The fieldbus data structure is applied to Layers 5, 6, and 7 of the OSI reference model over Ethernet, IP, and TCP/UDP in the transport layer (Layer 4). Most controllers (with appropriate network connections) can transfer data from one network type to the other, leveraging existing installations, yet taking advantage of Ethernet. For example, Common Industrial Protocol (CIP) has implementations based upon Ethernet and the IP protocol suite (EtherNet/IP), DeviceNet, and ControlNet (among others). Using IEEE standards-based equipment, organizations can migrate all or part of their factory operations to an Ethernet environment at the pace they wish. Speed at 10Gbps Industrial Ethernet applies the Ethernet standards developed for data communication to manufacturing control networks (Figure 3.1). 10 Gigabit Ethernet, ratified as a standard in June 2002, is an even faster version of Ethernet.Gigabit Ethernet : increasing speed tenfold over Fast Ethernet to 1000 Mbps or 1Gbps.Fast Ethernet delivers a speed increase of 10 times the 10BASE-T Ethernet specification (100 Mbps) while retaining many of Ethernet’s technical specifications.10BASE-T Ethernet delivers performance of up to 10 Mbps over twisted-pair copper cable.
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