This component is a resettable integrator with non windup limits. The integrator is one of the basic building blocks of control system functions, and may be set to use either trapezoidal or rectangular integration methods. The output can be reset to a predefined value by applying a non-zero integer at the Clear input. A default value of 1.0 second is assumed for the time constant if it's absolute value is less than 10-20.
Interpolation Compatibility
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. Interpolation compatibility may also be enabled specifically on the Clear input of this device. If so, the interpolated information is used to determine the exact time of reset, and hence calculate the exact output value at the next time step following the reset.
If Integration Method | Rectangular is selected without enabling Interpolated Input, then the rectangular step boundary is taken at the middle of the time step. This would give the same result as trapezoidal integration for analog type inputs. If the user wishes to adjust the rectangular boundary to a different location other than the middle of the time step, then user can enable Interpolated Input and make the second element of the input (i.e. the Interpolated Time Tag) a value in the rage 0.0 <= x <= DELT.
|
More: |