This list can be long, so you might need to browse for keywords that match the driver, such as the vendor name or “IVI”. Interchangeable Virtual Instrument IVI drivers are an exciting new instrument control software technology. This section discusses MAX. IVI drivers include two distinct initialization VIs. For instrument drivers that support a family of instruments, you can also use the option string to set the particular model of instrument that you want the driver to emulate. If simulating, make sure that you select Specific Driver from Simulate With. Or, when you are using an oscilloscope driver in simulation mode, the ReadWaveform function will return an array of random numbers within valid ranges for the scope.
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When you make calls to a class driver, the class driver then calls the specific driver to perform its function.
Installing Software Refer to the instrument driver Readme file for detailed software requirements. Viewing context help for AutoRange labivew. Note If the actual instruments are connected to your system, you can run the same examples with simulation disabled. It is redundant to send the other four settings each time you run the VI.
Selecting a dotted property. IVI drivers give you features that do not exist in traditional instrument drivers. However, as you can imagine, random data is not very meaningful for your program or your units under test Iiv.
Each routine corresponds to a programmatic operation such as configuring, reading from, writing to, and triggering the instrument. When calculating the valid vertical range, IVI oscilloscope drivers take into account the attenuation of the probe. The VI configures the parameters for labivew function generator and sets the waveform shape, amplitude, offset, frequency, and start lbview for a waveform.
Along with using MAX, IVI becomes even more powerful because it enables you to change settings outside of the application.
Using an IVI-COM Instrument Driver in LabVIEW – National Instruments
Plug and Play Instrument Drivers Plug and Play Instrument Drivers simplify controlling labviee communicating with your instrument through a standard and simple programming model for all drivers. Each instrument driver function call requires a valid instrument handle as an input parameter.
Class drivers are what enable IVI drivers to be interchangeable. To disable a feature, you set its value to 0.
Using IVI Drivers to Simulate Your Instrumentation Hardware in LabVIEW and LabWindows/CVI
In addition to generating data, you can use simulation drivers to inject simulated errors into your program. Consider the following example. Simulation mode provides the benefits shown in Table 1. In this DMM example, if you set the range to For example, when you are using a DMM driver in simulation mode with labgiew simulation driver enabled, a data panel will be displayed whenever the Measure function is called.
IVI – National Instruments
labvkew When using traditional instrument drivers, you have to supply some functions with the name of the channel that you would like to configure or measure. When you pass simulation with a value of 1, that alerts the driver that the instrument is not connected to the computer.
Along with driver sessions, you also see the subfolder for Logical Names. Automation Open and type library refnum. You are now ready to lzbview the example program using the same logical name but a different instrument. You can use MAX to swap instruments without recompiling or relinking the application source code.
In addition, the simulation drivers are available in source code, so users can insert their own code to generate simulated data more customized to their application.
To take multiple readings, click Read repeatedly. This section discusses MAX.
After completing the example, you will be able to perform the following tasks: You can also configure the driver to pop up the panel each time the function is called, or automatically generate the data within the specified range every time.
For example, when you use a DMM driver in simulation mode, the Measure function will return a random number within the valid range of the current mode of the DMM. State Caching IVI drivers maintain the physical state of instruments in a software cache to increase the efficiency and speed of instrument drivers.
Back to Top 4. Simply replace the resource name string with fl Refer to the instrument driver help to determine the array data type.