Bit decomposition
- Block name
- ST call
- Library
- Version
- Description
- Inputs
- Outputs
- Function
- Application example

Bit decomposition

Block name

BD19_BIT_DECOMPOSITION

ST call

PROGRAM BD19_TEST
 
VAR 
 
    I1: LINT;
 
    O1: ARRAY [0 .. 63] OF BOOL;
 
    FB: LIB.CORE.V1_0.BD19_BIT_DECOMPOSITION;
END_VAR
 
 
 
    FB(IN := I1, OUT=>O1);
 
END_PROGRAM

Library

LIB\CORE

Version

V1.0

Description

The function decomposes an integer value to bits (which are formed in an array).

Inputs

Input	Type	Description
ENABLED	BOOL	Enable of function.
IN	LINT	Input value

Outputs

Output	Type	Description
OUT	ARRAY [0 .. 63] OF BOOL	Output array of values
BS	BOOL	Sign of the out output, if OUT<0 then BS=FALSE

Function

The block decomposes the input integer value IN to individual bits OUT[0..63]. If IN<0 then BS=FALSE, else BS=TRUE.

Note: The output array elements are numbered from 0, while the optional binary outputs out1, out2, out3 etc. start with index 1. Thus, e.g. out3 binary output is the value of the out[2] array element.

Application example

The block is used to extract bits from an integer value, i.e. status and alarm bits communicated from a 3rd party device.

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