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RAPIEnet 
Summary
| RAPIEnet | |
|---|---|
| |
| Protocol Information | |
| Type of Network | Open Real-time Ethernet |
| Physical Layer | IEEE 802.3, Ethertype 0x88fe |
| Network Topology | Ring or Line topology |
| Device Addressing | DIP switch or hardware/software |
| Network Configuration | Automatically done by protocol |
RAPIEnet (Real-time Automation Protocols for Industrial Ethernet) was Korea's first Ethernet international standard for real-time data transmission. It is an Ethernet-based industrial networking protocol,[1] developed in-house by LSIS offers real-time transmission and is registered as an international standard.[2] (IEC 61158-3-21: 2010, IEC 61158-4-21: 2010, IEC 61158-5-21: 2010, IEC 61158-6-21: 2010, IEC 61784-2: 2010, IEC 62439-7)
Features edit
- An embedded Ethernet switch with two ports enables the network expansion in a daisy chain without the need for an additional external switch, easy installation and wiring reduction.[1]
- 100 Mbit/s - 1 Gbit/s transmission speed, allowing electrical and optical media to be used together.[1][3]
- Supports transmission modes such as Unicast, Multicast, and Broadcast.[1]
- Supports "Store & Forward”and “Cut Through” switching.[1]
RAPIEnet Technology edit
Protocol Stack Structure edit
Embedded dual port switch motion edit
- An embedded hardware-based switch is adopted for real-time data transmission.
- With the full-duplex communication support, each node has dual link routes in a ring topology.
Frame Format edit
- RAPIEnet Ether type: 0x88FE[4]
Topology edit
Recovery System edit
- With an embedded switch and full-duplex, it has dual link routes and communication fault tolerance, enabling fast recovery capabilities.
- - Recovery time < 10 ms[1]
- Transmits signal from Device 1 to Device 3.
- A fault occurs between Device 2 and Device 3.
- Notify the fault from Device 2 to Device 1.
- Transmits signal back from Device 1 to Device 3.
Flexible Hybrid Structure edit
- Fiber Optics/Copper Media
- - Copper: Low installation costs with relatively big noise.
- - Optics: High installation costs with low noise and relatively long wiring.
- Simple and efficient wiring is available by combining the features of two wires that have advantages and disadvantages.
System Diagram Using RAPIEnet edit
Acquired Standards edit
International Standards edit
- IEC 61158-3-21: 2010, Industrial communication networks - Fieldbus specifications - Part 3-21: Data-link layer service definition - Type 21 elements.[5]
- IEC 61158-4-21: 2010, Industrial communication networks - Fieldbus specifications - Part 4-21: Data-link layer protocol specification - Type 21 elements.[1]
- IEC 61158-5-21: 2010, Industrial communication networks - Fieldbus specifications - Part 5-21: Application layer service definition - Type 21 elements.[6]
- IEC 61158-6-21: 2010, Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification - Type 21 elements.[7]
- IEC 61784-2: 2010, Industrial communication networks - Profiles - Part 2: Additional fieldbus profiles for real-time networks based on ISO/IEC 8802-3.[8]
- IEC 62439-7, Industrial communication networks - High availability automation networks - Part 7: Ring-based Redundancy Protocol (RRP) [9]
Others edit
Other international standards in process edit
- IEC 61784-5-17, Industrial communication networks - Profiles - Part 5-17: Installation of fieldbuses - Installation profiles for CPF 17 (to be registered as an IEC international standard in 2012)[10]