Triggering

[james_p_martin]

Hello all,

I am trying to detect a falling edge signal...which is actually the pressure value which falls when the component bursts and I have to capture that pressure from where it starts to fall off.....I am using Trigger and Gate signal vi for this but not able to configure it properly.

Could anybody please post some suggestions.

Regards

[Joe_H]

Could you post a sample of your code. Make sure you have the VI to trigger on the falling edge and then set the level. it is just like setting up the trigger for an oscilloscope.

[james_p_martin]

Hi Jhoskins,

Thanks for your reply...I have got the solution...actually I was calculating the burst pressure in that case I didnt know when my component is gonna burst so I just compared the actual and desired values and if the difference increases above the set limit I can note that....but could I use Trigger and Gate signal in these kind of cases???.

But I have now something else to ask....if you dont mind......I need to generate the desired pressure which will be ramp up at the rate which user enters for example. if he enters 1psi/sec. then the desired pressure should increase at this rate and I have to plot it on the graph/chart....till now what I have done in this is that in a while loop I have made a counter using feedback node which increaments by 1 and then I multiply it by the rate and divide it by 100...so I get the desired points every 10msec. so I am getting my desired points but not getting the rate at which my chart should update.....i.e. timing is not right.....in the while loop I have used time has elapsed vi which resets every 10msec. so that i can get value out of the loop.

So , could you please suggest me some ramp generation idea as per the rate entered by the user.

Regards

[Joe_H]

here's one that may work. I'm sure there is better methods for this but I only had a minute or two.