Patent ID: 7428250

Claim:
A method for receiving data telegrams, which are identified by identifiers, in an isochronous real-time fast Ethernet data network for real-time communication, wherein a node has at least a first receive port and a second receive port, and wherein the data network has at least one redundant network path, the method comprising: at the first receive port, receiving a first data telegram at a first timer value, wherein the first data telegram has an identifier; in a memory of the node, storing user data of the first data telegram in an address space that is assigned to the identifier; storing the first timer value; at the second receive port, receiving a second data telegram at a second timer value, wherein the second data telegram has the identifier of the first data telegram; and if the first timer value and the second timer value are not identical, overwriting the address space and the stored first timer value of the first data telegram with user data of the second data telegram and with the second timer value of the second data telegram; wherein a respective one of the first and second timer values, at which a respective one of the first and second data telegrams is received, corresponds to a cycle number of an isochronous cycle during which the respective one of the first and second data telegrams is received.