sub program multi output value

[mos89]

hi ,
i would like to write a sub-program with multible outputs values, 

when i compile my straton program hi have an error, Variable, constant expression or function call expected

[anthony.burille]

Hi,

If you have this error, I think this is because you are trying to do it in an ST program.
If you want to recover multiple outputs on a Sub-Program, you have to use the same syntax as if it was an UDFB, even if a sub-program has no instance name.
The best is with an example.

Let's say you have a sub-program with this structure:
  MySP:
    IN_1 : IN
    IN_2 : IN
    OUT_1 : OUT
    OUT_2 : OUT

Then in your ST program you must do something like that
  MySP ( Input_1, Input_2 );
  Output_1 := MySP.OUT_1;
  Output_2 := MySP.OUT_2;

This should work

[mos89]

yes it is an ST sub program, you mean i need to define it as UDFB?

[anthony.burille]

yes it is an ST sub program, you mean i need to define it as UDFB?

Ah no, you just have to use the same syntax.
I mean, normally, with a Sub-Program with only one output you can do something like:
    Output_1 := MySP ( Input_1, Input_2 );

But with several outputs you can't.
So you have to do "like if it was an UDFB".
For example, with a counter:
    Inst_CTU(...);
    CtuIsFull := Inst_CTU.Q;
    CtuValue := Inst_CTU.CV;

So for a sub-program, with, for example, two outputs called 'OUT_1' and 'OUT_2' (inside of the Sub-Program), you have to do something like:
    MySP ( Input_1, Input_2 );
    Output_1 := MySP.OUT_1;
    Output_2 := MySP.OUT_2;

But you can keep it as a sub-program
(just take care about not calling many times the sub-program at different places, because when recovering the outputs values, as it is not instanciated, there can be some bad values)