Allow Output Tunnel of Case Structure to Use Previous Value if Unwired (Latch)

[jdigiova]

I could create cleaner diagrams faster if I had an option on the output tunnel of a case structure to use previous value.

[RavensFan]

I think Altenbach's idea A better way to define the output of unwired output tunnels would be more useful.

Or at least your idea could be incorporated into that.

[altenbach]

I actually like the simplicity of it. Could be useful, but might obfuscate code to some degree.

We would also need a way to define the initial value if the code executes an unwired case on the first call. This could be most easily done if we also had my idea that Ravens mentioned above. 😉

[Jarrod_S.]

I'm not a fan of this, personally. It seems like it would definitely obfuscate code. And one big struggle that new LV users have is how to make sense of what happens with the outputs from a case structure when another case executes. Another option might just confuse them more.

You can solve your particular use case involving the Feedback Node by using the Enable Terminal. That determines whether or not to actually store the new value into the node.

[Jarrod_S.]

Here is a pic describing what I meant about the Enable Terminal on a Feedback Node.

[CRivett]

Hey, I saw the orignal post where you can just right click the tunnel and use the previous value. how can i implement this way of using the previous value if the tunnel is unwired. And what happens when it goes through the first itteration and the first case has unwired tunnels? they will be written over the next itteration but will this be a problem through the first itteration?

thanks very much

[crossrulz]

CRivet,

You can't currently.  This board is the LabVIEW Idea Exchange.  This is where we post ideas for NI to implement in LabVIEW.  This was just one of those proposed ideas.  If you like the idea, give it a kudo.  The kudo in this board is like a vote to support the idea.  Supposedly, the more kudos the more NI will look at the idea.

[CRivett]

oh i see, my mistake i'm still fairly new to labview thanks very much for the clarification 

[Darren]

Any idea that has received less than 6 kudos within 6 years after posting will be automatically declined.