CD Series VI

Owning Palette: Model Interconnection VIs

Requires: Control Design and Simulation Module

Connects two linear models in series. The system models either must be continuous-time models or must have the same sampling time if they are discrete-time models. Wire data to the Model 1 and Model 2 inputs to determine the polymorphic instance to use or manually select the instance.

Details  

CD Series State-Space and State-Space

	Model 1 is the first model this VI uses to create the Connected Model.
	Model 2 is the second model this VI uses to create the Connected Model.
	Connections specifies which outputs of the first model this VI connects to which inputs of the second model. Output Model 1 specifies the index of the output of Model 1 to connect to the input of Model 2 corresponding to Input Model 2. Input Model 2 specifies the index of the input of Model 2 to connect to the output of Model 1 corresponding to Output Model 1.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Delay Adjustment Settings approximates the delay that this VI eliminated by connecting the models. With continuous systems, the approximation is based on Pade approximation, while discrete systems increase the system order to account for delay. If you specify FALSE for the Adjust Model for Delay parameter, this VI does not make any approximation for any delay. Adjust Model for Delay specifies if you want to adjust the model for delay. The default is FALSE, which means you do not want to adjust the model for delay. Pade Approximation Order specifies the Pade approximation order. The default is 2.
	Series Model represents the closed-loop system that results from this VI connecting Model 1 and Model 2 according to the Connections specification. When the two input models are different model types, this VI determines the model type of the resulting model by the following model hierarchy: state-space>transfer function>zero-pole-gain. For example, if one input is a state-space model and the other is a zero-pole-gain model, the resulting model is a state-space model. To access and modify the data in the model, use the Model Information VIs.
	error out contains error information. This output provides standard error out functionality.

CD Series State-Space and Transfer Function

This VI converts transfer function models into state-space models before connecting the models.

	Model 1 is the first model this VI uses to create the Connected Model.
	Model 2 is the second model this VI uses to create the Connected Model.
	Connections specifies which outputs of the first model this VI connects to which inputs of the second model. Output Model 1 specifies the index of the output of Model 1 to connect to the input of Model 2 corresponding to Input Model 2. Input Model 2 specifies the index of the input of Model 2 to connect to the output of Model 1 corresponding to Output Model 1.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Delay Adjustment Settings approximates the delay that this VI eliminated by connecting the models. With continuous systems, the approximation is based on Pade approximation, while discrete systems increase the system order to account for delay. If you specify FALSE for the Adjust Model for Delay parameter, this VI does not make any approximation for any delay. Adjust Model for Delay specifies if you want to adjust the model for delay. The default is FALSE, which means you do not want to adjust the model for delay. Pade Approximation Order specifies the Pade approximation order. The default is 2.
	Series Model represents the closed-loop system that results from this VI connecting Model 1 and Model 2 according to the Connections specification. When the two input models are different model types, this VI determines the model type of the resulting model by the following model hierarchy: state-space>transfer function>zero-pole-gain. For example, if one input is a state-space model and the other is a zero-pole-gain model, the resulting model is a state-space model. To access and modify the data in the model, use the Model Information VIs.
	error out contains error information. This output provides standard error out functionality.

CD Series State-Space and Zero-Pole-Gain

This VI converts zero-pole-gain models into state-space models before connecting the models.

	Model 1 is the first model this VI uses to create the Connected Model.
	Model 2 is the second model this VI uses to create the Connected Model.
	Connections specifies which outputs of the first model this VI connects to which inputs of the second model. Output Model 1 specifies the index of the output of Model 1 to connect to the input of Model 2 corresponding to Input Model 2. Input Model 2 specifies the index of the input of Model 2 to connect to the output of Model 1 corresponding to Output Model 1.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Delay Adjustment Settings approximates the delay that this VI eliminated by connecting the models. With continuous systems, the approximation is based on Pade approximation, while discrete systems increase the system order to account for delay. If you specify FALSE for the Adjust Model for Delay parameter, this VI does not make any approximation for any delay. Adjust Model for Delay specifies if you want to adjust the model for delay. The default is FALSE, which means you do not want to adjust the model for delay. Pade Approximation Order specifies the Pade approximation order. The default is 2.
	Series Model represents the closed-loop system that results from this VI connecting Model 1 and Model 2 according to the Connections specification. When the two input models are different model types, this VI determines the model type of the resulting model by the following model hierarchy: state-space>transfer function>zero-pole-gain. For example, if one input is a state-space model and the other is a zero-pole-gain model, the resulting model is a state-space model. To access and modify the data in the model, use the Model Information VIs.
	error out contains error information. This output provides standard error out functionality.

CD Series Transfer Function and State-Space

This VI converts transfer function models into state-space models before connecting the models.

