Step

1 Block Signal Connectors

2 Time From Modelica.SIunits

3 Signal Block Components

4 Step

The class Step includes a number of advanced features such as variable length arrays, conditional expressions in parameter declarations, and a repetitive equation structure in the form of a for-equation defining the vector outPort.signal inherited from the base class MO, a Multiple Output continuous control block.

block Step                   "Generate step signals of type Real"
  parameter Real   height[:] = {1}      "Heights of steps";
  parameter Real   offset[:] = {0}      "Offset of output signals";
  parameter Time startTime[:] = {0}     "Output = offset for time < startTime";

extends MO(final nout =   max([size(height, 1);
                size(offset, 1);
                size(startTime, 1)]) );
protected
  parameter Real p_height[nout] =
          (if size(height, 1) == 1 then
            ones(nout)*height[1]
          else
            height);
  parameter Real p_offset[nout] =
          (if size(offset, 1) == 1 then
            ones(nout)*offset[1]
          else
            offset);
  parameter Time p_startTime[nout] =
          (if size(startTime, 1) == 1 then
            ones(nout)*startTime[1]
          else
            startTime);

equation
  for i in 1:nout loop                  // A regular equation structure
    outPort.signal[i] = p_offset[i] +
              (if time < p_startTime[i] then 0 else p_height[i]);
  end for;
end Step;                        // From Modelica.Blocks.Sources

Step

1 Block Signal Connectors

2 Time From Modelica.SIunits

3 Signal Block Components

4 Step

5 Simulation of Step