This function performs a proportional integral (i.e. the output is the sum of proportional and integral gains of the input signal). Either trapezoidal or rectangular integration may be used for time domain computation of the integral function.
Interpolation Compatibility may be enabled provided that Integration Method | Rectangular is selected. When enabled, the Interpolated Time Tag and the polarity of the signal will be considered when calculating the exact integral for that particular time step.
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Name for Identification |
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Optional text parameter for identification of the component. |
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Proportional Gain |
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REAL |
Variable |
Proportional gain factor |
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Integral Time Constant |
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REAL |
Variable |
Integral time constant [s] |
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Maximum |
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REAL |
Variable |
Limits the output to this maximum limit |
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Minimum |
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REAL |
Variable |
Limits the output to this minimum limit |
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Initial Output |
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REAL |
Constant |
The output at time t = 0.0 |
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Integration Method |
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Choice |
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Select Trapezoidal or Rectangular.
Note that trapezoidal integration should be used whenever possible as it is never unstable. However, if the derivative of the input waveform is not continuous (i.e. dx/dt is infinity at some points) you can get better accuracy with rectangular integration with Interpolation Compatibility enabled (provided the input waveform is interpolation compatible). See Interpolation Compatible Components. |
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Interpolation Compatibility |
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Choice |
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Selected Enabled or Disabled. See Description for more details. This parameter is enabled only if Integration Method | Rectangular is selected. |