In this lecture, I'm going to show you how to use the R b injured or returned by exception, the RPG
note is available down here under functions.
What it does is that it will only pass changes to its output, changes of its input to its output.
Its input does not change.
Then it will not forward it to the output.
So it's easier to demonstrate, deploy this flow and of God and inject note here, sending a one and
another inject node, sending a two to my Arby node.
So first I'm going to click on the one on the first debug node and you can see that its value did pass
through to the output.
Now I'm going to click on the same node again and again and again.
You can see up here it says that this node is injected with trigged.
But nothing reaches the output, and that's because and that's because there is no change between the
existing value and the new value that is held inside the RV inhered, and therefore it does not pass
through.
But if I send it a two to different value, you can see that that is passing through.
Can you send a few more twos again?
And none of them passes through?
I can go back to one and that is now passing through.
And because I've got different values coming through the RBA, you know, those are being passed through.
So it's pretty simple the way that it works.
There's not that much configuration wise, at least in these properties.
You can see that you've got a few choices of how you would like this node to handle change.
The simplest one is to just block change unless the value actually changes.
So I am actually using this specific node in my project so that my flow terrarium controller will only
tell the ADENHART to start and stop the pump motor if its previous instruction was opposite to the current
instruction.
So that way I'm just saving a little bit of bandwidth there and making the process a bit more efficient.