```pascal
FUNCTION "MaxCarboCO2 Vol" : Real
{ S7_Optimized_Access := 'FALSE' }
AUTHOR : 'Author'
FAMILY : 'Function'
NAME : 'Name'
VERSION : 1.0
   VAR_INPUT 
      i_Press : Real;
   END_VAR

   VAR_IN_OUT 
      i_Temp : Real;
   END_VAR

   VAR_TEMP 
      mAbsTemp : Real;
      mAux : Real;
   END_VAR


BEGIN
	
	  
	IF #i_Temp <= 0 THEN 
	    (* classic code: #i_Temp := 12.0 ;*)
	    #i_Temp := REAL#12.0 ;
	END_IF;
	
	#mAbsTemp := #i_Temp + "Blender_Constants".gZeroAbsolute ;
	  
	(* classic code: IF (0.03275 * #mAbsTemp - 7.9567) <> 0 AND #i_Press <> 0 AND (0.000261 + #mAux * (1 + 1.0332 / #i_Press)) <> 0 THEN*)
	IF (REAL#0.03275 * #mAbsTemp - REAL#7.9567) <> 0 AND #i_Press <> 0 AND (REAL#0.000261 + #mAux * (1 + REAL#1.0332 / #i_Press)) <> 0 THEN
	    (* classic code: #mAux := (0.01898 - 0.0000476 * #mAbsTemp) / (0.03275 * #mAbsTemp - 7.9567) ;*)
	    #mAux := (REAL#0.01898 - REAL#0.0000476 * #mAbsTemp) / (REAL#0.03275 * #mAbsTemp - REAL#7.9567) ;
	    (* classic code: #"MaxCarboCO2 Vol"  := #i_Press * #mAbsTemp / 1.0332 * (0.000261 + #mAux * (1 + 1.0332 / #i_Press)) ;*)
	    #"MaxCarboCO2 Vol"  := #i_Press * #mAbsTemp / REAL#1.0332 * (REAL#0.000261 + #mAux * (1 + REAL#1.0332 / #i_Press)) ;
	ELSE
	    #"MaxCarboCO2 Vol"  := -1 ;
	END_IF;  
	
	
END_FUNCTION


```