Documentation

PROGRAM BD54
 VAR
 ARRAY1: ARRAY [0..3] OF DINT;
 ARRAY2: ARRAY [0..3] OF REAL;
 DINT1: DINT := 23139;
 FB: LIB.CORE.V1_0.BD54_INT_DECOMPOSITION := (LOW := [1, 5, 1, 13] ,HIGH := [4, 8, 8, 16]);
 END_VAR
  FB(IN:= DINT1, OUT=>ARRAY1, DY=>ARRAY2);
END_PROGRAM

Library

LIB\CORE

Version

V1.0

Description

The block decomposes the input data to up to four (integer) values composed from defined range of bits.

Inputs

Input	Type	Description	Default value
IN	DINT	Input data - double integer value	0
LOW	ARRAY[0..3] OF LIB.CORE.V1_0.BIT32	first bits of the range, array [0..3] with values 1 to 32	[1]
HIGH	ARRAY[0..3] OF LIB.CORE.V1_0.BIT32	last bits of the range, array [0..3] with values 1 to 32	[1]

Outputs

Output	Type	Description
OUT	ARRAY_DINT	Output value, array [0..3]
DY	ARRAY_REAL	Output value, array [0..3]
bs	bool	Sign of the input value

Function

The block decomposes the input data according to the low and high parameters. For example, to evaluate the first 4 bits as a value ranged from 0 to 15, fill in low as [1,0,0,0] and high as [4,0,0,0]: the low bit is 1, the high bit is 4. The resulting value will be in the first element of the output array. bs is the sign of the input data. The displayed range may be 2 to 32 bits.

Application example

Input vector decomposition with parameters low = [1,5,1,13] and high = [4,8,8,16]. The first value is composed from bits 1 to 4, the second value is composed from bits 5 to 8, third value from bits 1 to 8, and fourth value from bits 13 to 16 of the input value dint1.

Documentation

Int Decomposition (BD54)

Integer decomposition

Block name

ST call