Reversing input from AI sensor

Hi

Im quite new to programming in TIA and Im sur there is an easy solution to my problem.

Im going to meassure vacuum in a tank, and when the vacuum inside the tank is at 0, the sensor gives max output (27304), and as the tank gets more vacuum the value decreases towards 0. Ive made a working scaling function in a block wich scales 0-27304 to 0-100. Is there any way I can reverse the input value? So when there are no vacuum it shows 0, and as the vacuum pump sucks out more air, the value increases towards 27304?

Im adding a picture to show my scaling. Be kind with me!! The picture is taken when there is no vacuu, in the tank.

Hello.

I suggest to you to use a new tag NORM_X.OUT. 
Let us assume "realNormaliseert".
In-between NORM_X and SCALE_X have a subtract (SUB) block so that

"realNormaliseert" := 1.0 - "realNormaliseert"

Now feed "realNormaliseert" into SCALE_X.

Hello again. Seems to be working, but now the output value is negative. Now 0 is 0, and 27304 is -100.

Is there any way to convert this to a positive value again?

morten.sagvang

Seems to be working, but ...

... it is not working. 

Next time when you get something almost working, show the screen-shot. Then we can find out what the "almost" is.

Anyway, delete "SUB" block and swap values at MIN and MAX inputs of SCALE_X.

@Jacek: Which software are you using? My result is not what you get.

@Morten: Be careful how you use the SUB block.

Picture attached for review.