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BS EN 62439-3:2012

BS EN 62439-3:2012

$198.66

Industrial communication networks. High availability automation networks – Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR)

Published By Publication Date Number of Pages
BSI 2012 62
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IEC 62439-3:2012 specifies two 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: duplication of the LAN, resp. duplication of the transmitted information. This second edition cancels and replaces the first edition published in 2010. It constitutes a technical revision. The main changes with respect to the previous edition are: – specification of the interconnection of PRP and HSR networks; – introduction of a suffix for PRP frames; – clarification and modification of specifications to ensure interoperability; – slackening of the specifications to allow different implementations; – consideration of clock synchronization according to IEC 61588; – introduction of test modes to simplify testing and maintenance. This publication is to be read in conjunction with /2.

PDF Catalog

PDF Pages PDF Title
6 CONTENTS
9 INTRODUCTION
10 1 Scope
2 Normative references
3 Terms, definitions, abbreviations, acronyms, and conventions
3.1 Terms and definitions
11 3.2 Abbreviations and acronyms
3.3 Conventions
4 Parallel Redundancy Protocol (PRP)
4.1 PRP principle of operation
12 Figures
Figure 1 – PRP example of general redundant network
13 Figure 2 – PRP example of redundant network as two LANs (bus topology)
Figure 3 – PRP example of redundant ring with SANs and DANPs
Figure 4 – PRP with two DANPs communicating
15 Figure 5 – PRP RedBox, transition from single to double LAN
17 Figure 6 – PRP frame extended by an RCT
Figure 7 – PRP VLAN-tagged frame extended by an RCT
18 Figure 8 – PRP constructed, padded frame closed by an RCT
19 Figure 9 – PRP drop window on LAN_A
Figure 10 – PRP drop window reduction after a discard
20 Figure 11 – PRP frame from LAN_B was not discarded
Figure 12 – PRP synchronized LANs
21 4.2 PRP protocol specifications
27 Tables
Table 1 – PRP_Supervision frame with VLAN tag
29 4.3 PRP service specification
Table 2 – PRP constants
30 Table 3 – PRP arguments
31 Table 4 – PRP arguments
Table 5 – PRP write
32 5 High-availability Seamless Redundancy (HSR)
5.1 HSR objectives
5.2 HSR principle of operation
Table 6 – PRP read
34 Figure 13 – HSR example of ring configuration for multicast traffic
35 Figure 14 – HSR example of ring configuration for unicast traffic
36 Figure 15 –HSR structure of a DANH
37 Figure 16 – HSR example of topology using two independent networks
38 Figure 17 – HSR example of peer coupling of two rings
39 Figure 18 – HSR example of connected rings
40 Figure 19 – HSR example of coupling two redundant PRP LANs to a ring
41 Figure 20 – HSR example of coupling from a ring node to redundant PRP LANs
42 Figure 21 – HSR example of meshed topology
43 Figure 22 – HSR structure of a RedBox
44 5.3 HSR node specifications
46 5.4 HSR RedBox specifications
49 5.5 QuadBox specification
5.6 Association definition
5.7 Frame format for HSR
50 Figure 23 – HSR frame without VLAN tag
Figure 24 – HSR frame with VLAN tag
51 Table 7 – HSR_Supervision frame with optional VLAN tag
52 Table 8 – HSR Constants
53 6 Protocol Implementation Conformance Statement (PICS)
7 PRP/HSR Management Information Base (MIB)
57 Annex A (informative) PRP duplicate discard algorithm as pseudo-code
60 Bibliography

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BS EN 62439-3:2012
$198.66