Ethernet; Station Communication - Hitachi Relion 670 Series Product Manual

Phasor measurement unit RES670
Version 2.2
connected in a ring without losing a single microsecond in
accuracy.

18. Ethernet

Access points
An access point is an Ethernet communication interface for
single or redundant station communication. Each access
point is allocated with one physical Ethernet port, two
physical Ethernet ports (marked A and B) are allocated if
redundant communication is activated for the access point.
Device 1
AP1 AP2 AP3
SFP_301 SFP_303
SFP_302
IEC16000092 V2 EN-US
Figure 5. Access points, non redundant (left) and redundant
communication (right)
DHCP is available for the front port, and a device connected
to it can thereby obtain an automatically assigned IP-
address.
Front port is not available in the IED's with
blank front panel. By default, AP1 is
available for engineering. DHCP is not
available on AP1.
Access points diagnostics
The access point diagnostics function blocks (RCHLCCH,
SCHLCCH and FRONTSTATUS) supervise communication.
SCHLCCH is used for communication over the rear Ethernet
ports, RCHLCCH is used for redundant communications
over the rear Ethernet ports and FRONTSTATUS is used for
communication over the front port. All access point function
blocks include output signal for denial of service. To get this
denial of service, that is reported on the communication, the
DOSALARM output from these blocks must be connected to
a communication function.
For RSTP, the frame error rate on an
individual link cannot be extrapolated
accurately to that of which is received by
the IED. Hence, the frame error rate on link
A (LCCH.FerCh) and the frame error rate
on link B (LCCH.RedFerCh) cannot be
calculated and are 0 always.
Redundant communication
PRP IEC 62439-3 redundant communication
Redundant communication according to IEC 62439-3 PRP-0
and IEC 62439-3 PRP-1 parallel redundancy protocol (PRP)
is available as an option when ordering IEDs. PRP
Hitachi Energy
GUID-6E5D2696-A8EE-43E7-A94B-69C3D0612127 v4
Device 1
AP1 AP2
SFP_301 SFP_302
A B
IEC16000092-2-en.vsdx
GUID-20F64A6D-AA8C-47D7-AA7D-4810996B2FF2 v3
GUID-A90FDBA7-D4D7-4CBD-9F05-13DCC9971779 v9
© 2017 - 2022 Hitachi Energy. All rights reserved
according to IEC 62439-3 uses two optical/Galvanic (RJ45)
Ethernet ports.
HSR IEC 62439-3 High-availability seamless redundancy
Redundant station bus communication according to IEC
62439-3 Edition 2 High-availability seamless redundancy
(HSR) is available as an option when ordering IEDs.
Redundant station bus communication according to IEC
62439-3 uses two optical/Galvanic (RJ45) Ethernet ports.
The HSR ring supports the connection of up to 30 relays. If
more than 30 relays are to be connected, it is recommended
to split the network into several rings to guarantee the
performance for real-time applications.
AP3
SFP_303
RSTP Rapid spanning tree protocol
Rapid Spanning Tree Protocol (RSTP) is a network protocol
built for loop-free network topology and redundancy/backup
connections between switches.
• Support for RSTP is available on the Station level network
communication.
• RSTP is only available on the Access Point (AP) 1 or
Access Point (AP) 3. AP1 uses port 1 and port 2; AP3
uses port 3 and port 4.
• RSTP can be configured using Ethernet configuration
Tool (ECT) and PST in PCM600.
Routes
A route is a specified path for data to travel between the
source device in a subnetwork to the destination device in a
different subnetwork. A route consists of a destination
address and the address of the gateway to be used when
sending data to the destination device, see Figure 6.
Source
IEC16000095 V1 EN-US
Figure 6. Route from source to destination through gateway

19. Station communication

Communication protocols
Each IED is provided with several communication interfaces
enabling it to connect to one or many substation level
systems or equipment, either on the Substation Automation
(SA) bus or Substation Monitoring (SM) bus.
Available communication protocols are:
1MRK 511 410-BEN P
GUID-D87005A3-826E-4EB4-9B3D-9C6222CFEF6C v1
GUID-95F9C7BA-92F8-489F-AD0A-047410B5E66F v1
Default gateway
Gateway
Destination
IEC16000095-1-en.vsdx
M14815-3 v15
35