Lambiek

There is a simple way using the select function. It takes a minute or two to test that it's correct with values just below, equal and just above each of the steps.

I'm including a jpg of the diagram!

Yours Sincerely

John

Just thought about this for a minute... It's a) upside down and b) the 8000 one has the wrong comparator... a not uncommon event in my programming!

4299[/snapback]

Thank you already for your answer :thumbup: , But it's not really clear what your meaning, what are the possible cases in the case structure ?

I'm not sure I understand what your trying to tell me....

Hi,

I'm rather new to LV, and while I'm experimenting and developing with a FP RT system, I'm stuck now.

We're doing frequency measurements with a counter module (cFP-CTR-502), and in this context I need an algoritm that goes like this:

A variable (I'll call it Divisor) has a value of 1 for starters and depending on the value of another variable (let's call it Count), the divisor should be multiplied, or divided by a value:

count < 1000 => Divisor *3

count < 500 => Divisor *6

count < 250 => Divisor *9

Count >16000 => Divisor *9

Count >8000 => Divisor *6

Count >5300 => Divisor *3

Count between 1000 and 5300 => no alteration of Divisor.

I tried to write code in a formula node(dlr==Divisor and Cnt==Count):

float32 dlr=1;

while (dlr<6250)

{

if(cnt<250)

dlr=dlr*9;

else if (cnt<500)

dlr=dlr*6;

else if (cnt<1000)

dlr=dlr*3;

else if (cnt>5300)

dlr=dlr/3;

else if (cnt>8000)

dlr=dlr/6;

else if (cnt>16000)

dlr=dlr/9;

}

But this has two main problems:

-All of my CPU time is taken (alltough it's in a while loop with a 'Wait untill next ms multiple')

-'dlr' is allways reset to a value of 1, while it should be a more dynamic number

Can Anyone give me a hint on how I should work this out ?

thx