Small issues solved in LabVIEW projects

Before the graduate school started, I moved to the laboratory to help my supervisor in order to learn more.

My mentor gave me a labVIEW project, which was not difficult, and he completed most of it himself, but it was still a bit challenging for someone like me who knew nothing about virtual instruments. After a period of thinking, I learned a lot and wrote it down for reference in future work.

1. When executing a button event, the pop-up front panel is closed by pressing the WINDOWS panel cross key, and the program is stuck. It can only be closed by entering the resource manager. The reason is that the front panel is closed, but the loop program in the subVI has not ended, resulting in no way to perform other operations.

Solution :

1. Select Customize in the pop-up front panel file > VI Properties > Category > Window Appearance, and uncheck Allow users to close the window. This will disable the cross key during runtime and prevent the program from freezing. But what about programs that must enable the cross key? There is a second solution.

2. Add an event structure to the subVI program, select the front panel close item in in the add event branch and confirm. In this way, when the front panel is closed, set the corresponding handler to this branch. Generally, it exits the subVI loop.

2. When you need to introduce various parameters into a table for display, but the table format is not very regular, that is, when it is strictly arranged in rows and columns, it is impossible to put these parameters into the right place at once, such as the table shown in the figure below, what should I do?

Solution: I used a relatively stupid but effective method to solve it. I wonder how other experts solved it? I implemented it by calling the table node and setting the cell value.

The program reference is as follows:

3. If there is a set of data, the rows are even numbers from 2 to 100, and the columns are the corresponding 50 required parameters. What should I do if I need 100 parameters corresponding to all numbers from 1 to 100?

Solution: Use interpolation method. There are two interpolation functions in array function: one-dimensional array interpolation and one-dimensional array interpolation with threshold. The specific procedure is as follows:

4. When generating an executable file from a written program, how to execute the program without the LabVIEW environment?

Solution:

1. Install RUN-TIME ENGINE, which can be found in the LabVIEW installer.

2. Although RTE is installed on the computer and the front panel is displayed, it cannot run because some subVIs are missing. This is because some dynamic link libraries are missing in the executable file, so they cannot be called in the program.

Some commonly used dynamic link libraries are:

libguide40.dll

mkl_def.dll

mkl_lapack64.dll