179   IED parameters not exposed in object models

Created: 04 Aug 2005

Status: Discussion (red)

Part: General

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Category: Issue for edition 2 of this part

Issue

This expands the issue raised in Tissue 139. There are several parameters resident in the IEDs that are not exposed via the object models in Parts 7, 8, and 9, although they are managed by SCL in Part 6. These include the clients to which reports are to be addressed, the maxima of allowable data sets and reports, and identification of whether certain data values are settable by the client.

These parameters may be needed by clients. For example, in Part 10 there are tests specified to determine that service errors are issued in response to attempts to exceed the maximum numbers of data sets and reports. However, the only way a client can discover whether an attempt might exceed the maximum is to make the request and see if a service error results.

It would be better to expose such parameters to the client through the object models and the normal discovery process rather than forcing discovery by trial and service error.

Proposal

Include the relevant parameters in the object models of Parts 7, 8, and 9.