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The class interface changes and a new set of properties and methods are now selectable, shown in Figure 6.
Using the Class Browser. Dotted properties are a shorthand alternative to cascading multiple Property Nodes that return interface references needed for wiring properties and methods specific to a given interface.
Place a checkmark in the Show Creatable Objects Only check-box to display only objects that you can create. The Type Library list contains the type libraries for all the registered ActiveX servers on the system in alphabetical order.
Selecting a dotted property. Figure 10 shows the Context Help window for the AutoRange property. Refer to the instrument driver help to determine the array data type.
In Figure 7notice that the sessions to the DCVoltage interface and to the driver session are closed after they are used. Using dotted properties and methods. Instrument drivers simplify instrument control and reduce test program development time by eliminating the need to learn the programming protocol for each instrument.
Each routine corresponds to a programmatic operation such as configuring, reading from, writing to, and triggering the instrument. Automation Ivk-c and type library refnum. Select the same type library you selected for the Automation Open refnum.
An example of how to access the help for the Initialize method is shown in Figure 9.
Using an IVI-COM Instrument Driver in LabVIEW
Dottable properties have a blue glyph next to the property name. Agilent IO Libraries Suite version An instrument driver is a set of software routines that control a programmable instrument. A dialog box appears, shown in Figure 1.
Converting variant data to an array See Also: This list can be long, so you might need to browse for keywords that match the driver, such as the vendor name or “IVI”.
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Rate this document Select a Rating 1 – Poor 2 3 4 5 – Excellent. Selecting help for Initialize method. The block diagram 3401a now appear similar to Figure 2. This is typically the first interface in the list.
Click on the block diagram to place the Initialize method on the diagram.