1120   Logical Node to be used for SV DAs mapping

Created: 30 Apr 2013

Status: Not Applicable

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

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Category: No impact on this part

Issue

If there is a case when we want to describe communications between logical nodes located in one device or different devices using standardized SCL simantics, then we feel lack of the LN (or DAs in standard LNs) that could allow us to map the information from TCTR instMag.i data attributes recieved via SV stream.

For example if we have two 9-2 streams with separate currents and voltages and we would like to specify the subscription of PDIS logical node in a remote device using an SCL file and <Inputs> and <ExtRef> tags, then we feel lack of DAs in PDIS LN that would allow us to map instMag.i data attributes. On the other hand the filtering may be essential in this case, then we would probably need some intermediate LN like MMXU, but 7-4 says "The main use [for MMXU] is for operative applications."

Proposal

It seems me, that either sampled values or RMS current and/or voltage inputs to Logical Nodes as optional fields could resolve this issue.