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5 result(s) for modified values

• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  3.1.7 ModifiedValues
  ModifiedValues HistoricalDataNode ' s value that has been changed (or manually inserted or deleted) after it was stored in the historian Note 1 to entry: For some Servers , a lab data ... would be considered a modified value , and would be returned during a request for ModifiedValues . Also manually inserting a value that was missed by a standard collection system
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  6.5.1 Overview
  each operation (see 6.6.2 ). ReadRawModifiedDetails Read modified This parameter selects a set of ModifiedValues from the history database by specifying a time domain for one or more Variables
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  6.5.3.2 Read raw functionality
  values for a given timestamp, all but the most recent are considered to be ModifiedValues and the Server shall return the most recent value. If the Server returns a value
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  6.5.3.3 Read modified functionality
  Read modified functionality When this structure is used for reading ModifiedValues (isReadModified is set to TRUE), it reads the ModifiedValues, StatusCodes , timestamps, modification type, the user identifier, and the timestamp ... values in the range are returned. If the Server cannot return all ModifiedValues for a given timestamp in a single response then it shall return ModifiedValues with the same timestamp
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  6.9.6.2 Delete at time functionality
  Delete at time functionality The DeleteAtTime structure deletes all raw values, ModifiedValues , and Annotations in the history database for the specified timestamps for one or more HistoricalDataNodes . This parameter