Gets (reads) and/or sets (writes) VI, VI object, and application properties. LabVIEW also includes a VISA Property Node and an ActiveX Property Node. Details
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reference is the refnum associated with an open VI, VI object, or an open instance of LabVIEW across a TCP connection. | ||||||
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error in describes error conditions that occur before this VI or function runs.
The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurs before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
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property 2..n is an example of a property you want to set (write). | ||||||
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dup reference returns reference unedited. | ||||||
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error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces.
Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
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property 1..n is an example of a property you want to get (read). |
To select the VI, Generic, or Application class, wire the VI, VI object, or application refnum to reference and the node adapts to the class. You also can right-click the node and select a Select Class submenu.
Move the cursor over terminals in the Property Node to display more information about the property in the Context Help window. You also can right-click a property terminal and select Help For Property from the shortcut menu, where Property is the name of the property.
To get property information, right-click and select Change to Read from the shortcut menu and to set property information, right-click and select Change to Write from the shortcut menu. If a property is read only, Change to Write is dimmed in the shortcut menu. The node executes each terminal in order from top to bottom. If an error occurs on a terminal, the node stops at that terminal, returns an error, and does not execute any further terminals. You can right-click the node and select Ignore Errors Inside Node from the shortcut menu to ignore any errors and continue executing further terminals. The error out cluster reports which property caused the error.
If the small direction arrow on the property is on the right, you are getting the property value. If the small direction arrow on a property is on the left, you are setting the property value. Properties have a short or long name that you can change by right-clicking and selecting Name Format from the shortcut menu. The No Names format displays only the data type for each property.
If the property to be written is variant, you can wire in LabVIEW data types and they automatically are converted to variant data types as indicated by a coercion dot. If the property is variant, use the Variant To Data function to convert to a LabVIEW data type, if needed.