Functionality; Operation Principle - ABB REL650 Technical Manual

Section 16
Ethernet
16.3.2
16.3.3
660

Functionality

PRP IEC 62439-3 redundant communication
Redundant communication according to IEC 62439-3 PRP-0 and IEC 62439-3
PRP-1 parallel redundancy protocol (PRP) is available as an option when ordering
IEDs. PRP according to IEC 62439-3 uses two optical Ethernet ports.
IEC 62439-3 High-availabillity Seamless Redundancy (HSR)
Redundant station bus communication according to IEC 62439-3 Edition 1 and
IEC 62439-3 Edition 2 High-availability seamless redundancy (HSR) is available
as an option when ordering IEDs. Redundant station bus communication according
to 62439-3 uses two optical Ethernet ports.

Operation principle

PRP IEC 62439-3 redundant communication
The communication is performed in parallel, that is the same data package is
transmitted on both channels simultaneously. The received package identity from
one channel is compared with data package identity from the other channel, if they
are the same, the last package is discarded.
The RCHLCCH function block supervise the redundant communication on the two
channels. If no data package has been received on one (or both) channels within the
last 10 s, the output LinkAUp and/or LinkBUp is set to 0 which indicates an error.
1MRK 506 382-UEN A
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GUID-73DB23CD-A924-4B89-8AAB-1E79D44DE429 v1
Line distance protection REL650 2.2 IEC
Technical manual