Table Of Contents
Multi Read History
Version:
Last Modified: November 14, 2019
Returns the historical values from multiple tags in a single operation.
tags in
tags in Reference to a specific tag or a group of tags on SystemLink Server or SystemLink Cloud.
Use Open Tag or Query Tags to obtain this reference.
window
window Time range you specify to read historical tag values.
The default is set to read all values decimated to 1,000.
error in
Error conditions that occur before this VI runs. The VI responds to this input according to
standard error behavior.
error in
next window
next window Time range you specify to read historical tag values.
The default is set to read all values decimated to 1,000.
tags out
tags out Reference to a specific tag or group of tags on SystemLink Server or SystemLink Cloud.
Use Open Tag or Query Tags to obtain this reference.
values
values Historical data values of the tag(s).
end of data?
end of data? Boolean that indicates whether the node read the last of the data for the tag.
error out