To display this dialog box, right-click a Wait On Asynchronous Call node and select Timeout from the shortcut menu.
This dialog box allows you to specify how long an instance of the Wait On Asynchronous Call node waits for the target VI specified by the reference input to finish executing.
Timeout (milliseconds)—Specifies how long the Wait On Asynchronous Call node waits for the VI indicated by reference to finish executing. The timeout period begins when LabVIEW calls the Wait On Asynchronous Call node. By default, Timeout (milliseconds) is -1, indicating that the Wait On Asynchronous Call node waits forever for the target VI to finish executing.