CD Select IO from Model VI

Control Design VI and Function

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CD Select IO from Model VI

Owning Palette: Model Reduction VIs

Installed With: Control Design and Simulation Module

Selects the inputs, outputs, and/or states that you want to keep from the original system model. If you want to remove inputs, outputs, or states from the original system model, use the CD Remove IO from Model VI. The data type you wire to the State-Space Model input determines the polymorphic instance to use.

Note  If you specify a value of [–1] for the States, Inputs, or Outputs parameter, this VI selects all model states/inputs/outputs, respectively.

Details  

Use the pull-down menu to select an instance of this VI.

 Place on the block diagram  Find on the Functions palette

CD Select IO from State-Space Model

Allow Reorder is TRUE if you want this VI to reorder the model states/inputs/outputs in the order you select them. Allow Reorder is FALSE if you do not want to reorder the states/inputs/outputs. The default value is FALSE.

For example, consider a model with three outputs in the following order:

Output NumberIndex Number
10
21
32


You specify a value of [1 0] for the Outputs parameter. If Allow Reorder? is FALSE, the Selected Model contains the first two outputs in the original order. However, if Allow Reorder? is TRUE, the Selected Model contains the first two outputs in the following order:

Output NumberIndex Number
11
20
States is the index number of the states you want to select from the State-Space Model. The index is zero-based. If you wire a value of –1 to this parameter, this VI selects all model states.
State-Space Model contains a mathematical representation of and information about the system of which this VI keeps the states, inputs and/or outputs in the resulting model.
Inputs specifies the index numbers of the inputs you want to select from the system model. The index is zero-based. If you wire a value of –1 to this parameter, this VI selects all model inputs.
Outputs specifies the index numbers of the outputs you want to select from the system model. The index is zero-based. If you wire a value of –1 to this parameter, this VI selects all model outputs.
error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
Selected Model is the resulting system model with only the states, inputs, or outputs you selected. To access and modify the data in the model, use the Model Information VIs.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

CD Select IO from Transfer Function Model

Allow Reorder is TRUE if you want this VI to reorder the model states/inputs/outputs in the order you select them. Allow Reorder is FALSE if you do not want to reorder the states/inputs/outputs. The default value is FALSE.

For example, consider a model with three outputs in the following order:

Output NumberIndex Number
10
21
32


You specify a value of [1 0] for the Outputs parameter. If Allow Reorder? is FALSE, the Selected Model contains the first two outputs in the original order. However, if Allow Reorder? is TRUE, the Selected Model contains the first two outputs in the following order:

Output NumberIndex Number
11
20
Transfer Function Model contains a mathematical representation of and information about the system in which this VI keeps the inputs and/or outputs in the resulting model.
Inputs specifies the index numbers of the inputs you want to select from the system model. The index is zero-based. If you wire a value of –1 to this parameter, this VI selects all model inputs.
Outputs specifies the index numbers of the outputs you want to select from the system model. The index is zero-based. If you wire a value of –1 to this parameter, this VI selects all model outputs.
error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
Selected Model is the resulting system model with only the states, inputs, or outputs you selected. To access and modify the data in the model, use the Model Information VIs.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

CD Select IO from Zero-Pole-Gain Model

Allow Reorder is TRUE if you want this VI to reorder the model states/inputs/outputs in the order you select them. Allow Reorder is FALSE if you do not want to reorder the states/inputs/outputs. The default value is FALSE.

For example, consider a model with three outputs in the following order:

Output NumberIndex Number
10
21
32


You specify a value of [1 0] for the Outputs parameter. If Allow Reorder? is FALSE, the Selected Model contains the first two outputs in the original order. However, if Allow Reorder? is TRUE, the Selected Model contains the first two outputs in the following order:

Output NumberIndex Number
11
20
Zero-Pole-Gain Model contains a mathematical representation of and information about the system in which this VI keeps the inputs and/or outputs in the resulting model.
Inputs specifies the index numbers of the inputs you want to select from the system model. The index is zero-based. If you wire a value of –1 to this parameter, this VI selects all model inputs.
Outputs specifies the index numbers of the outputs you want to select from the system model. The index is zero-based. If you wire a value of –1 to this parameter, this VI selects all model outputs.
error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
Selected Model is the resulting system model with only the states, inputs, or outputs you selected. To access and modify the data in the model, use the Model Information VIs.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

CD Select IO from Model Details

This VI supports delays. Refer to the LabVIEW Control Design User Manual for more information about delays.

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