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IDProjectCategoryView StatusDate SubmittedLast Update
000624910000-004: ServicesSpecpublic2020-11-11 16:202020-12-07 18:41
ReporterHock, Christian Assigned ToMatthias Damm  
PrioritynormalSeverityminorReproducibilityalways
Status closedResolutionfixed 
Summary0006249: The Server Capabilities Object defined in OPC 10000-5 identifies the sampling intervals supported by the Server
Description
  1. Paragraph in 5.12.1.2 Sampling interval:
    The Client may also specify 0 for the sampling interval, which indicates that the Server should use
    the fastest practical rate. It is expected that Servers will support only a limited set of sampling
    intervals to optimize their operation. If the exact interval requested by the Client is not supported
    by the Server, then the Server assigns to the MonitoredItem the most appropriate interval as
    determined by the Server. It returns this assigned interval to the Client. The Server Capabilities
    Object defined in OPC 10000-5 identifies the sampling intervals supported by the Server.
Steps To Reproduce

In "ServerCapabilitiesType" there is only a Property "MinSupportedSampleRate" defined.

Our assumption is:

  • It might be the Variable "SamplingIntervalDiagnosticsArray" defined in "ServerDiagnosticsSummary".

If our assumption is true:

  • "Server Capapilities Object" should be exchanged with "Server Diagnostics Object".
  • It might be also a good idea if the Variable "SamplingIntervalDiagnosticsArray" will be mentioned, too.
TagsNo tags attached.
Commit Version
Fix Due Date

Activities

Matthias Damm

2020-12-06 15:55

developer   ~0013373

Extended the paragraph with additional references to relevant information:

The Server Capabilities Object defined in OPC 10000-5 identifies the minimum sampling intervals supported by the Server. The optional MinimumSamplingInterval Attribute defined in OPC 10000-3 identifies the minimum sampling interval supported for a Variable. If a Server uses a fixed set of sampling intervals, the intervals can be exposed using the SamplingIntervalDiagnosticsArray in the ServerDiagnostics Object defined in OPC 10000-5.

Added in OPC 10000-4 - UA Specification Part 4 - Services 1.05.0 Draft12.docx

Jim Luth

2020-12-07 18:41

administrator   ~0013383

Agreed to changes in Virtual F2F.

Issue History

Date Modified Username Field Change
2020-11-11 16:20 Hock, Christian New Issue
2020-12-06 15:55 Matthias Damm Assigned To => Matthias Damm
2020-12-06 15:55 Matthias Damm Status new => resolved
2020-12-06 15:55 Matthias Damm Resolution open => fixed
2020-12-06 15:55 Matthias Damm Note Added: 0013373
2020-12-07 18:41 Jim Luth Status resolved => closed
2020-12-07 18:41 Jim Luth Fixed in Version => 1.05
2020-12-07 18:41 Jim Luth Note Added: 0013383