Industrial communication networks - High availability automation networks - Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR)

1.1 General The IEC 62439 series is applicable to high-availability automation networks based on the Ethernet technology. This document: - specifies PRP and HSR as two related redundancy protocols designed to provide seamless recovery in case of single failure of an inter-bridge link or bridge in the network, which are based on the same scheme: parallel transmission of duplicated information; - specifies the operation of the precision time protocol (PTP) in networks that implement the two redundancy protocols (Annex A); - specifies PTP profiles with performance suitable for power utilty automation (Annex B) and industrial automation (Annex C); - includes for better understanding a tutorial (Annex D) on the PTP features effectively used in high-availability automation networks; - includes a management information base for PTP (Annex E); - defines a conformance test suite for the above protocols (Annex F). 1.2 Code component distribution This document is associated with Code components. Each Code Component is a ZIP package containing at least the electronic representation of the Code Component itself and a file describing the content of the package (IECManifest.xml).