Returns the historical values from a single tag. The data type of the tag must be a string.

Inputs/Outputs

tag in

Reference to a tag on the 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 node runs.

The node responds to this input according to standard error behavior.

Default value: No error

next window

Next page of historical tag data, if available.

tag out

Reference to a specific tag on SystemLink Server.

values

Data value of the tag or tags.

time stamps

Dates and times the server obtained the most recent historical data values.

error out

Error information.

The node produces this output according to standard error behavior.

end of data?

Boolean that indicates whether the node read the last of the data for the tag.