A new approach for increasing the performance of the industrial Ethernet system PROFINET

A Hardware Independent Real-time Ethernet for Motion Control Systems

“…In this manner, all the nodes can be updated in a single communication cycle. This is more efficient than the other RT Ethernets employing individual frame(see [8], [11]). In addition, the control and state data are separated in the descending and ascending ways, so bandwidth of Ethernet can be used more efficiently.…”

“…Line topology network is widely used in industrial automation field for its simple structure, low cost and advantage in deterministic communication(see [11], [15]- [16]Jasperneite A Proposal for a Generic Real-TimeJasperneite A Proposal for a Generic Real-TimeJasperneite A Proposal for a Generic Real-Time). EtherMAC also takes the line topology as its fundamental topology, where the IPC with at least one standard NIC works as the master node, and the FPGA-based slave nodes with two Ethernet ports cascade with each other in a line as shown in Figure 1.…”

A novel method for auto configuration of Realtime Ethernet Networks

“…With locally administered MAC addresses as defined in [18] the network topology can be used directly to address single devices.…”

“…Exploiting two bits for the branch decision, the addressing of up to three different branch ports is possible for building complex network structures. The destination level can always be identified by the vector '00' and defines also the last relevant address byte [18].…”

“…The secondary port will forward frames to the end of a line. The branch port interconnects the subordinated lines as shown in [18].…”