A device for examining a conveyor system having one or more motorized rollers comprises a measuring unit for determining a current profile of the motorized roller, wherein the measuring unit has a first interface and a second interface which are adapted to switch the measuring unit in the conveyor system between the motorized roller and a control unit controlling the motorized roller. A third interface is provided for receiving data on an operating situation present during the determination of the current profile. An evaluation unit is adapted to compare the determined current profile of the motorized roller with a reference profile which is characteristic for the operating situation.