Writes a data value to a tag, or to a tag proxy if it is configured to have write access.
The reference to the tag endpoint, or tag proxy endpoint if configured to have write access, to which to write a data value.
The data value that this node writes to the tag or tag proxy.
Data Type of value
The timestamp you want to associate with the data value that this node writes to the tag.
This input is available only if all of the following conditions are met:
If you do not wire this input and Has Timestamps? is enabled, this node automatically generates the current timestamp and associates it with the data value in the tag.
Associating Timestamps with Tag Data
Complete the following steps to associate a timestamp with the data value stored in a tag.
If the tag contains an initial value, the tag now associates that value with the timestamp when the tag was created.
You can also associate a custom timestamp to the data value that you write to a tag. If you wire a timestamp to the Write Tag node when writing a new data value to a tag, the node then associates that timestamp with the new data value.
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.
Default: No error
The reference to the tag endpoint or tag proxy endpoint to which this node wrote a data value.
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.
A tag is single-point, latest value data that you can access from multiple documents within a project. A tag can store a single value of any data type that represents the state of a process. Tags are similar to global variables in text-based programming languages.
You can create a tag either dynamically, using the Configure and Create Tag node on the diagram, or statically, in the shared resource collection file.
You can create a tag to access the same data from multiple VIs within a project.
A tag proxy is a reference that is local to part of the application that mirrors the value of the actual tag to which it is linked in another location in the application. You use a tag proxy to access data that is in another location in the application. You can read from and optionally write to a tag proxy only after the tag proxy links to a tag.
Complete the following steps to statically create and configure a tag.
Where This Node Can Run:
Desktop OS: none
FPGA: All devices
Web Server: Not supported in VIs that run in a web application