# Documentation

## Int Decomposition (BD54)

### Block name

BD54_INT_DECOMPOSITION

### ST call

`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`

LIB\CORE

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.