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After a loop completes a single iteration, sometimes you want to use the value of one of its calculations in the next loop iteration. You can use a shift register to pass data from the most recent iteration ...

By default, each loop iteration executes as quickly as possible based on the code inside the loop. However, you might want to control the rate at which a loop executes in order to specify a fixed time ...

On the Document tab, in the Behavior section, click Properties to access VI Reentrancy options for your subVI. In the resulting dialog box, select the Execution tab. Choose one of the following options: ...

To turn an existing VI into a subVI, use the icon editor to assign input and output terminals and to customize the appearance of the subVI node. What to Do Select EditIcon and connector pane to display ...

Loop timing refers to how long a loop takes to execute a single iteration. The amount and type of code a loop contains affects its execution speed. By default, each loop iteration executes as quickly as ...

Returns one of two specified values depending on a Boolean value. DAQExpress does not support FPGA devices Supported in VIs that run in a web application true value Value that this node returns if selector ...

Waits until the value of the operating system's timer becomes a multiple of a specified amount of time. Use this node to synchronize activities.

Repeats the code on its subdiagram until a specific condition occurs. A While Loop always executes at least one time. A While Loop behaves similarly to a do while loop in other programming languages. DAQExpress ...

To develop an API to distribute to other users that is consistent with NI style recommendations for G content, refer to the following best practice guidelines: File Organization and Node Naming Component ...

You can save and analyze the data that a device or code generates in a variety of ways. Viewing data in different formats can provide insight into trends or outliers in the data. What to Use An application ...

In some situations, you might know that you want to repeat an operation, but you do not know exactly how many times you want to repeat that operation. Instead, you know only that the operation should repeat ...

A loop is a programming element that executes the same code multiple times, or iterations. Types of Loops Loop Behavior Example Diagram For Loop Repeats the code inside the loop for a set number of iterations. ...

Select the section of code you want to reuse. Click EditCreate subVI from selection to generate a new .gvi file in the project. To open this file, double-click the corresponding subVI node that contains ...

By default, each loop iteration executes as quickly as possible based on the code inside the loop. However, consider a program that includes multiple loops that contain code requiring different amounts ...

By default, each call to the subVI is executed one after another. This may cause your application to execute slowly or have unexpected behavior. To allow multiple calls to a subVI to execute simultaneously, ...

Right-click the diagram of an existing VI and select Create New SubVI to add an empty subVI node to the diagram. This creates a new .gvi file and adds it to the project. This file corresponds to the subVI ...

Instead of creating the same code on a diagram multiple times, you can write code in a single location and use a For Loop to programmatically repeat it. For example, you might want to read a specific number ...

What to Use Open/Create/Replace File A read or write node from the Storage palette category Close File What to Do Create the following diagram to programmatically open, write to, and close a text file. ...

While working with an array of data, you might want to access individual elements within the array. Although you can use a combination of Array nodes to accomplish this task, the For Loop includes an auto-indexing ...

Contains one or more subdiagrams, or cases, exactly one of which executes when the structure executes. The value wired to the selector terminal determines which case to execute. Case Structures behave ...

Closes a reference to an open file to free the resources used by the reference. Error I/O operates uniquely in this node, which closes the file regardless of whether an error occurred in a preceding operation. ...

Subtracts 1 from the input value. DAQExpress does not support FPGA devices Supported in VIs that run in a web application Behavior for Enum Data All arithmetic functions except Increment and Decrement ...

Executes its subdiagram n times. The iteration terminal provides the current loop iteration count, which ranges from 0 to n-1. DAQExpress does not support FPGA devices Supported in VIs that run in a web ...

Adds 1 to the input value. DAQExpress does not support FPGA devices Supported in VIs that run in a web application Behavior for Enum Data All arithmetic functions except Increment and Decrement treat enum ...

Obtains a reference to a file. DAQExpress does not support FPGA devices Not supported in VIs that run in a web application Opening, Processing, and Closing Files prompt Custom message in the title bar ...

Searches a string for the next token, where a token is defined as either the next set of characters that appears before a specified delimiter or as one of a specified set of operators. DAQExpress does ...

You can use a duplicated output terminal to write to an indicator at multiple places on the diagram. You can also use a duplicated input terminal to read from a control at multiple places on the diagram. ...

Data in a control flows from the panel to the diagram through a corresponding input terminal. Data in an output terminal flows from the diagram to the panel through a corresponding indicator. The following ...

Terminals transfer data between the diagram and other VIs via subVIs. The following image shows the flow of data between terminals of the calling VI and a subVI. The calling VI passes data to the Percentage ...

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