Title:
METHOD AND BUS SYSTEM FOR AUTOMATIC ADDRESS ALLOCATION
Document Type and Number:
WIPO Patent Application WO1999008164
Kind Code:
A3
Abstract:
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.
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Inventors:
LORENZ JOACHIM (DE)
WEBER KARL (DE)
WEBER KARL (DE)
Application Number:
PCT/DE1998/002076
Publication Date:
April 29, 1999
Filing Date:
July 23, 1998
Export Citation:
Assignee:
SIEMENS AG (DE)
LORENZ JOACHIM (DE)
WEBER KARL (DE)
LORENZ JOACHIM (DE)
WEBER KARL (DE)
International Classes:
H04L12/403; H04L29/12; (IPC1-7): H04L12/403; H04L29/12
Foreign References:
| JPH0837538A | 1996-02-06 | |||
| EP0173905A2 | 1986-03-12 | |||
| DE3736081A1 | 1989-05-03 | |||
| DE4428502A1 | 1996-02-15 |
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