940   Clarification of feedback MX for DO with CDC APC

Created: 05 Nov 2012

Status: In Force (green)

Part: Part 7-4 (2010; Edition 2)

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Category: Issue for edition 2 of this part

Issue

For DO with CDC APC the semantic of the feedback has not be stated.

Proposal

The attached document gives a proposal of additional description text for MX of the DO with CDC APC.

Discussion Created Status
08 Mar 13 In Force (green)
Change in the attachment: The feedback of ANCR.ColPos is the position of the coil (if available). If the position of the coil is not available the mxVal is irrelevant (acc. to the CDC APC it has the presence condition AC_ST). 07 Feb 13 Ballot Period
The tissue will be discussed in the next editors meeting (WG10 meeting in Mexico). 25 Jan 13 Future Improvement
I think the proposed text for the ANCR.ColPos is not consistent. The LN ANCR has three options to set the coil position: Changing it as a discrete tap position either directly to the poistion or with a higher / lower command and finaly with a analog control to a continuous coil position. In the first two cases, the return information is not the setpoint, but the current position of the coil. This should be consistent for the third option.

Also, it should e explained what the discrete position means. Is it a "usually as current in Amper" as explained for ColPosA? What does "usually" mean for a standard? 		11 Dec 12 Ballot Period
note that this is related to TISSUE 819 of IEC 61850-7-3, Ed2 11 Dec 12 Ballot Period
05 Dec 12 Ballot Period

 

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