249   Mapping of CODED ENUM

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Created: 04 Nov 2005

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Page: 34

Clause: 8.1.2.3

Paragraph:

Category: No impact on this part

Issue: According to what is written in clause 8.1.2.3:
"CODED ENUM is represented by a bit-string. The size of the bit-string .... The value of a particular bit-string shall be the unsigned integer encoding of the enumerated values in the order specified in IEC 61850-7-2 and IEC 61850-7-3."

In part 7-1 there is an example with a MMS message in which "stVal (CODED ENUM)" DataAttribute belonging to the Pos of a CSWI is mapped as an integer

There seems to be contradictions between different paragraphs of the standar.It's not clear if CODED ENUM must be mapped as a bit-string or as an integer.

Proposal: Clarify which of the two possible ways of maaping a CODED ENUM is correct:
* Mapped as a bit-string or
* Mapped as the smallest integer that meets the enumerated values of datas as specified in IEC 61850-7-2 and 7-3.

Discussion Created Status
?		 Ballot until Editor
8-1 is clear. If there is a problem in 7-1. Tissue will be transfered to 7-1. 02 Dec 05 blue
CODED ENUMs are always mapped to BITSTRINGS in 8-1 (unless otherwise noted). Therefore, the example in 7-1 is probably incorrect.
04 Nov 05 red

 

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