IEC 62439-3 PDF

System BOM savings from eliminating ASICs or FPGAs used for industrial Ethernet. Saves power, size, cost. • Software-based solution: Supports multiple real-. PRP and HSR Version 1 (IEC Ed.2),. Improvements and a Prototype Implementation. J.A. Araujo, J. Lázaro, A. Astarloa, A. Zuloaga. Department of. The IEC Industrial communication networks – High availability automation networks – Part 3: Parallel Redundancy Protocol (PRP) and High- availabilit.

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This page was last edited on 12 Marchat It has been adopted for substation automation in the framework of IEC Cost impact is ie since it makes little difference if the spares lie on the shelf or are actually working in the plant.

By using this site, you agree to the Terms of Use and Privacy Policy. To this purpose, each frame has an HSR tag that allows recognition of whether the frame should be forwarded or not, to avoid store-and-forward.

662439-3 with single attachment can be attached to one network only. A slave will normally listen to one port and supervise the other, rather than switching back and forth or using both Syncs.

They have been adopted for substation automation in the framework of IEC This means that corrupted frames will not be removed from the ring until they reach a node that already sent them. This cost is compensated because no Ethernet switches are required.


Since the forwarding delay of every node in a HSR ring adds to the total network latency, frames are forwarded within microseconds.

High-availability Seamless Redundancy – Wikipedia

HSR is typically used in a ring topology or in another mesh topology. Retrieved from 624399-3 https: Networking standards Industrial Ethernet. To simplify the detection of duplicates, the frames are identified by their source address and a sequence number that is incremented for each frame sent according to the PRP protocol.

PRP nodes have two ports and are attached to two separated networks of similar topology. Languages Deutsch Edit links. The cost of PRP is a duplication of all network elements that require it.

Every HSR node is a switching node, i. This is allowed since the two LANs have no connection. To reduce traffic, a node may refrain from sending a frame that it already received from the opposite direction on the same port Mode X[5] but this does not apply to all frames.

High-availability Seamless Redundancy

The sequence number, the frame size and the path identifier are appended in a 6-octet HSR tag header. Networking standards Network protocols.

The original standard IEC 624393- The two LANs have no links connecting them and are assumed to be fail-independent, to avoid common mode failures. Ethernet family of local area network technologies. Hardware support is anyhow needed when the node supports clock synchronization or security. Parallel Redundancy Protocol PRP is a network protocol standard for Ethernet that provides seamless failover against failure of any network component.


The two Ethernet interfaces of a node use the same MAC address.

IEC redundancy protocol testing – DNV GL

By using this site, you agree to the Terms of Use and Privacy Policy. Zurich University of Applied Sciences. PRP provides zero-time recovery and allows to check the redundancy continuously to detect lurking failures.

This page was last edited on 11 Novemberat A slave receives the two Sync messages at different times and applies the Jec Master Clock Algorithm BMCAand when the iex Sync come from the same grandmaster, the clock quality is used as a tie-breaker. Such frames can only be retired by the node that originally inserted them, or by another node that already sent them. The maintenance interval is shortened since ieec components can fail in use, but such outage will remain invisible to the application.

The destination node accepts the first frame of a pair and discards the second if it arrives. PRP and HSR are suited for applications that request high availability and short switchover time, [2] such as: