Abstract: A method for depicting data on the display of a modular display unit is provided. The data to be depicted comprises safety-critical data portions and non-safety-critical data portions data stream and depicted on the display via a graphical to the invention, a safety component of the display unit generates the safety-critical data portions based on safety-critical signals which are supplied to the display unit, while a background component of the display unit generates the non-safety-critical data portions in the form of a background screen. The safety-critical data portions are put on the display over said background screen in that a multiplexer converts the graphical data stream for display between the safety component and the background component, wherein, the specific regions, graphical content of the background screen changes and safety-critical graphical content is introduced and depicted on the display.

Abstract: The invention relates to an airworthy CAN bus system having a plurality of subscribers which are networked to one another by a CAN bus having dual redundancy and are able to interchange data, wherein a bus master polls the other bus subscribers at regular intervals and supplies them with data, and the bus master and all the other bus subscribers are of two-channel design, with each channel independently delivering data and at the same time being able to concomitantly read the data from the respective other channel.