Constant

Overview

Overview

The Constant block outputs a constant value.

The Constant block is often used to tie a reset value to zero, set a constant feed-forward gain, and general computations.

Example

The following example illustrates how to make a summation routine, when the model starts with a constant (1) and sums the output to the constant after each sample.

The configuration values for this block are as follows:

Constant Constant. Output = Constant Evaluate Block This block allows you to specify whether the block executes Every Sample, Every Other Sample (Odd or Even), or Every Fourth Sample (and specify the First, Second, Third, or Fourth). This provides greater flexibility in controlling the execution of a model and to preserve performance for other areas of motion control. User Defined Block Priority When selected, allows you to enter a Priority Code to modify Execution Ordering of this block. For more information, see Block Execution Order and User Defined Block Priority. Priority For an explanation of how the Priority field is used by the MechaWare Model Downloader, see Block Execution Order and User Defined Block Priority. User Data 0 Application-specific data. See User Data Storage. User Data 1 Application-specific data. See User Data Storage.

 

Matlab/Simulink

Simulink Interface The Output of a Constant block is the Constant value defined in the block. The block has two user data fields (User Data 0, User Data 1) to store application-specific data for convenient storage and retrieval. See User Data Storage for details. The block's update schedule is determined by the Evaluate Block. The following Parameter Dialog Box can be opened by double-clicking on the block in a Simulink Model:

 

C++ API

CONSTANTBlock

Declaration

Public Method

	class CONSTANTBlock: public virtual Block { public: // User accessible coefficients double Constant; };
	Required Header: mechaware.h

Description

The Constant block outputs a constant value.

Parameters

Double Constant Constant Constant. Output = Constant

Methods

Block Methods

 

See Also

Matrix Gain