ABB RED650 Technical Manual page 635

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1MRK 505 394-UEN A

Line differential protection RED650 2.2 IEC

Technical manual

IEC09000758 V4 EN-US

Redundant station bus

IEC 62439-3 High-availabillity Seamless Redundancy (HSR)

HSR applies the principle of parallel operation to a single ring.

For each message sent, the node sends two frames, one through each port. Both the

frames circulate in opposite directions over the ring. Every node forwards the

frames it receives from one port to another to reach the next node. When the

originating sender node receives the frame it sent, the sender node discards the

frame to avoid loops

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.

If IEEE1588 (PTP) is used an accuracy of 1 µs can be guaranteed for up to 15

devices in one HSR-ring.

IEC09000758-4-en.vsd

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Relion 650 series