Opens a reference to a tag on the server. If no reference of the tag exists on the server, the node creates one.

Inputs/Outputs

configuration

Connection to the server.

If you leave this input unwired, this node uses the default connection. It automatically retrieves your SystemLink Server credentials when you execute the application on a managed system or server.

path

Path to a tag reference.

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

data type

Data type of the tag reference.

If a tag with the same path but different data type already exists, Open Tag returns an error. Use Query Tags to open existing tag references of unknown data types.

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

tag

Tag the server references to communicate measurement data.

error out

Error information.

The node produces this output according to standard error behavior.

Using an Asterisk in a Tag Path

To set tag permissions for a group of tags or query a collection of tags, use an asterisk to match any sequence of zero or more characters in a tag path. For example, to return every tag that begins with example.path on the web server, enter example.path* in to the path input.