Types of Data Transfer in Real-Time Applications - LabVIEW Communications System Design Suite 3.1 Manual - National Instruments

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Last Modified: January 24, 2019

Use the following table to determine which types of data transfer to use in your real-time application.

Use Case	Type(s) of Data Transfer	Additional Information
Sending data between non-deterministic code on the same controller, when you only need the most recent set of data and do not need to avoid overwriting or losing data	Tag Data Value Reference Duplicated terminal	Tag Nodes Storing Data with Data Value References to Manage Memory Dataflow between Duplicates of the Same Terminal
Sending between non-deterministic sections of code on the same controller, when you need to avoid overwriting or losing data	Queue	Queue Nodes
Sending data to and receiving data from deterministic code, in a single real-time VI or across multiple real-time VIs	RT FIFO	Transferring Data to Deterministic Code
Sending and receiving short, non-critical messages over a network	UDP	Transferring Data Over a Network Using UDP
Sending and receiving data over a network	TCP Network Stream	Transferring Data Over a Network Using TCP Streaming Data Using Network Streams
Sending and receiving data between an FPGA and non-deterministic sections of code on the PC or real-time controller	DMA FIFO Read/Write FPGA Control	Direct Memory Access (DMA) FIFOs Read/Write FPGA Control

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