Improvement #5955: Indicate typical SIUnit for every DO with CDC MV would help users + Add a dedicated attribute in NSD files instead of having it in the description ? - IEC 61850 User Feedback Task Force - UCAIug Issue Tracking System

Improvement #5955

Indicate typical SIUnit for every DO with CDC MV would help users + Add a dedicated attribute in NSD files instead of having it in the description ?

Added by Aurelie Dehouck over 1 year ago. Updated 11 months ago.

Status:

Resolved

Priority:

Normal

Category:

Standard clarification required

Start date:

08/26/2022

Due date:

10/25/2022 (about 18 months late)

% Done:

Estimated time:

ID:

Source:

EDF

TF Unique ID:

WG10 Proposal:

Estimated Completion:

Discuss in Upcoming Meeting:

To discuss in WG10:

Short Proposal:

Standard(s):

Needs More Information:

Assigned TF:

Description

In IEC61850-7-4, some DO with CDC MV have a SIUnit that is indicated in the description of the DO.

Example : in MMET, DO EnvTmp of CDC MV has the description : "Temperature of environment [°C]."

But a lot do not have any.
It would be interesting for the comprehension of the semantic of the DO, to indicate a SIUnit for every DO with CDC MV (or indicate clearly if it has no unit)

In addition, it could be interesting to add a dedicated attribute for this purpose, in the NSD files, instead of having this information in the description

Related issues

Updated by Aurelie Dehouck over 1 year ago

To include also in IEC 61400

Updated by Carlos Rodriguez del Castillo over 1 year ago

Discuss in Upcoming Meeting changed from No to Yes

Updated by Carlos Rodriguez del Castillo over 1 year ago

Discuss in Upcoming Meeting changed from Yes to No

A couple of possibilities:

Make SIUnit mandatory in all analogue objects
Requires the description in NSD to include SIUnit: Does not solve the problem as the real SIUnit in a device can be different
To declare a default SIUnit in every analog object: Maybe problem with NSD...
Additional column in data objects (7-4) to indicate default SIUnit
Take into account that if you want to define a multiplier different that one (1), then SIUnit is mandatory and the unit is defined.
Decision: "Future work, for edition 3". Improvements in units is needed. We need a consistent solution over all parts of the standard. Trying to be backward-compatible.

Updated by Vladan Cvejic over 1 year ago

Copied to WG10 Future Work #5966: Indicate typical SIUnit for every DO with CDC MV would help users + Add a dedicated attribute in NSD files instead of having it in the description ? added