816   Conditions for attribute inclusion

This tissue has following status: blue

Created: 16 Jan 2012

Links:

Page: 10

Clause: 5 Conditions for attribute inclusion

Paragraph: AC_CO_O

Category: No impact on this part

Issue: 7-3 Ed2:
AC_CO_O = If the controllable status class supports control, this attribute is available and an optional attribute.

7-2 Ed2:
PICS.M11 defines Control Model and PICS.S54 for Operate as mandatory for Servers

If an IED does not support any data object of class "controllable" (its a measuring IED only) or supports controllable but with (ctlModel = status-only) then it does not make sense to support Control model and operate.

A tissue for 7-2 Ed2 may be added as well.

Proposal: Add some text, e.g. extended text see below:

7-3 Ed2:
AC_CO_O = If the controllable status class supports control and if the (ctlModel is unequal status-only), this attribute is available and an optional attribute.

7-2 Ed2:
PICS.M11 defines Control Model and PICS.S54 for Operate as mandatory for Servers

Change M to cxx for M11 and S54:

cxx – shall be ‘M’ if an server implements at least one controllable data object with ctlModel unequal status-only.

Discussion Created Status
?
Ballot until Editor
No change is needed therefore tissue is set to status blue. 28 Feb 12 blue
18 Jan 12 final proposal 18.2.2011
Even if an server has no object which is commandable, it should support the Operate command so that it can give a reasonable (negative) response. Therefore no change to 7-2.
AC_CO_O already means that the attribute is optional. The implementor has to decide if it makes sense to provide it (e.g. if 'status-only' is dynamically changeable) or not. Even if it makes no sense to supply it, it does not harm if it is there. Therefore also no change needed.
17 Jan 12 red

 

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