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RAPIEnet
Protocol Information
Type of Network Open Real-time Ethernet
Physical Layer IEEE 802.3, Ethertype 0x88fe
Network Topology Ring/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, developed in-house by LSIS offers real-time transmission and "is registered as an international standard." (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※

  • 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.
  • 100 Mbit/s - 1 Gbit/s transmission speed, allowing electrical and optical media——to be, "used together."
  • Supports transmission modes such as Unicast, Multicast, and Broadcast.
  • Supports "Store & Forward”and “Cut Through” switching.

RAPIEnet Technology※

Protocol Stack Structure※

Figure 1. RAPIEnet Protocol Stack Structure
Embedded dual port switch motion※
Figure 2. RAPIEnet Embedded dual port switch motion

Frame Format※

Figure 3. ISO/IEC 8802.3 RAPIEnet based RAPIEnet frame format
Topology※
Figure 4. RAPIEnet chain topology
Figure 5. RAPIEnet ring topology
Recovery System※
  • With an embedded switch and full-duplex, it has dual link routes and communication fault tolerance, enabling fast recovery capabilities.
- Recovery time < 10 ms
Figure 6. RAPIEnet recovery system in a ring topology
Flexible Hybrid Structure※
Figure 7. RAPIEnet Flexible Hybrid Structure

System Diagram Using RAPIEnet※

Figure 8. System diagram using RAPIEnet
Acquired Standards※

International Standards※

  • IEC 61158-3-21: 2010, Industrial communication networks - Fieldbus specifications - Part 3-21: Data-link layer service definition - Type 21 elements.
  • IEC 61158-4-21: 2010, Industrial communication networks - Fieldbus specifications - Part 4-21: Data-link layer protocol specification - Type 21 elements.
  • IEC 61158-5-21: 2010, Industrial communication networks - Fieldbus specifications - Part 5-21: Application layer service definition - Type 21 elements.
  • IEC 61158-6-21: 2010, Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification - Type 21 elements.
  • IEC 61784-2: 2010, Industrial communication networks - Profiles - Part 2: Additional fieldbus profiles for real-time networks based on ISO/IEC 8802-3.
  • IEC 62439-7, Industrial communication networks - High availability automation networks - Part 7: Ring-based Redundancy Protocol (RRP)

Others※

Other international standards in process※

  • 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)

References※

  1. ^ IEC 61158-4-21: 2010
  2. ^ RAPIEnet related articles
  3. ^ ISO/IEC 8802-3: 2000
  4. ^ IEEE - Ether type
  5. ^ IEC 61158-3-21: 2010
  6. ^ IEC 61158-5-21: 2010
  7. ^ IEC 61158-6-21: 2010
  8. ^ IEC 61784-2: 2010
  9. ^ IEC 62439-7
  10. ^ IEC 61784-5-17
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