369   LD0 with 2 LNs only (instead of minimum of 3)

Created: 24 Aug 2006

Status: In Force (green)

Part: Part 7-2 (2003)

Links:

Page: 036

Clause: 08.1.1 / 8.1.2.3

Paragraph: Table 14 / 2nd paragraph

Category: Issue for edition 2 of this part

Issue

The Logical Device Zero (LD0) - defined in IEC 61850-7-1 - requires a minimum of two LNs: LLN0 and LPHD.

The definition of LD in 61850-7-2 clause 8 defines a minimum of 3 LNs.

Proposal

Add some definition/note that the requirement of "LogicalNode [3..n]" is not applicable for LD0. LD0 is a special LD with just [2..n].

Discussion Created Status
Set status to green 11 Feb 07 In Force (green)
Set status to final proposal.

Final propoal:
Change multiplicity from [3..*] to [2..*]

Revised description:

8.1.2.3 LogicalNode [2..n]

The attribute LogicalNode shall identify a LOGICAL-NODE that is contained in a LOGICAL-DEVICE.

Each LOGICAL-DEVICE shall have one and only one LOGICAL-NODE-ZERO (LLN0), one and only one LOGICAL-NODE-PHYSICAL-DEVICE (LPHD), and it may have one or more other LOGICAL-NODEs.
NOTE The LLN0, LPHD, and other logical nodes are defined in IEC 61850-7-4.


The Attribute is named "LogicalNode" (singular); should it be "LogicalNodes"? (plural) 		08 Dec 06 Ballot Period
Accepted. I would even allow all LDs with two LNs, e.g. if they are just proxy to supervise other IEDs. 25 Aug 06 Discussion (red)

 

Privacy | Contact | Disclaimer

Tissue DB v. 23.12.13.1