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Feedback Nodes provide a storage mechanism between loop iterations. They are programmatically identical to the Shift Registers. Feedback Nodes consist of an Initializer Terminal and the Feedback Node itself (see Figure Feedback Node).
![media/image10.png](http://www.opentextbooks.org.hk/system/files/resource/8/8091/8154/media/image10.png)
To add a Feedback Node, right click on the Block Diagram window and select Feedback Node from the Functions »Programming »Structures pop-up menu. The direction of the Feedback Node can be changed by right clicking on the node and selecting Change Direction.
![media/image11.png](http://www.opentextbooks.org.hk/system/files/resource/8/8091/8154/media/image11.png)
The diagram shown in Figure Pipelining with Feedback Node is programmatically identical to the diagram in Figure Pipelined Tasks.
![media/image12.png](http://www.opentextbooks.org.hk/system/files/resource/8/8091/8154/media/image12.png)
Similarly, the diagram in Figure Pipelining Tasks with Feedback Nodes is programmatically identical to that in Figure Task Pipelining Program Example.
![media/image13.png](http://www.opentextbooks.org.hk/system/files/resource/8/8091/8154/media/image13.png)
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