Hi,
There is no built in VI in LabVIEW that will allow you to do this. I also tried looking for any examples but did not have much luck!
However, you can built one yourself just like you would in any other programming language. There are many ways of implementing a smooth ramp. One that I found was:
Smooth double ramp function (hyperbolic tangent)If you think that this kind of VI should be part of LabVIEW, please submit your feedback on http://www.ni.com >> Contact NI >> Product Feedback.
Feroz