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SoC-e Technologies
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Parallel Redundancy Protocol (PRP)
Parallel Redundancy Protocol (PRP, IEC 62439-3-Clause
4) redundancy is implemented in the nodes rather than
in the network. Especially adapted nodes (Dual Attached
Nodes- DANs), are connected to two independent Ethernet
networks (LAN A and LAN B), and send the same frames
over both networks.
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High-availability Seamless Redundancy (HSR)
High-availability Seamless Redundancy (HSR, IEC
62439-3-Clause 5) provides redundancy by sending
packets in both directions through a ring network. A
simple HSR network consists of Doubly Attached Bridging
Nodes, each having two Ethernet ports. A HSR node sends
the same frame over both ports.
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Time Sensitive Networking (TSN)
TSN stands for Time Sensitive Networking.
It is the name of the IEEE 802.1 Task Group responsible
for standards at Data Link Layer. This group provides
the specifications that will allow time-synchronized,
low latency, streaming services through IEEE 802
networks. TSN is unique in that its streams are
delivered with guaranteed bandwidth and deterministic
latency.
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IEEE 1588-2008 PTPv2
IEEE 1588-2008, also known PTPv2, offers high
accuracy clock synchronization for interconnected
systems. There are many sectors that benefit from this
protocol, like finance, aerospace and industry. A
representative IEEE 1588-2008 case-of-use is
the adoption of this protocol as synchronization
mechanism in the standard for Substation Automation (IEC
61850).
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Rapid Spanning Tree Protocol (RSTP)
It is a network protocol that ensures a
loop-free topology for Ethernet networks. Nowadays it
is a popular solution to implement redundant networks
in critical systems for Energy, Aerospace or Factory
Automation. This protocol is incorporated into IEEE
802.1Q-2014. RSTP provides faster convergence than
802.1D STP when topology changes occur.
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Media Redundancy Protocol (MRP)
Media Redundancy Protocol (MRP) is a data
network protocol standardized by the International
Electro technical Commission as IEC 62439-2. MRP allows
rings of Ethernet switches to overcome any single
failure with recovery time much faster than achievable
with traditional alternatives like Spanning Tree
Protocol. However, it is not able to offer zero-delay
recovery time like PRP or HSR.
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IRIG-B - 200-04
The term IRIG signals is used to refer to a whole group of serial time
codes, which use a continuous stream of binary data to transmit information on
date and time. The individual time code formats can be distinguished by the signal
characteristics.
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Device Level Ring (DLR)
Device Level Ring (DLR) is a Layer 2 protocol that provides media redundancy in a
ring topology. The DLR protocol is intended primarily for
implementation in CP 2/2 end devices that have multiple Ethernet ports and
embedded switch technology. The DLR protocol provides for fast network fault
detection and reconfiguration in order to support the most demanding control
applications. |
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SMV - IEC 61850-9-2
The Sampled Measured Value (SMV or SV) Process Bus concept that was introduced by
the IEC 61850-9-2 standard. This standard proposes that the Current and Voltage
Transformer (CT, PT) outputs and other signals are digitized at the source and
then communicated to those devices using an Ethernet-Based Local Area Network
(LAN). |
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