Automatically on and off Boolean switch

[basimss]

Hi,

My program needs to ramp up to a particular value and then ramp down, and this has to go on forever. I can use a switch to manually do this. If this switch works automatically, then my program will work continuously. Can someone tell me how to make automatically on and off switch?

Regards,

[altenbach]

Fortunately, LabVIEW is a real programming environment, so this can be done easily. The solution depends on how you do the ramping, so show us your VI.

[crossrulz]

Instead of a button, store a flag in a shift register and you can do just a little analysis to set or clear the flag so you know which way you are ramping.

[basimss]

hi,

I need to make ramp(Boolean) on and off forever. True case in the case structure is a ramp up and false is a ramp down.

Regards,

[basimss]

hi,

sorry for not uploading the vi.

[altenbach]

Sorry, I don't quite understand the code. Apparently this runs under RT. Why these bewildering constant conversion between datatypes (FXP, SGL, I16, etc). What the reason for the +1followed by -1 in the outer false case?

I'll have a look....

[altenbach]

Here is a quick draft. I would probably pre-compute the ramp and then simply index into it.

[Netsballer92]

I can't open in LabVIEW 16.0

[RavensFan]

Saved back to LV 14.

[Netsballer92]

Thanks,