POU Variable RETAIN

[macbahi]

Hello,

I am using POU with structured text ST as you see in my example.
I do average of some numbers.
Like you see when I use Retain Variable I have problem as you see in picture.

Please could you tell me where the problem

Thanks for your help

With best regards

[FluidPowerTom]

You've got a colon instead of a semicolon at the end of your first RETAIN variable declaration.

[macbahi]

Hi Tom,

Tank you very much to replay me.
But I didn't understand.  Please could you give more detail. Or Correct example.
I am not familiarized with POU ST

Thanks in advance.

With best regards

[macbahi]

HI Tom,

Sorry Tom It's ok but now I have another problem. Please see image.

My function is working without VAR RETAIN but the result is not good.
As example When NbIncrement_Scan =1 the output is equal to input. It's Ok.

But when My NbIncrement_Scan est >1 then the output is equal to zero.

That's why I tried to use VAR RETAIN.

I hope you understand my problem.

Thanks in advance for your help

Best regards

[acmall]

If you want to keep the valve of NbIncrument and CounteurIncrement between calls use a Function Block instead of a Function.

A Function does not store the valve of it's variables between calls so each time the function is called NbIncrument and CounteurIncrement will always be initialised to 0.  A Function Block will store the value variables.

[macbahi]

Hi!

Thank you Sir.

With best regards

[macbahi]

Hi acmall,

I do it but still the same problem. NbIncrument and CounteurIncrement are also initialized to 0 every call.

Thanks
Best regards

[acmall]

Can you post your code as it is now?

[macbahi]

Hi Acmall,

Sorry to be late I was in vacancy.

It's ok now. It was mistake in call function.

Thank you very much.

With best regards