RealPassThrough

model RealPassThrough "Pass a Real signal through without modification"
    extends Modelica.Blocks.Interfaces.SISO;
equation
    y = u;

    annotation (
        Icon(
            coordinateSystem(
                preserveAspectRatio = true,
                extent = {
                    {-100, -100}, 
                    {100, 100}}),
            graphics = {
                Line(
                    points = {
                        {-100, 0}, 
                        {100, 0}},
                    color = {0, 0, 127})}),
        Documentation(info = "<html>\n<p>\nPasses a Real signal through without modification.  Enables signals to be read out of one bus, have their name changed and be sent back to a bus.\n</p>\n</html>"));
end RealPassThrough;