Bus arrangement and method for operating a bus arrangement

A bus arrangement, comprising:

• a coordinator having a coordinator address;
• a first subscriber having a first subscriber address;
• and
• a bus, which couples the coordinator to the first subscriber,
• wherein the first subscriber is configured to receive an information message from the coordinator in a configuration phase, to extract the coordinator address from the information message, and to establish and store a safety address as a function of the first subscriber address and the coordinator address
• wherein the first subscriber comprises a first non-volatile permanent memory in which a first serial number is stored, and
• wherein the coordinator is configured to connect to the first subscriber in the configuration phase, to query the first serial number, and to store the first serial number in a non-volatile semi-permanent memory of the coordinator,
• wherein the bus arrangement comprises a second subscriber with a second serial number,
• wherein the bus couples the coordinator to the first subscriber and the second subscriber, and
• wherein the coordinator is configured to connect to the second subscriber in the configuration phase, to query the second serial number, to store the second serial number in the non-volatile semi-permanent memory, to compare the first serial number stored in the non-volatile semi-permanent memory with the second serial number stored in the non-volatile semi-permanent memory, and to provide a signal if the first serial number is identical to the second serial number.

A method for operating a bus arrangement, the method comprising:

• receiving, by a first subscriber, an information message sent by a coordinator;
• extracting a coordinator address of the coordinator from the information message in a configuration phase;
• and
• establishing and storing a safety address, by the first subscriber, as a function of a first subscriber address of the first subscriber and the coordinator address in the configuration phase,
• wherein a bus couples the coordinator to the first subscriber, and
• wherein the method further comprises the first subscriber determining the safety address in that:
• the first subscriber multiplies the coordinator address by a prespecified value M to determine a first product, and adds the first subscriber address to the first product, or
• the first subscriber multiplies the first subscriber address by a prespecified value N to determine a second product, and adds the coordinator address to the second product.