Issues #6990: sSvp9 step 4 PTP class not 6/7 with/without holdover time? - Server - UCAIug Issue Tracking System

Issues #6990

sSvp9 step 4 PTP class not 6/7 with/without holdover time?

Added by Richard Schimmel 2 months ago. Updated 9 days ago.

Status:

In Progress

Priority:

Normal

Assignee:

Richard Schimmel

Due date:

12/10/2024 (Due in 19 days)

Discuss in Upcoming Meeting:

Clause Reference:

61850 Standard:

9-2

Triggering Tissue:

Final Decision:

Initial Test Document:

Updated Test Document:

Test Case ID:

sSvp14

Closed Reason:

--Not Set---

Triggering Tissue 2:

Triggering Tissue 3:

Description

IEEE 1588 defines clock class 6-7-52-187. When the master clock looses the GPS signal the master will continue. After a while the master clock will have clock class 7 and then 52 and then 187. When should the MU set the SmpSynch=1? Should it do immediately after clock 52 is received? May/Shall it wait it's own holdover time?
IEC 61869-9 is not that clear on this.

Proposal to add the holdover time:
4. Force the global PTP master to local (clockClass not 6 and not 7) by for example disconnecting the GPS antenna, then wait the holdover time (TVTR/TCTR.HoldTmms) plus 30 seconds