Rockwell-automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command Manual do Utilizador descarregar pdf (Página 200)

11–4 Data Encoding

Publication

17706.5.16 - October 1996

Hexadecimal

The hexadecimal (hex) numbering system is the most compact way

to represent binary data and allows for the easiest conversion to and

from binary. Hex uses 16 digits, numbers 0 to 9 and letters A to F.

(Letters A to F are equivalent to the decimal numbers 10 to 15,

respectively.)

Each group of four data bits represents one hex digit between 0 and

F. Thus, each 16-bit data word can have a hex value between 0 and

FFFF. Each digit of a hex number has a place value that is a

multiple of 16.

To convert a hexadecimal number to its decimal equivalent, multiply

each hexadecimal digit by its corresponding place value and add the

results of the multiplications.

Hexadecimal Representation of Decimal 423

01 A 7

00 10000 00 1 1 0 1011

0 x 2

= 0

0 x 2

= 0

0 x 2

= 0

0 x 2

= 0

0 x 2

= 0

0 x 2

= 0

0 x 2

= 0

1 x 2

= 1

1 x 2

= 8

0 x 2

= 0

1 x 2

= 2

0 x 2

= 0

0 x 2 = 0

1 x 2

= 4

1 x 2

= 2

0 x 2

= 1

0 x 16

= 0

1 x 16

= 256

10 x 16

= 160

7 x 16

= 01A7

423

1 2 ... 195 196 197 198 199 200 201 202 203 204 205 ... 250 251

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