S7 Any (pointer) parameter in FC

USDutchman · Feb 9, 2005

How can I access the data from an ANY parameter that is passed to an FC?

Input One: Source Type ANY
Input Two: Dest Type ANY

I used ANY variables before, but they were either local TEMP variables (Accesible in the Local L Memory area), or DB variables.
now I like to use them with an FC.

All I need to know is, how do I get to the 10 Bytes that make up the ANY parameter passed to the FC.

S7Guy · Feb 9, 2005

Is this what you mean:

You are passing a pointer into an FC. Let's call it "SamplePointer".

When you open the FC, in the declaration table it will be an input variable.

To look at the contents, code this:

L P##SamplePointer
LAR1
L W[AR1,P#0.0]
L W[AR1,P#2.0]
L W[AR1,P#4.0]
L D[AR1,P#6.0]

This will give you all of the components of the pointer.

USDutchman · Feb 10, 2005

Thanks

Thanks, that worked!
I tried something similar myself, but got the syntax wrong.

fh43bktdh · Jan 8, 2008

Ask About Ar2 In My Content?

T #i;
A80a: L #i;
L 3;
<=I ;
JCN A809;
L #i;
ITD ;
L L#2;
+D ;
L L#8;
*D ;
TAR2 ;
+D ;
LAR1 ;
L DIB [AR1,P#64.0];
L #DB_SCALE;
T LW 56;
TAK ;
T LB 55;
TAK ;
L #ti_ADR;
L #i;
+I ;
ITD ;
L L#8;
*D ;
L LB 55;
OPN DB [LW 56];
TAK ;
LAR1 ;
TAK ;
L DBB [AR1,P#0.0];
<>I ;
JCN A80c;
SET ;
= L 30.0;
= #sb_APPL_ID_ERR;
A80c: L #i;
L 1;
+I ;
T #i;
JU A80a;
I want to change to SCL! who help me? please
order TAR2 mean what? why use AR2 at that?

fh43bktdh · Jan 8, 2008

Ask About Ar2 In My Content?

L 0;
T #i;
A80a: L #i;
L 3;
<=I ;
JCN A809;
L #i;
ITD ;
L L#2;
+D ;
L L#8;
*D ;
TAR2 ;
+D ;
LAR1 ;
L DIB [AR1,P#64.0];
L #DB_SCALE;
T LW 56;
TAK ;
T LB 55;
TAK ;
L #ti_ADR;
L #i;
+I ;
ITD ;
L L#8;
*D ;
L LB 55;
OPN DB [LW 56];
TAK ;
LAR1 ;
TAK ;
L DBB [AR1,P#0.0];
<>I ;
JCN A80c;
SET ;
= L 30.0;
= #sb_APPL_ID_ERR;
A80c: L #i;
L 1;
+I ;
T #i;
JU A80a;
I want to change to SCL! who help me? please
order TAR2 mean what? why use AR2 at that?

L D[AR2P#0.0] · Jan 9, 2008

This should be in a new thread but,

The STL you have posted uses the TAR2 instruction as part of the processing to access an element of a static array.
For example, here is a small snippet of SCL

Code:

FUNCTION_BLOCK FB999

VAR_INPUT
DB_Scale:BLOCK_DB;
END_VAR

VAR_IN_OUT
sb_APPL_ID_ERR:BOOL;
END_VAR

VAR_OUTPUT
 // Output Parameters
END_VAR

VAR_TEMP
  // Temporary Variables
byData:BYTE;
END_VAR
VAR
  // Static Variables
  i:INT;
  Scale:ARRAY[1..10,1..2] OF BYTE;
END_VAR
FOR i:=0 TO 3 DO
	IF scale[1,i] <> byData THEN sb_APPL_ID_ERR:=0; END_IF;	
END_FOR;   
END_FUNCTION_BLOCK

which produces this STL:

Code:

	  SET   
	  SAVE  
	  =	 L	  1.1
	  L	 0
	  T	 #i
A7d0: L	 #i
	  L	 3
	  <=I   
	  JCN   A7d1
	  L	 #i
	  ITD   
	  L	 L#-1
	  +D	
	  L	 L#8
	  *D	
	  TAR2  
	  +D	
	  LAR1  
	  L	 DIB [AR1,P#6.0]
	  L	 #byData
	  <>I   
	  JCN   A7d2
	  CLR   
	  =	 #sb_APPL_ID_ERR
A7d2: L	 #i
	  L	 1
	  +I	
	  T	 #i
	  JU	A7d0
A7d1: CLR   
	  A	 L	  1.1
	  SAVE  
	  BE

With a bit of trial and error you may be able to reverse engineer your STL to produce the correct SCL for your block. Good luck.

S7 Any (pointer) parameter in FC

USDutchman

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S7Guy

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USDutchman

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fh43bktdh

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fh43bktdh

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L D[AR2P#0.0]

Lifetime Supporting Member

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