block Timer "Timer measuring the time from the time instant where the Boolean input became true"
extends Modelica.Blocks.Icons.PartialBooleanBlock;
Blocks.Interfaces.BooleanInput u "Connector of Boolean input signal"
annotation (Placement(transformation(extent = {
{-140, -20},
{-100, 20}})));
Blocks.Interfaces.RealOutput y "Connector of Real output signal"
annotation (Placement(transformation(extent = {
{100, -10},
{120, 10}})));
protected
discrete SI.Time entryTime "Time instant when u became true";
initial equation
pre(entryTime) = 0;
equation
when u then
entryTime = time;
end when;
y = if u then time - entryTime else 0;
annotation (
Icon(
coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}}),
graphics = {
Line(
points = {
{-90, -70},
{82, -70}},
color = {192, 192, 192}),
Line(
points = {
{-80, 68},
{-80, -80}},
color = {192, 192, 192}),
Polygon(
lineColor = {192, 192, 192},
fillColor = {192, 192, 192},
fillPattern = FillPattern.Solid,
points = {
{90, -70},
{68, -62},
{68, -78},
{90, -70}}),
Polygon(
lineColor = {192, 192, 192},
fillColor = {192, 192, 192},
fillPattern = FillPattern.Solid,
points = {
{-80, 90},
{-88, 68},
{-72, 68},
{-80, 90}}),
Line(
points = {
{-80, -70},
{-60, -70},
{-60, -26},
{38, -26},
{38, -70},
{66, -70}},
color = {255, 0, 255}),
Line(
points = {
{-80, 0},
{-62, 0},
{40, 90},
{40, 0},
{68, 0}},
color = {0, 0, 127})}),
Documentation(info = "<html>\n<p>When the Boolean input <strong>u</strong> becomes <strong>true</strong>, the timer starts\nand the output <strong>y</strong> is the time that has elapsed since <strong>u</strong> became <strong>true</strong>.\nWhen the input becomes <strong>false</strong>, the timer stops and the output is reset to zero.\n</p>\n\n<p>\n<img src=\"modelica://Modelica/Resources/Images/Blocks/Logical/Timer.png\"\n alt=\"Timer.png\">\n</p>\n\n</html>"));
end Timer;