Table of Contents
Line distance protection REL670
Version 2.2
18. Human machine interface
Local HMI
IEC13000239 V3 EN-US
Figure 12. Local human-machine interface
The LHMI of the IED contains the following elements
• Graphical display capable of showing a user defined
single line diagram and provide an interface for controlling
switchgear.
• Navigation buttons and five user defined command
buttons to shortcuts in the HMI tree or simple commands.
• 15 user defined three-color LEDs.
• Communication port for PCM600.
The LHMI is used for setting, monitoring and controlling.
Remote IED access
Instead of the LHMI the Remote IED Access tool, RIA600,
can be used and perform all of the actions that a physical
LHMI can. The LHMI is then replaced by a blank front plate.
19. Basic IED functions
Time synchronization
The time synchronization function is used to select a
common source of absolute time for the synchronization of
the IED when it is a part of a protection system. This makes
it possible to compare events and disturbance data between
all IEDs within a station automation system and in between
sub-stations. A common source shall be used for IED and
Hitachi Energy
merging unit when IEC/UCA 61850-9-2LE process bus
communication is used.
AMU0600442 v16
Precision time protocol PTP
PTP according to IEEE 1588-2008 and specifically its profile
IEC/IEEE 61850-9-3 for power utility automation is a
synchronization method that can be used to maintain a
common time within a station. This time can be
synchronized to the global time using, for instance, a GPS
receiver. If PTP is enabled on the IEDs and the switches
that connect the station are compatible with IEEE 1588, the
station will become synchronized to one common time with
an accuracy of under 1us. Using an IED as a boundary
clock between several networks will keep 1us accuracy on
three levels or when using an HSR, 15 IEDs can be
connected in a ring without losing a single microsecond in
accuracy.
20. 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
IEC13000239-3-en.vsd
redundant communication is activated for the access point.
Device 1
IEC16000092 V2 EN-US
Figure 13. Access points, non redundant (left) and redundant
DHCP is available for the front port, and a device connected
to it can thereby obtain an automatically assigned IP-
address.
Access points diagnostics
M11344-3 v12
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
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The IED supports SNTPv4 (RFC2030).
AP3
AP1
AP2
SFP_301
SFP_302
SFP_303
communication (right)
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.
1MRK 506 372-BEN Q
GUID-6E5D2696-A8EE-43E7-A94B-69C3D0612127 v4
Device 1
AP2
AP1
SFP_302
SFP_301
B
A
IEC16000092-2-en.vsdx
GUID-20F64A6D-AA8C-47D7-AA7D-4810996B2FF2 v3
M11345-3 v13
AP3
SFP_303
57
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