StartTime/EndTime – OPC Unified Architecture – Part 11: Historical Access

OPC Unified Architecture – Part 11: Historical Access

v1.05.04

1Scope
2Normative references
3Terms, definitions, and abbreviations
- 3.1Terms and definitions
- 3.2Abbreviated terms
4Concepts
5Historical Information Model
6Historical Access specific usage of Services
Annex AClient conventions (Informative)
- A.1How clients can request timestamps
- A.2Determining the first or last historical data point

3.1.9 StartTime/EndTime

bounds of a history request which define the time domain

Note 1

Note 1 to entry: For all requests, a value falling at the end time of the time domain is not included in the domain, so that requests made for successive, contiguous time domains will include every value in the historical collection exactly once.