The DataObject SwModKey, specified in the LNClass LLN0 and CSWI is defined as determining if the interlocking check is bypassed during an operate request.
The Service Parameter Check.interlockCheck specifies already that the interlockCheck has to be performed (default) or has to be bypassed (emergency).
Based on Tissue #1782, the Checks are performed as requested as soon as the operational state allows the bypass.
Proposal
Modify the definition of SwModKEy based on the use case need of defining how local operation are performed (with interlock check, or temporarily with bypassing the interlock check).
Consider defining SwModKey at the IHMI LN, in case the IHMI needs to know if the Operate Requests are beeing issued with Check.interlockCheck = true (default) or = false (temporarily).
When SwModKey is present in the CSWI or in LLN0, is represents the SwModKey value at the IED, and indicates how local operate services will be issue (with Interlocking Check (default), or without).
consider limiting the SPC.cltModel to status only, as the SwModKey is either aquired
- via binary input
- via a real key
- via a button
- via a software button
There is no need to Operate the SwModKey.
Discussion
Created
Status
Change state to Conformance Test Preparation
25 Nov 24
Conformance Test Preparation
The technical error does not address any of the use cases of Part 7-1, Annex K and is further an improvement of the description text. The already descripted S1 mode has been understood for local operation only.
In summary: no compatibility issues.
20 Nov 24
Analysis Of Compatibility
Please find attached proposed draft as pdf-file. Changed text is marked in red.
20 Nov 24
Verify Draft Implementation
Change to drafting implementation state.
14 Aug 24
Drafting Implementation
This was discussed in the 2024/02/29 7-5/7-500 TF meeting as documented by Redmine issue: https://redmine.ucaiug.org/issues/6554. Ed.2 of 7-500 will include an explanation.
The definition of SwModKey shall indicate that it is only impacting check condition for local operation.
Definition of SwModKey in the IHMI LN is included in Ed.2 of 7-500.
29 Feb 24
Discussion (red)
Next stage : discussion
10 Oct 22
Discussion (red)
Accepted as decided in the group of experts/editors (7-2, 7-4)