1342   OptFlds client write 9 bits or 10 bits?

Created: 07 Jan 2015

Status: Not Applicable

Part: Part 8-1 (2011; Edition 2)

Links:

Page: 76

Clause: 17.1.2

Paragraph: Table 62-Mapping of OptFlds within Bitstring

Category: Issue for edition 2 of this part

Issue

In IEC61850-8(ed2.0) "17.1.2 OptFlds shall be mapped to an MMS BITSTRING according to Table 62.",Table 62 define the size of OptFlds Bitstring is 10 bits, and then add "The segmentation bit is reserved in order to keep OptFlds and Reported OptFlds in alignment."
The question is:The length is 9 bits (exclude segmentation) or all 10 bits when the client write OptFlds?

Proposal

Suggest clear the length of bitstring when client write the OptFlds.

Discussion Created Status
09 Jan 15 Not Applicable
As 8-1 specifies:
The segmentation bit is reserved in order to keep OptFlds and ReportedOptFlds in alignment.

It is on purpose that the attribute OptFlds in the URCB/BRCB Class definition and the OptFlds service parameter in the Report request have the same format: i.e. 10 bit bitstring.


09 Jan 15 Discussion (red)

 

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