IEC 61850 has as a concept for the identification of all signals for communication
that belong to a function by a logical node as a placeholder. All signal information
in command and monitoring direction, which belongs to a function, is available
within the logical node.
Whenever a function block is instantiated in ACT, PCM600 automatically
generates the corresponding logical node data. In
Figure 67 this is shown by two
parts per function block. The upper part is the visible function block in ACT and
the lower part is the logical node data for the function block.
8.1.3.1 GOOSE data exchange
SEMOD58549-71 v11
The IEC 61850 protocol supports a method to directly exchange data between two
or more IEDs. This method is described in the IEC 61850–7–2 clause 15. The
concept is based on sending a multicast over the Ethernet. Whoever needs the
information detects the telegram by its source address and will read the telegram
and deals with it. The telegrams are multicast sent and not acknowledged by the
receiver.
en05000830.vsd
IED 3
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IED 2
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Data-set
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IED 1
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IEC 61850 Subnetwork
IEC05000830 V1 EN-US
Figure 68: IEC 61850: Horizontal communication principle
Figure 68 shows an example with three IEDs where each one communicates with
all the others.
When a GOOSE message is to be sent is defined by configuring the data set with
the defined trigger option and the GOOSE control block (GoCB). This engineering
process is done in the IET600 station configuration tool. The task involves
configuring lists with the signal, value and quality (data attributes) that belong to
the GOOSE message dataset.
In the opposite direction the standard only defines the IED as a receiver of the
GOOSE message. How the GOOSE input signals are handled must be defined in
the IED application configuration. The SCD file generated by the IET600 (or any
1MRK 511 398-UEN C Section 8
IEC 61850 communication engineering
670 series 2.2 IEC 109
Engineering manual
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