public void Load(XElement xele)
        {
            models.Clear();
            IEnumerable <XElement> xeles_model = xele.Elements("ModbusTableModel");

            foreach (XElement xele_model in xeles_model)
            {
                ModbusTableModel model = new ModbusTableModel();
                model.Load(xele_model);
                models.Add(model);
            }
            Current = models.FirstOrDefault();
            ModelChanged(this, new RoutedEventArgs());
        }