Table Of Contents

Query Tags (G Dataflow)

Last Modified: November 18, 2019

Searches the server for tags matching the criteria you specify.

If an input is empty, this node opens references to every tag on the server.

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configuration

Connection to the server.

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paths

Paths to tag references.

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Note  

Tag paths do not support spaces. If an illegal character is present, the node returns an error.

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keywords

Specific words provided to find tags.

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properties

Key-value pairs that exist as metadata on a tag.

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error in

Error conditions that occur before this node runs.

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

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

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skip

Number of tags skipped to limit the amount returned from the server.

If the input is left empty, the query returns the first 1000 results by default.

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take

Number of tags requested from the server.

If the input is left empty, the query returns the first 1000 results by default.

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tags

Tags the server references to communicate measurement data.

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total count

Total number of tags on the server.

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error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Supported in VIs that run in a web application


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