Report Control Block (unbuffered/buffered) in the SCL structure
The IEC 61850 standard defines a reporting mechanism that uses spontaneous data transmission. This aims to
minimize the network load. The generation and transmission of the report are controlled by the report control
blocks. A report control block is defined by its attributes, such as the assigned dataset, trigger options and
optional fields. The dataset is sent directly from the server to the client in case the configured event has occurred.
The KEY series gateways support both buffered and unbuffered RCBs.
In unbuffered RCBs the data is transmitted as defined by the chosen trigger options. In case of a connection
loss the data is not stored. Transmission resumes once the connection is re-established but information that
may have been transmitted during the connection loss will be lost.
In buffered RCBs, however, in the event of a connection interruption, the data is stored in a circular buffer. As
soon as the connection is re-established, the buffered information is transmitted in chronological order.
When Report Data Blocks are defined, they will always appear under the logical node GGIO1:
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