Isochronous RT of Industrial Switches
Several industrial Ethernet-based protocols — namely PROFINET IRT (Isochronous Real-Time, also referred to as PROFINET Conformance Class C), SERCOS III, and Ethernet POWERLINK — achieve hard real-time communication by using the principles of isochronous data transmission. It enables seamless integration of industrial networks by connecting different field. It ensures precisely reproducible and defined process response times as well as equidistant and synchronous signal processing. PROFINET employs its first two communication channels: TCP/IP and UDP/IP, and Real-Time (RT) for most data exchange. Unless there's abnormally high bandwidth utilization, Ethernet is built on the assumption that nodes will probably not transmit at the same time.
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