Hi, I cannot seem to find how to create a switch that will let me perform one operation (heat) once a thermocouple hits 20C, and then heat through to 132C. As soon as the thermocouple hits 132C I need to switch to the other operation (cool), and cool down to 20C again, completing the cycle. While between 20C and 132C it needs to heat/cool depending on if it has just switched to heating or cooling. I made my own, but I only managed to heat to 132C, and as soon as the value fell below 132C, it started heating again, which is where I need it to cool down. Thanks for your help! Andrew P.S. I'm running Labiew 6.1, so I would prefer to have an explanation of what to do b/c some vi's may not work due to it being an early version. I'm also doing this for my internship, and am still in the early learning stages of using Labview. Thanks!

You create a shift register by right-clicking on the border of a loop. Try something like this: (some things will look differently in 6.1, e.g. the boolean diagram constants). See how far you get.

LabVIEW

Create a switch to turn on/off when it hits a certain value?

Solved!

Yes. Put in Select function that will choose between either the value you are continually updating with, or the value that comes out of the shift register untouched.

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LabVIEW

Create a switch to turn on/off when it hits a certain value?

Re: Create a switch to turn on/off when it hits a certain value?