statement list STEP 7

roussey · May 28, 2012

Hello,

I am new on STL programming and there is a syntax that I don't understand, exemple:

A #F_P_OUT_OF_RANGE
NOT
A L 0.2

JCN A7ec

I understood that L 0.2 is an aux variable. But it is not defined anywhere, why?

Thank you

KalleOlsen · May 28, 2012

Hi!

We must see more of the code to be able to help. The variable declaration also.

Kalle

roussey · May 28, 2012

This L 0.2 variable is not defined anywhere, this is my doubt.

KalleOlsen · May 28, 2012

Okay, no more info. Then it's your choice to live in this doubt.

Have a good life!

Kalle

roussey · May 28, 2012

KalleOlsen said:
Okay, no more info. Then it's your choice to live in this doubt.

Have a good life!

Kalle

Can you pass me your email?

wimpiesplc · May 28, 2012

LOL he really wants you

L D[AR2P#0.0] · May 28, 2012

The L is the temp data area allocated to blocks each time they are run. The data area can be allocated named variables (bools, ints etc.) or the area can be accessed using the absolute address as in your example.

L D[AR2P#0.0] · May 28, 2012

The code in question was most likely produced by the SCL compiler (the labels point that way)

e.g. the following SCL code

Code:

FUNCTION_BLOCK fb909
VAR
    C:INT;
    F_P_OUT_OF_RANGE:BOOL;
END_VAR
VAR_TEMP
    wData:BYTE;
    bData AT wdata:ARRAY[1..8] OF BOOL;
    end_var
    IF NOT F_P_OUT_OF_RANGE AND bData[3] THEN 
    c:=1;
    END_IF;    
END_FUNCTION_BLOCK

generates the STL as follows:

Code:

      SET   
      SAVE  
      =     L      1.1
[COLOR=Red]      A     #F_P_OUT_OF_RANGE
      NOT   
      A     L      0.2
      JCN   A7d0[/COLOR]
      L     1
      T     #C
A7d0: CLR   
      A     L      1.1
      SAVE  
      BE

statement list STEP 7

roussey

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roussey

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KalleOlsen

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roussey

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wimpiesplc

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L D[AR2P#0.0]

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L D[AR2P#0.0]

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