readModified
Read modified data from an OPC HDA server
Description
reads modified data from the items defined by DObj
= readModified(HdaClient
,ItmList
,StartTime,EndTime
)ItmList
, stored on the OPC
HDA server connected to OPC HDA Client HdaClient
, between
StartTime
(inclusive) and EndTime
(exclusive).
DObj
contains only data items that have been modified, replaced, or
deleted on the OPC HDA server; that is, only data values that return a quality of
'Extra Data'
during a readRaw
operation. If a value has been modified multiple times, all values for
that time are returned.
Some servers do not support this function.
Examples
Input Arguments
Output Arguments
Version History
Introduced in R2011a