用1511试了下，把

  FOR Index:= 0 TO Length-1 BY 1 DO       
        Send_DB.Buffer[Index] := STRING_TO_CHAR(IN:=Temp_String);
        Temp_String := DELETE(IN:=Temp_String, L:=1, P:=1);   
   END_FOR;

改成

  FOR Index:= 0 TO Length-1 BY 1 DO       
        Send_DB.Buffer[Index] := STRING_TO_CHAR(IN := MID(IN := #Temp_string, L := 1, P := (#Index + 1)));    
  END_FOR;

PLC的扫描周期短不少，230长的字符串，扫描周期差了大概6ms，为啥呢，MID比DELETE快？