The present invention relates to a central unit of a bus system (10), to a bus system (10) and to a method for locating bus subscribers (2) in the bus system. The central unit (1) stores a generated address list containing the addresses of the bus subscribers (2). In a commissioning mode, a control unit (3) transmits control commands to the bus subscribers (2) according to the address list. A bus subscriber (2) is preferably a luminous means or has at least one luminous display. The sequential control commands are preferably such that, at any time, a selected bus subscriber (2) assumes a first luminous state which differs from a second luminous state of all other bus subscribers (2).