICE FOR A CLOSING DEVICE OF A BUILDING OR AN ENCLOSED AREA

摘要

The invention relates to a method for controlling a drive device (4) which is connected to a gate (2, 3), a door, a window or any other closing device which can be moved between an opening position and a closing position of a building (1) or an enclosure, in order to drive said closing device. The inventive method comprises the following steps: establishing a threshold value (Pmax + DELTA P) for at least one operating parameter (P, I) of the drive device (4) which is dependent on the driving force (F) required for opening or closing the closing device (2) and which is especially directly or inversely proportional to said driving force (F), at least within a range, such as preferably, the power consumption (P), the motor current (I), the motor speed and/or the motor supply voltage of a drive motor (7) of the drive device (4), said threshold value being established during a learning operation in such a way that the operating parameter (P, I) exceeding the established threshold value (Pmax + DELTA P) or falling below the established threshold value indicates an inadmissible increase in the driving force (F); monitoring the at least one operating parameter (P, I) during the operation of the drive device (4); and shutting down or reversing the drive device (4) if an inadmissible increase in the driving force (F) is indicated by the operating parameter (P, I) or one of several operating parameters (P, I) exceeding or falling below the corresponding established threshold value (Pmax + DELTA P). In order to integrate an emergency shutdown system in a reliable and simple manner using shutdown criteria which are independent of the path, the step in which the threshold value (Pmax + DELTA P) is established comprises the determination of a local extreme value (Pmax) of the at least one operating parameter (P, I) through the determination of an increase of the operating parameter (P, I) following a decrease or a lowest value or of a decrease of the operating parameter following an increase or a highest value (Pmax). The invention also relates to a control device for carrying out this method.