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FMU: Input at an inner block
FMU: Input at an inner block
Jul-02-20 11:04:10
I have a model, create an FMU out of it, and want to import it in to python.
Having inputs on the first canvas works, and transferring them to the blocks which are used works, too.
Because of the architecture of the python code, i need to have the prefix for the inputs as for the rest of the block.
I made a minimal example:
Code:
package testi
model source
Modelica.Electrical.Analog.Sources.SignalVoltage signalVoltage annotation(
Placement(visible = true, transformation(origin = {0, 36}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
Modelica.Electrical.Analog.Basic.Ground ground annotation(
Placement(visible = true, transformation(origin = {48, 22}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
Modelica.Electrical.Analog.Interfaces.Pin pin annotation(
Placement(visible = true, transformation(origin = {100, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0), iconTransformation(origin = {100, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
Modelica.Blocks.Interfaces.RealInput u annotation(
Placement(visible = true, transformation(origin = {0, 108}, extent = {{-20, -20}, {20, 20}}, rotation = -90), iconTransformation(origin = {0, 108}, extent = {{-20, -20}, {20, 20}}, rotation = -90)));
equation
connect(signalVoltage.n, ground.p) annotation(
Line(points = {{10, 36}, {48, 36}, {48, 32}}, color = {0, 0, 255}));
connect(signalVoltage.p, pin) annotation(
Line(points = {{-10, 36}, {-20, 36}, {-20, 0}, {100, 0}, {100, 0}}, color = {0, 0, 255}));
connect(signalVoltage.v, u) annotation(
Line(points = {{0, 48}, {0, 48}, {0, 108}, {0, 108}}, color = {0, 0, 127}));
end source;
model base
testi.source source1 annotation(
Placement(visible = true, transformation(origin = {-42, 40}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
testi.measurement measurement1 annotation(
Placement(visible = true, transformation(origin = {44, 40}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
equation
connect(source1.pin, measurement1.pin) annotation(
Line(points = {{-32, 40}, {34, 40}}, color = {0, 0, 255}));
end base;
model measurement
Modelica.Electrical.Analog.Basic.Resistor resistor annotation(
Placement(visible = true, transformation(origin = {-24, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
Modelica.Electrical.Analog.Interfaces.Pin pin annotation(
Placement(visible = true, transformation(origin = {-100, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0), iconTransformation(origin = {-100, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
Modelica.Electrical.Analog.Basic.Ground ground annotation(
Placement(visible = true, transformation(origin = {30, -28}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
equation
connect(pin, resistor.p) annotation(
Line(points = {{-100, 0}, {-34, 0}}, color = {0, 0, 255}));
connect(resistor.n, ground.p) annotation(
Line(points = {{-14, 0}, {30, 0}, {30, -18}, {30, -18}}, color = {0, 0, 255}));
end measurement;
annotation(
uses(Modelica(version = "3.2.3")));
end testi;
Trying to create the FMU causes the error: Undetermined equation system: 23 equations, 24 variables, although i would provide the input "source.u" via python. If I create an additional Input directly in the base model and connect it to the input of the source, it works, but then i do not have the same prefix "source.u" in my python code, which i would really like to have.
Does anyone know a way to solve this problem?
Thank you
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