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9 STEP 5 Operation Set with Programming Examples 11.92

9.3.9 Conversion operations

Operation Meaning

CFW One's complement of ACCU 1-L

CSW Two's complement of ACCU 1-L

CSD Two's complement of ACCU 1

DEF Conversion of BCD word-coded number to fixed-point number

DUF Conversion of fixed-point number to BCD word-coded number

DED Conversion of BCD double-word-coded number to fixed-point

double-word

DUD Conversion of fixed-point double-word to BCD double-word-

coded number

FDG Conversion of fixed-point double-word to floating-point number

GFD Conversion of floating-point number to fixed-point double-word

Examples:

The contents of data word 64 are to be inverted bit for bit and stored in data word 78.

STEP 5 program: Assignments of data words:

: L DW64 KM = 0011111001011011

: CFW

: T DW78 KM = 1100000110100100

The contents of data word 207 are to be interpreted as a fixed-point number and stored in data

word 51 with the opposite sign.

STEP 5 program: Assignments of data words:

: L DW207 KF: +51

: CSW

: T DW51 KF: – 51

9.3.10 Decrementing and incrementing

Operation Description

D 0 to 255 Decrementing

I 0 to 255 Incrementing

Accumulator contents 1 are decremented/incremented by

the number specified in the parameter. Execution of the

operation is independent of conditions. It is restricted to the

right byte (without carry).

Example:

STEP 5 program: Assignments of data words:

: L DW7 KH = 1010

: I 16

: T DW8 KH = 1020

: D 33

: T DW9 KH = 10FF

9–36

SINUMERIK 840C/880 (PJ)

1 2 ... 91 92 93 94 95 96 97 98 99 100 101 ... 128 129

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Siemens 880 Manuale delle Istruzioni Pagina 96

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