Method for initialising a bus system, and bus system

A method for initializing a bus system that includes a master module and bus subscribers arranged in series, the method comprising: asking the bus subscribers, by the master module, to log in to the master module; after the asking, logging in to the master module by a first bus subscriber downstream from the master module; after the logging in, waiting, by the first bus subscriber, for a predefined period of time to ascertain whether a second bus subscriber downstream from the first bus subscriber logs in to the master module; after the waiting, (a) closing the bus system, by the first bus subscriber, if no second bus subscriber logs in to the master module within the predefined period of time, or (b) logging in to the master module by a second bus subscriber within the predefined period of time and waiting for a further predefined period of time to ascertain whether a third bus subscriber downstream from the second bus subscriber logs in to the master module, the second bus subscriber closing the bus system if no third bus subscriber logs in to the master module within the further predefined period of time. co co cn Fig.I1