First release of the SARUtils library is the concater.
Quick example:
VAR
fbConcater : FB_Concater;
stringResult : STRING;
myInt : INT := 123;
myReal : REAL := 45.67;
myWord : WORD := 16#ABCD;
myString : STRING := 'example';
myBool : BOOL := TRUE;
END_VAR
fbConcater.Clear().V(myInt).L('/').V(myReal).L('/').V(myBool).L('/').V(myWord).L('/').V(myString);
stringResult := fbConcater.GetString(); // '123/45.67/TRUE/43981/example'