Hello rothmans,
To answer your question, the first property node is returning the values associated with the three properties of value, timeout and interface type. The VISA class is of type Instr, which inherits properties from the I/O class type. Some of these properties are described in more detail in the LabVIEW Help for these two classes. For instance, the interface type returning a value of 4 means that it is a serial interface type. This output is then passed to a case selector so that different actions are performed based on which interface you are using to connect to the instrument. The User Data property is something that is not specifically used by VISA, but is available for use in an application. I would check the driver for more details about the purpose of the User Data property. According to the use case though, it appears to simply check if the value is nonzero.
The second property node sets the minimum timeout time used when communicating with the instrument. Then the third property node resets the timeout value to the original value read in the first property node after the action with the instrument has been performed.
Hope this helps, these are all described more in the help for the properties for LabVIEW if you would like more details.
Regards,
Angela
Applications Engineer
Message Edited by Little A on 11-10-2006 12:48 PM
