1686   Namespace declaration in accordance with latest IEC 61850-7-1

Created: 18 Mar 2020

Status: Future Improvement

Part: Part 9-2 (related to IEC 61869-9; 2016)

Links: #1688 Namespace declaration in accordance with latest IEC 61850-7-1 , #1687 Namespace declaration in accordance with latest IEC 61850-7-1

Page: 21

Clause: 6.903.5

Paragraph: first paragraph

Issue

Data Model namespace declarations for extensions by product standards have been clarified in the Ed2.1 amendment of IEC 61850-7-1. The concluded approach is machine processable and takes the presence conditions and rules defined by the product standard into account.
This is not covered yet by the current sentence "The value of dataNs data attributes of these extended data objects shall be “IEC 61869-9:2016”. "

Proposal

Replace the second sentence in the first paragraph:

The value of dataNs data attributes of these extended data objects shall be “IEC 61869-9:2016”.

by the following statement:

In accordance with IEC 61850-7-1, the data model namespace shall be declared in LPHD.NamPlt.lnNs as “IEC 61869-9:2016”.

Discussion Created Status
Approve 11 Oct 22 Future Improvement
Should be addressed by next edition of IEC 61869-9 as harmonization with published Ed2.1 series.
implementation compliant to IEC 61850 Ed2.1 have to use the following scheme:
LPHD, TCTRs and TVTRs uses lnNs = IEC 61869-9:2016[A] for the logical Node instances claiming conformance to the product standard.
The presence of dataNs in the DO extended by the product standard becomes optional as inhereted by the lnNs.
01 Apr 22 Approval (Future Improvement)
In accordance with published IEC 61850-7-1 2020-08-31, the data model namespace shall be declared in LPHD.NamPlt.lnNs as “IEC 61869-9:2016”.
Thererfore the conformance definitions of 7-1 Ed2.1 superseeds the name space approach specified by IEC 61869-9.
The next version of the 61869-9 product standard should harmonize with the IEC 61850-7-1 name space requirements.
I propose now that the IEC 61850-7-1 has been published to turn the tissue to Future Improvment.

01 Apr 22 Discussion (red)
IEC 61850-7-1 Ed2.1 clause J.8 (normative) prescribes the declaration of lnNs as "IEC 61869-9:2016", in order to account for the presence conditions of the product standard.
Therefore, the second sentence in the first paragraph is replaced by:

In accordance with IEC 61850-7-1, the data model namespace shall be declared in LPHD.NamPlt.lnNs as “IEC 61869-9:2016”.
30 Mar 20 Approval (Future Improvement)

 

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