Method for automatic address assignment, bus system for automatic address assignment and communication participants that can be used in the bus system or in the context of the method

摘要

The invention relates to a method for automatic address allocation, said method being based on distance measurement. According to the invention, a master (M) transmits a preamble (P) via the bus. Said preamble is received by all slaves that are to be addressed. The slaves react to the preamble (P) by transmitting a sequence of response signals (A). A slave (S2) located in the direction of the master (M) upstream from a slave (S3) transmitting a sequence of response signals (A) records the sequence of response signals (A) from the transmitting slave (S3) and waits for a new preamble (P). The slave (Sz) which does not record any sequences of response signals (A) from other slaves is the last slave when seen from the master (M) without an address allocation on the bus. Said slave (Sz) becomes available to receive a telegram (T) from the master(M) giving it a name. During the next cycle of the method the slave (Sz) which has recently been given a name no longer reacts to the preamble (P) enabling another slave which evaluates the bus constellation to become available for reception of the telegram giving it a name. In this way all slaves without an address are gradually given a name.