Saturation Function
Owning Palette: Nonlinear Systems Functions
Installed With: Control Design and Simulation Module
Limits the valid range of a signal.
| Dialog Box Options |
| Block Diagram Inputs |
| Block Diagram Outputs |
 Place on the block diagram |
Find on the Functions palette |
Dialog Box Options
| Parameter | Description |
|---|---|
| Polymorphic instance | Specifies whether this function is Scalar or Vector. The default value is Scalar. |
| Parameters | Lists all the parameters associated with this function. Select a parameter from this list to configure the parameter. When you select a parameter, the parameter and its associated Parameter source control appear in the Parameter Information section of the configuration dialog box. |
| Preview | Displays a graphical preview, if available, of the function output or configuration. |
| Parameter Information | Contains the parameters you can configure for this function. You must select a parameter from the Parameters list to make that parameter and its associated Parameter source control visible in the Parameter Information section of the configuration dialog box. |
| Parameter source | Specifies whether you configure this parameter using the Configuration Dialog Box or a Terminal on the simulation diagram. The default value is Configuration Dialog Box. If you select Terminal, LabVIEW displays an input for that parameter on the simulation diagram, and you can wire values to that input to configure this function programmatically. If you select Configuration Dialog Box, LabVIEW removes that input from the simulation diagram. You then must set the value for this parameter inside the configuration dialog box. |
| lower limit | Specifies the minimum value of the output. If the value of the input is less than the value of the lower limit, this function returns the value of the lower limit. The default value of the lower limit is –5. The value of this parameter must be less than or equal to the value of the upper limit parameter, or LabVIEW returns an error. |
| upper limit | Specifies the maximum value of the output. If the value of the input is greater than the value of the upper limit, this function returns the value of the upper limit. The default value of the upper limit is 5. The value of this parameter must be greater than or equal to the value of the lower limit parameter, or LabVIEW returns an error. |
Block Diagram Inputs
| Parameter | Description |
|---|---|
| lower limit | Specifies the minimum value of the output. If the value of the input is less than the value of the lower limit, this function returns the value of the lower limit. The default value of the lower limit is –5. The value of this parameter must be less than or equal to the value of the upper limit parameter, or LabVIEW returns an error. |
| upper limit | Specifies the maximum value of the output. If the value of the input is greater than the value of the upper limit, this function returns the value of the upper limit. The default value of the upper limit is 5. The value of this parameter must be greater than or equal to the value of the lower limit parameter, or LabVIEW returns an error. |
| input | Specifies the signal to which you want to apply the function. |
Block Diagram Outputs
| Parameter | Description |
|---|---|
| output | Returns the signal that results from applying the function to the input signal. |
Saturation Details
The following equations define the output of this function.
| where | u is the input |
| y is the output |
Feedthrough Behavior
All input/output pairs of this function have direct feedthrough behavior.
Example
Refer to the SimEx saturation VI in the labview\examples\Control and Simulation\Simulation\Nonlinear directory for an example of using the Saturation VI.
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