S7-300 STL array

mass89

Member
M
Join Date
Oct 2017
Location
England
Posts
77
Hi,
I am useless at STL and not fortunate enough to have SCL.
I am trying to do the following;
MW1 := 6
MW2 := 400
DB100.DBW[MW1] := MW2

So store value in MW2 in a dynamic location, example above would be DB100.DBW6 = 400

Many Thanks,
 
MW1 and MW2 overlap so don't use them as an example. Here's the source code for an FC that will write data to a DB


Code: 
FUNCTION FC 1 : VOID
TITLE =
VERSION : 0.1


VAR_INPUT
  iOffsetinBytes : INT ;    
  iValue : INT ;    
  iDB : INT ;    
END_VAR
VAR_TEMP
  DataBlock : INT ;    
END_VAR
BEGIN
NETWORK
TITLE =

      L     #iOffsetinBytes; 
      SLD   3; 
      L     P#DBX 0.0; 
      +D    ; 
      LAR1  ; 
      L     #iDB; 
      T     #DataBlock; 
      OPN   DB [#DataBlock]; 
      L     #iValue; 
      T     W [AR1,P#0.0]; 


END_FUNCTION
 

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