Hello Everyone,

I need to generate random value from 3.0 to 4.0 and 0.9 to 1.6 in the interval of 1s. I need this logic for testing purpose.

I used tag simulator to generate this, it is working fine. But the problem is every time I have to start it manually. Let say if my pump is on then I need to generate this random value. When the pump is off then it should not give any value.

I found multiple threads  on this, I tried but not successful. 

I took the project from the below link

Tool collection of functions for bit, number and mathematical operations - ID: 29851674 - Industry Support Siemens  but here I am getting random values only from 0 to X 

STL/FBD/LAD solution will be helpful for me

Thanks

samkcr

Hello Everyone,

I need to generate random value from 3.0 to 4.0 and 0.9 to 1.6 in the interval of 1s. I need this logic for testing purpose.

I used tag simulator to generate this, it is working fine. But the problem is every time I have to start it manually. Let say if my pump is on then I need to generate this random value. When the pump is off then it should not give any value.

I found multiple threads  on this, I tried but not successful. 

I took the project from the below link

Tool collection of functions for bit, number and mathematical operations - ID: 29851674 - Industry Support Siemens  but here I am getting random values only from 0 to X 

STL/FBD/LAD solution will be helpful for me

Thanks

Hello.

You are not stating which PLC & software you are using. That is a hinderance.

The resource you found is already useful. Write a little code that transforms the value you already have to the range you need it to be. The resource you have is a value between -32768 and +32767.

Another resource: Library of general functions (LGF) for SIMATIC STEP 7 (TIA Portal) and SIMATIC S7-1200 / S7-1500 :: LGF_Random_Real()

~

Hi

Thanks for the reply

I am using Step7 and PLCSIM until the real hardware arrival.  With the example program I can change the High limit value.. Default it is programmed with range 0-3000 instead of 3000 I can change any values. This is fine as marked in the image

But my concern is low limit.. In that program I am not sure where to change the low limit.

I also tried using a scaling block, for example using the program 0-10 i am simulating and I scaled it to my desired range 30-40 (3.0 - 4.0)  but not successful

Let me know anyone who really worked on this example project