	Model 1 is the first model this VI uses to create the Connected Model.
	Model 2 is the second model this VI uses to create the Connected Model.
	Connections specifies which outputs of the first model this VI connects to which inputs of the second model. Output Model 1 specifies the index of the output of Model 1 to connect to the input of Model 2 corresponding to Input Model 2. Input Model 2 specifies the index of the input of Model 2 to connect to the output of Model 1 corresponding to Output Model 1.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Delay Adjustment Settings approximates the delay that this VI eliminated by connecting the models. With continuous systems, the approximation is based on Pade approximation, while discrete systems increase the system order to account for delay. If you specify FALSE for the Adjust Model for Delay parameter, this VI does not make any approximation for any delay. Adjust Model for Delay specifies if you want to adjust the model for delay. The default is FALSE, which means you do not want to adjust the model for delay. Pade Approximation Order specifies the Pade approximation order. The default is 2.
	Series Model represents the closed-loop system that results from this VI connecting Model 1 and Model 2 according to the Connections specification. When the two input models are different model types, this VI determines the model type of the resulting model by the following model hierarchy: state-space>transfer function>zero-pole-gain. For example, if one input is a state-space model and the other is a zero-pole-gain model, the resulting model is a state-space model. To access and modify the data in the model, use the Model Information VIs.
	error out contains error information. This output provides standard error out functionality.

CD Series Transfer Function and Transfer Function

	Model 1 is the first model this VI uses to create the Connected Model.
	Model 2 is the second model this VI uses to create the Connected Model.
	Connections specifies which outputs of the first model this VI connects to which inputs of the second model. Output Model 1 specifies the index of the output of Model 1 to connect to the input of Model 2 corresponding to Input Model 2. Input Model 2 specifies the index of the input of Model 2 to connect to the output of Model 1 corresponding to Output Model 1.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Delay Adjustment Settings approximates the delay that this VI eliminated by connecting the models. With continuous systems, the approximation is based on Pade approximation, while discrete systems increase the system order to account for delay. If you specify FALSE for the Adjust Model for Delay parameter, this VI does not make any approximation for any delay. Adjust Model for Delay specifies if you want to adjust the model for delay. The default is FALSE, which means you do not want to adjust the model for delay. Pade Approximation Order specifies the Pade approximation order. The default is 2.
	Series Model represents the closed-loop system that results from this VI connecting Model 1 and Model 2 according to the Connections specification. When the two input models are different model types, this VI determines the model type of the resulting model by the following model hierarchy: state-space>transfer function>zero-pole-gain. For example, if one input is a state-space model and the other is a zero-pole-gain model, the resulting model is a state-space model. To access and modify the data in the model, use the Model Information VIs.
	error out contains error information. This output provides standard error out functionality.

CD Series Transfer Function and Zero-Pole-Gain

This VI converts zero-pole-gain models into transfer function models before connecting the models.

	Model 1 is the first model this VI uses to create the Connected Model.
	Model 2 is the second model this VI uses to create the Connected Model.
	Connections specifies which outputs of the first model this VI connects to which inputs of the second model. Output Model 1 specifies the index of the output of Model 1 to connect to the input of Model 2 corresponding to Input Model 2. Input Model 2 specifies the index of the input of Model 2 to connect to the output of Model 1 corresponding to Output Model 1.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Delay Adjustment Settings approximates the delay that this VI eliminated by connecting the models. With continuous systems, the approximation is based on Pade approximation, while discrete systems increase the system order to account for delay. If you specify FALSE for the Adjust Model for Delay parameter, this VI does not make any approximation for any delay. Adjust Model for Delay specifies if you want to adjust the model for delay. The default is FALSE, which means you do not want to adjust the model for delay. Pade Approximation Order specifies the Pade approximation order. The default is 2.
	Series Model represents the closed-loop system that results from this VI connecting Model 1 and Model 2 according to the Connections specification. When the two input models are different model types, this VI determines the model type of the resulting model by the following model hierarchy: state-space>transfer function>zero-pole-gain. For example, if one input is a state-space model and the other is a zero-pole-gain model, the resulting model is a state-space model. To access and modify the data in the model, use the Model Information VIs.
	error out contains error information. This output provides standard error out functionality.

CD Series Zero-Pole-Gain and State-Space

This VI converts zero-pole-gain models into state-space models before connecting the models.

