ProSoft Technology PLX81-EIP-61850 - Manual (Page 147)

PLX8x-EIP-61850 ♦ Communication Gateway Glossary of Terms
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IEC 61850 Client User Manual
ProSoft Technology, Inc. Page 147 of 167
July 2, 2015
Conformance Test
Check of data flow on communication channels in accordance with the standard
conditions concerning access organization, formats and bit sequences, time
synchronization, timing, signal form and level, and reaction to errors. The
conformance test can be carried out and certified to the standard or to
specifically described parts of the standard. The conformance test should be
carried out by an ISO 9001 certified organization or system integrator.
Connection
Association established between functional units for conveying information.
Connectivity Node
An identifiable, named, common connection point between terminals of primary
devices whose only function is to connect them electrically with minimum
resistance; for example, a bus bar as a connectivity node connects bus bar
disconnectors. The connection to a device is done at a device terminal. A
connectivity node can connect an arbitrary number of terminals (devices).
Cyclic Redundancy Check (CRC)
A check for transit damage in frames. It is calculated and included in each frame
transmitted by the sending device, and recalculated by the receiving device.
D
Data
Meaningful, structured, information of applications, located in an IED, which can
be read or written.
Data Attribute
Property of data the defines its name (semantic), format, range of possible
values, and representation of values while being communicated.
Data Class
Class that aggregates data classes or Data Attributes. Specific data classes
carry the semantic within a logical node.
Data Link Layer
Layer 2 of the OSI reference model for Open Systems Interconnection,
responsible for the transmission of data over a physical medium. After
establishment of a link, layer 2 performs data rate control, error detection,
contention/collision detection, quality of service monitoring and error recovery.
Data Object
A data structure that is part of a logical node and represents specific information.