STL S7-400 (Text to STL)

Daynada · Oct 12, 2010

Can someone write this code consisely for me in STL?

If ("x amount of time" after rising edge M1.0) and (M1.1 = 0) then (output M1.2)

If ("y amount of time" after falling edge M1.0) and (M1.1 = 1) then (output M1.3)

Thanks for the time saver,

504bloke · Oct 12, 2010

Homework ?

Plenty here will do it

Do you do PayPal ?

TurpoUrpo · Oct 12, 2010

Hmm, looking at your post history it does not entirely look like homework.
So, this should do it (untested).

Code:

function_block fb100

var
    OnDelay1, OnDelay2 : SFB 4;
    EdgeMem1, EdgeMem2 : BOOL;
end_var

BEGIN

l t#5s; //load x time
t OnDelay1.PT;

l t#4s; //load y time
t OnDelay2.PT;

a m1.0:
fp EdgeMem1;
s OnDelay1.IN;

call #OnDelay1;

a OnDelay1.Q;
an m1.1;
s m1.2;

a OnDelay1.Q;
r OnDelay1.IN;

a m1.0;
fn EdgeMem2;
s OnDelay2.IN;

call #OnDelay2;

a OnDelay2.Q;
a m1.1;
s m1.3;

a OnDelay2.Q;
r OnDelay2.IN;

end_function_block

Daynada · Oct 12, 2010

Thanks for your help. Definitely not homework. I could do it in not-too-long. I would normally write it in ladder no problem, which I can do. But it was two fold... I'm not an expert in STL and I'm curious about different methods to the same problem. The way I would have wrote this would likely be different then you or whomever so I'm trying to feed off and learn from you folks. Thanks for your help and anyone else who may post.

L D[AR2P#0.0] · Oct 12, 2010

Here's an alternative implementation:

Code:

FUNCTION_BLOCK FB 1
TITLE =
VERSION : 0.1
VAR
  Delay1 : SFB 3;    
  Edge1 : BOOL ;    
  Delay2 : SFB 3;    
  Edge2 : BOOL ;    
END_VAR
BEGIN
NETWORK
TITLE =
      CALL #Delay1 (
           IN                       := M      1.0,
           PT                       := T#5S);
      A     #Delay1.Q; 
      FN    #Edge1; 
      AN    M      1.1; 
      S     M      1.2; 

      AN    M      1.0; 
      =     #Delay2.IN; 
      CALL #Delay2 (
           PT                       := T#4S);

      A     #Delay2.Q; 
      FN    #Edge2; 
      A     M      1.1; 
      S     M      1.3; 
END_FUNCTION_BLOCK

STL S7-400 (Text to STL)

Daynada

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504bloke

Lifetime Supporting Member

TurpoUrpo

Lifetime Supporting Member

Daynada

Member

L D[AR2P#0.0]

Lifetime Supporting Member

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