ABB Relion 670 series - Application

20.2.2 Application
Dynamic access point diagnostic (RCHLCCH) is used to supervise and assure redundant
Ethernet communication over two channels. This will secure data transfer even though
one communication channel might not be available for some reason
Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR)
provides redundant communication over station bus running the available communication
protocols. The redundant communication uses two Ethernet ports.
IEC09000758-4-en.vsd
Switch A
AP1
PhyPortB
PhyPortA
AP1
PhyPortA
PhyPortB
AP1
PhyPortB
PhyPortA
AP1
PhyPortA
PhyPortB
Switch B
Device 1
Device 2
Device 3
Device 4
IEC09000758 V4 EN
Figure 401: Parallel Redundancy Protocol (PRP)
1MRK 506 369-UUS - Section 20
Ethernet-based communication
Line distance protection REL670 2.2 ANSI 857
Application manual