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Bit Output

Mechaware API Documentation >Output

Overview

Overview

The Bit Output block is used for discrete bit outputs to internal firmware variables. Any internal variable on the controller can be used for a MechaWare bit output using the Bit Output block.

The Memory Address defines the output internal variable location. The data type of the internal variable can be float (32 bits) , double (64 bits), short integer (16 bits), integer (32 bits) and long integer (64 bits).

The Bit Number defines which bit should be used for the output. Bit 0 is always the LSB for the output. The MSB depends on the word type: 15 for short integer, 31 for float and integer, and 63 for double and long integer.

Note: The input designates all non-zero values as true (1).

The output bit is written at the update rate, specified by the Evaluate Block.

Example

The following example shows how to use the Counter Block and take the output to turn on Digital IO based on the Counter output.

In this example, the Bit Output is used to write to Node 1, Bit 2 and 3 Outputs. When the Output of the Counter is higher than 3, Bit 3 goes high. When the Counter is higher than 4, Bit 4 goes high using the second Bit Output block.

The configuration values for this block are as follows:

Memory Address

Bit Output Address. Defines location of the internal input variable. Format is Hexadecimal.

Bit Number

Bit to be used as output. 0 is always the LSB. The MSB depends on the input type (15, 31, or 63. see Data Type).

Data Type

Defines the data type of the internal variable memory being written to:

Float (32 bits)
Double (64 bits)
Short integer (16 bits)
Integer (32 bits)
Long integer (64 bits)

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) or background. 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 Memory Address of the Bit Output specifies which memory location is written to. The address is in hexadecimal format. Addresses for output variables can be obtained using VM3.

The Bit Number defines which bit should beto used formodify in the output. Bit 0 is always the LSB for the output. The MSB depends on the word type: 15 for short integer, 31 for float and integer, and 63 for double and long integer.

The block has two user data fields (User Data 0, User Data 1) to store application-specific data for convenient storage and retrieval. For more information, see User Data Storage.

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

BIT_OUTPUTBlock

Declaration

Public Method

  
class BIT_OUTPUTBlock: public virtual Block
{
public:

	// User accessible coefficients
	long				BitNumber;
};
 

Required Header: mechaware.h

Description

The BIT_OUTPUT block is used for outputs other than those provided by the standard output blocks. Any internal variable on the controller can be written to by a MechaWare output using the Bit Output block. See the Overview for details.

Parameters

long
BitNumber
 Bit Number of the output.

Methods

Block Methods

See Also

IO Output

 
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