	Model 1 is the first model this VI uses to create the Connected Model.
	Model 2 is the second model this VI uses to create the Connected Model.
	Connections specifies which outputs of the first model this VI connects to which inputs of the second model. Output Model 1 specifies the index of the output of Model 1 to connect to the input of Model 2 corresponding to Input Model 2. Input Model 2 specifies the index of the input of Model 2 to connect to the output of Model 1 corresponding to Output Model 1.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Delay Adjustment Settings approximates the delay that this VI eliminated by connecting the models. With continuous systems, the approximation is based on Pade approximation, while discrete systems increase the system order to account for delay. If you specify FALSE for the Adjust Model for Delay parameter, this VI does not make any approximation for any delay. Adjust Model for Delay specifies if you want to adjust the model for delay. The default is FALSE, which means you do not want to adjust the model for delay. Pade Approximation Order specifies the Pade approximation order. The default is 2.
	Series Model represents the closed-loop system that results from this VI connecting Model 1 and Model 2 according to the Connections specification. When the two input models are different model types, this VI determines the model type of the resulting model by the following model hierarchy: state-space>transfer function>zero-pole-gain. For example, if one input is a state-space model and the other is a zero-pole-gain model, the resulting model is a state-space model. To access and modify the data in the model, use the Model Information VIs.
	error out contains error information. This output provides standard error out functionality.

CD Series Zero-Pole-Gain and Transfer Function

This VI converts zero-pole-gain models into transfer function models before connecting the models.

	Model 1 is the first model this VI uses to create the Connected Model.
	Model 2 is the second model this VI uses to create the Connected Model.
	Connections specifies which outputs of the first model this VI connects to which inputs of the second model. Output Model 1 specifies the index of the output of Model 1 to connect to the input of Model 2 corresponding to Input Model 2. Input Model 2 specifies the index of the input of Model 2 to connect to the output of Model 1 corresponding to Output Model 1.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Delay Adjustment Settings approximates the delay that this VI eliminated by connecting the models. With continuous systems, the approximation is based on Pade approximation, while discrete systems increase the system order to account for delay. If you specify FALSE for the Adjust Model for Delay parameter, this VI does not make any approximation for any delay. Adjust Model for Delay specifies if you want to adjust the model for delay. The default is FALSE, which means you do not want to adjust the model for delay. Pade Approximation Order specifies the Pade approximation order. The default is 2.
	Series Model represents the closed-loop system that results from this VI connecting Model 1 and Model 2 according to the Connections specification. When the two input models are different model types, this VI determines the model type of the resulting model by the following model hierarchy: state-space>transfer function>zero-pole-gain. For example, if one input is a state-space model and the other is a zero-pole-gain model, the resulting model is a state-space model. To access and modify the data in the model, use the Model Information VIs.
	error out contains error information. This output provides standard error out functionality.

CD Series Zero-Pole-Gain and Zero-Pole-Gain

	Model 1 is the first model this VI uses to create the Connected Model.
	Model 2 is the second model this VI uses to create the Connected Model.
	Connections specifies which outputs of the first model this VI connects to which inputs of the second model. Output Model 1 specifies the index of the output of Model 1 to connect to the input of Model 2 corresponding to Input Model 2. Input Model 2 specifies the index of the input of Model 2 to connect to the output of Model 1 corresponding to Output Model 1.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Delay Adjustment Settings approximates the delay that this VI eliminated by connecting the models. With continuous systems, the approximation is based on Pade approximation, while discrete systems increase the system order to account for delay. If you specify FALSE for the Adjust Model for Delay parameter, this VI does not make any approximation for any delay. Adjust Model for Delay specifies if you want to adjust the model for delay. The default is FALSE, which means you do not want to adjust the model for delay. Pade Approximation Order specifies the Pade approximation order. The default is 2.
	Series Model represents the closed-loop system that results from this VI connecting Model 1 and Model 2 according to the Connections specification. When the two input models are different model types, this VI determines the model type of the resulting model by the following model hierarchy: state-space>transfer function>zero-pole-gain. For example, if one input is a state-space model and the other is a zero-pole-gain model, the resulting model is a state-space model. To access and modify the data in the model, use the Model Information VIs.
	error out contains error information. This output provides standard error out functionality.

CD Series Details

This VI might convert one or both input models to different forms before connecting the models. Refer to the LabVIEW Control Design User Manual for more information about connecting models in series.

This VI supports delays for single-input single-output models. For multiple-input multiple-output models, this VI transfers the delays of the outputs of the first model, which this VI connects to the inputs of the second model, to the inputs of the first model. Likewise, this VI transfers the delays of the inputs of the second model, which this VI connects to the outputs of the first model, to the outputs of the second model.

This VI transfers the delay because the connected input-output pair disappears from the resulting series model. You can lose some transport delay information when this VI eliminates such connected input-output pairs in the resulting series model. You can configure this VI to incorporate delays into the resulting series model by using the CD Convert Delay with Pade Approximation VI (continuous models) or the CD Convert Delay to Poles at Origin VI (discrete models). Refer to the LabVIEW Control Design User Manual for more information about delays and the limitations of Pade Approximation.