Draft61850-7-4©1EC:2002 -11- 57WG10-12(61850-7-4)R3.0/FD1S General LN Information System LNs...L Plant Level.../ Unit/Bay...C,P,R,A,M Process/Equipment Level .S,X,T,Y,Z General Use...G Data Semantics Annex Rules for LN extension Rules for Data extension Modeling Examples Figure 1-Overview of part IEC 61850-7-4 2 Normative references The following normative documents contain provisions,which,through reference in this text constitute provisions of this International Standard.At the time of publication,the editions indicated were valid.All normative documents are subject to revision,and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents as indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC61850-2 Communication networks and systems in substations -Part 2: Glossary IEC61850-5 Communication networks and systems in substations Part 5: Communication requirements for functions and devices models IEC61850-6 Communication networks and systems in substations -Part 6: Substation automation system configuration language IEC61850-7-1 Communication networks and systems in substations -Part 7-1: Basic communication structure for substation and feeder equipment-Principles and models 1EC61850-7-2 Communication networks and systems in substations -Part 7-2: Basic communication structure for substations and feeder equipment-Abstract communication service interface(ACSI) Version 3.0:22.August 2002Draft 61850-7-4  IEC: 2002 – 11 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 Plant Level . . . I Unit/Bay . . . C, P, R, A, M Process/Equipment Level . . S, X, T, Y, Z General Use . . . G Rules for LN extension General LN Information Data Semantics Annex System LNs . . . L Rules for Data extension Modeling Examples Figure 1 – Overview of part IEC 61850-7-4 2 Normative references The following normative documents contain provisions, which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents as indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 61850-2 Communication networks and systems in substations – Part 2: Glossary IEC 61850-5 Communication networks and systems in substations – Part 5: Communication requirements for functions and devices models IEC 61850-6 Communication networks and systems in substations – Part 6: Substation automation system configuration language IEC 61850-7-1 Communication networks and systems in substations – Part 7-1: Basic communication structure for substation and feeder equipment – Principles and models IEC 61850-7-2 Communication networks and systems in substations – Part 7-2: Basic communication structure for substations and feeder equipment – Abstract communication service interface (ACSI)