block MultiSwitch "Set Real expression that is associated with the first active input signal"
input Real expr[nu] = fill(0, nu) "y = if u[i] then expr[i] else y_default (time varying)"
annotation (Dialog);
parameter Real y_default = 0 "Default value of output y if all u[i] = false";
parameter Integer nu(min = 0) = 0 "Number of input connections"
annotation (
Dialog(connectorSizing = true),
HideResult = true);
parameter Integer precision(min = 0) = 3 "Number of significant digits to be shown in dynamic diagram layer for y"
annotation (Dialog(tab = "Advanced"));
Modelica.Blocks.Interfaces.BooleanVectorInput u[nu] "Set y = expr[i], if u[i] = true"
annotation (Placement(transformation(extent = {
{-110, 30},
{-90, -30}})));
Modelica.Blocks.Interfaces.RealOutput y "Output depending on expression"
annotation (Placement(transformation(extent = {
{300, -10},
{320, 10}})));
protected
Integer firstActiveIndex;
initial equation
pre(u) = fill(false, nu);
equation
y = if firstActiveIndex == 0 then y_default else expr[firstActiveIndex];
firstActiveIndex = Modelica.Math.BooleanVectors.firstTrueIndex(u);
annotation (
defaultComponentName = "multiSwitch1",
Icon(
coordinateSystem(
preserveAspectRatio = false,
extent = {
{-100, -100},
{300, 100}}),
graphics = {
Rectangle(
extent = {
{-100, -51},
{300, 50}},
lineThickness = 5,
fillColor = {170, 213, 255},
fillPattern = FillPattern.Solid,
borderPattern = BorderPattern.Raised),
Text(
extent = {
{-86, 16},
{295, -17}},
textString = "%expr"),
Text(
extent = {
{310, -25},
{410, -45}},
textString = DynamicSelect(" ", String(y, minimumLength = 1, significantDigits = precision))),
Text(
extent = {
{-100, -60},
{300, -90}},
textString = "else: %y_default"),
Text(
extent = {
{-100, 100},
{300, 60}},
textString = "%name",
lineColor = {0, 0, 255})}),
Documentation(info = "<html>\n<p>\nThis block has a vector of Boolean input signals u[nu] and a vector of\n(time varying) Real expressions expr[nu]. The output signal y is\nset to expr[i], if i is the first element in the input vector u that is true. If all input signals are\nfalse, y is set to parameter \"y_default\".\n</p>\n\n<blockquote><pre>\n // Conceptual equation (not valid Modelica)\n i = 'first element of u[:] that is true';\n y = <strong>if</strong> i==0 <strong>then</strong> y_default <strong>else</strong> expr[i];\n</pre></blockquote>\n\n<p>\nThe input connector is a vector of Boolean input signals.\nWhen a connection line is drawn, the dimension of the input\nvector is enlarged by one and the connection is automatically\nconnected to this new free index (thanks to the\nconnectorSizing annotation).\n</p>\n\n<p>\nThe usage is demonstrated, e.g., in example\n<a href=\"modelica://Modelica.Blocks.Examples.RealNetwork1\">Modelica.Blocks.Examples.RealNetwork1</a>.\n</p>\n\n</html>"));
end MultiSwitch;