Multi Read History
- Updated2025-07-28
- 1 minute(s) read
Returns the historical values from multiple tags in a single operation.

tags in
Reference to a specific tag or a group of tags on SystemLink Server.
Use Open Tag or Query Tags to obtain this reference.
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.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
Reference to a specific tag or group of tags on SystemLink Server.
Use Open Tag or Query Tags to obtain this reference.
values
Historical data values of the tag(s).
end of data?
Boolean that indicates whether the node read the last of the data for the tag.