Patent ID: 7702834

Claim:
Method for transmitting data on a serial bus between at least one active station and at least one passive station, the data being transmitted in the form of circulating telegrams between the active station and the passive station, the method comprising the steps of: providing one or more circulating telegrams flowing in a circular path formed by the serial bus, with each circulating telegram starting at an active station, sequentially moving from the active station to the passive station on the serial bus and, after sequentially passing through the passive station on the serial bus, returning to the active station from which it originated, each of the circulating telegrams being outputted onto the serial bus by the active station and containing a logical address and a data portion; providing an assignment table in the passive station, the assignment table containing logical addresses of the circulating telegrams, the logical addresses being correlated with physical addresses of data-storage areas of the passive station; and while the circulating telegram is passing through the passive stations, comparing the logical address of each circulating telegram with the logical addresses stored in the assignment table of the passive station, and if there is a match, performing a data exchange between the data portion of the circulating telegram and the data-storage area of the passive station, which has the physical address assigned to the logical address.