The IEC 62439 series of standards is applicable to high-availability automation networks based on the ISO/IEC 8802-3:2000 (Ethernet) technology.

This part of the IEC 62439 series specifies a redundancy protocol that is based on a ring topology, in which the redundancy protocol is executed at the end nodes, as opposed to being built into the switches. Each node detects link failure and link establishment using mediasensing technologies, and shares the link information with the other nodes, to guarantee fast connectivity recovery times. The nodes have equal RRP network management functions.

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PDF Pages	PDF Title
6	English CONTENTS
10	INTRODUCTION
11	1 Scope 2 Normative references 3 Terms, definitions, abbreviations, acronyms, and conventions 3.1 Terms and definitions
12	3.2 Abbreviations and acronyms 3.3 Conventions
13	4 RRP overview 4.1 General 4.2 Frame forwarding and receiving control Figures Figure 1 – Forwarding and receiving Ethernet frames
14	Figure 2 – Structures of ND and GWD
15	Figure 3 – LNM forwarding control Figure 4 – RNM forwarding control
16	4.3 Link status monitoring 4.4 Error detection 4.5 Plug and play 4.6 Network management information base (NMIB) management Figure 5 – Link status information
17	4.7 Network recovery 4.8 Automatic network configuration 4.9 RRP basic operating principle Figure 6 – A device operation in initialization phase
18	Figure 7 – Devices operation in line network establishing phase Figure 8 – Extension of line network operation
19	5 RRP redundancy behaviours 5.1 Network topology Figure 9 – Ring network establishment operation Figure 10 – Ring to line network change operation
20	5.2 Network recovery in ring network Figure 11 – Ring topology
21	Tables Table 1 – RRP network recovery parameter Table 2 – Parameters for calculation
23	Figure 12 – Link fault between neighbouring devices
24	Figure 13 – Link fault of remote device Figure 14 – Device fault on a RNM
25	5.3 Automatic Ring Network Manager (RNM) election procedure
26	5.4 Path management Figure 15 – Path management in a line topology network Table 3 – Path table of Device1 in a line topology network
27	Figure 16 – Path management in a ring topology network Table 4 – Path table of Device4 in a line topology network Table 5 – Path table of Device1 in a ring topology network
28	5.5 Device address collision Figure 17 – RRP device address collision in a ring network Table 6 – Path table of Device3 in a ring topology network
29	6 RRP class specification 6.1 General 6.2 Template Table 7 – Device address collision information
31	6.3 Attributes
36	7 RRP services specification 7.1 Set device information Table 8 – Parameters of set device information service
38	7.2 Get device information Table 9 – Parameters of get device information service
40	7.3 Get network information Table 10 – Parameters of get network information service
42	7.4 Get path table information Table 11 – Parameters of get path table information service
44	8 RRP protocol specification 8.1 General
45	8.2 Ethernet header 8.3 Encoding of RRP_FrameHDR Figure 18 – Common MAC frame format for RRP DLPDU Table 12 – RRP Length/Type field
46	Table 13 – Version Table 14 – DST_addr
47	Table 15 – SRC_addr Table 16 – Network control message type Table 17 – Type of service
48	Table 18 – Priority Table 19 – Validation of extension code
49	8.4 Encoding of data and pad Table 20 – Encoding of FamilyReq frame
50	Table 21 – Encoding of FamilyRes frame Table 22 – Encoding of MediaLinked frame
51	Table 23 – Encoding of AdvThis frame Table 24 – Encoding of LineStart frame
52	Table 25 – Encoding of RingStart frame
53	Table 26 – Encoding of AckRNMS frame
54	8.5 Frame Check Sequence (FCS) 9 RRP protocol machine 9.1 Protocol state machine description Table 27 – Encoding of CheckRNMS frame
56	9.2 Local parameters and variables for protocol state Table 28 – Variables to support device information management
57	Table 29 – Variables to support managing network information Table 30 – Variables to support device path information management Table 31 – Variables of Received RRP Frame
58	Table 32 – Local variables for protocol state Table 33 – Constants for protocol state
59	9.3 State transitions Table 34 – RRP State transitions
72	9.4 Function descriptions Table 35 – RRP Function descriptions
77	10 RRP Management Information Base (MIB)
83	Bibliography

Status	Definitive
Title	Industrial communication networks. High availability automation networks – Ring-based Redundancy Protocol (RRP)
Corrects	BS EN 62439-7:2012
Replaces	BS EN 62439:2008
Publisher	BSI
Committee	GEL/65/3
Pages	86
Publication Date	2015-07-31
ISBN	978 0 580 90610 7
Standard Number	BS EN 62439-7:2012
Identical National Standard Of	IEC 62439-7:2011/COR1:2015, EN 60061-3:1993/A43:2011, EN 62439-7:2011/Cor:2015
Descriptors	Data transmission, Local area networks, Process control, Automatic control systems, CSMA/CD networks, Computer networks, Industrial, Information exchange, Open systems interconnection, Communication networks
ICS Codes	35.100.05 - Multilayer applications


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BS EN 62439-7:2012:2015 Edition

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