Basler Electric BE1-11 IEC 61850 Protocol - Manual (Page 22)

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To send GOOSE messages, a GoCB must be defined and a DataSet is needed which contains the data
objects of single data attributes to be sent. A GOOSE message is forced to be transmitted when a trigger
change is detected for a data attribute. All members of the DataSet will be copied in the send buffer with
their actual value and the message is sent. All subscribers which know the address of this GOOSE
message will receive the telegram. The GOOSE message includes a sequence number and a state
number to verify that all messages are received.
In the SCL communication section in the GSE element, the GoCB is listed under the ConnectedAP.
The IEDs which should receive a GOOSE message are informed in the SCL private section that they will
receive GOOSE messages. This is given when the external Reference, the name of the IED, and the
member of the DataSet is included in the LLN0 logic node under the structure of the Logic Device (LD) of
the receiving IED. The IEDs which receive the GOOSE are selected by BEST61850.
The IEC 61850 principle operation of GOOSE messages is illustrated in Figure 13.
Figure 13. IEC 61850: Principle Operation of GOOSE Messages
IEC 61850 Engineering BE1-11