Campbell 21X Manual do Operador descarregar pdf (Página 171)

i

c.2 F|NAL STORAGE FORMAT

I

21X data

is fprmatted

as

either 2 byte LO

Resolution oi 4 byte Hl Resolution

values. The

first

two byteb

of an output array contain a

code

noting

the

stfrt of the output

array

and the

output array lD,

followed by

the 2

or

4

byte

data

values. At the end of the

data sent in response

to the telecommunications

F

command a

2 byte

signature

is

gent

(see

below).

Representing the bits in the

first byte

of each

two byte

pair

as ABCD EFGH

(A

is

the

most

significant

bit,

MSB),

the byte

pairs

are

described

bdlow.

LO RESOLUTION

FORMAT.

D,E,F,

NOT

ALL

BITS DESCRIPTION

A

FolaritY,0=*,

1=-.

B,

C

pecimallocators

as defined below.

D-H

plus

t3

bit binary value

(D=MSB).

APPENDIX C. BINARY TELECOMMUNICATIONS

second Largest

possible

number

without D,

E, and

F

all

1 is 7167,

byte but

CAMPBELL

SCIENTIFIC

delines

the largest allowable range

as 6999.

The

decimal

locators can be viewed as a

negative base 10

exponent with decimal

locations as

follows:

C Decimal

Location

O XXXX.

1 XXX.X

O XX.XX

1 X.XXX

DATA

TYPE WHEN D,E,F, ALL

EQUAL

ONE

lf

D,

E, and F are

all

ones, the data

type is

determined by the

other

bits as shown

below,. X

implies a

"don't

care"

condition; i.e., the bit can

be either

1

or 0 and

is not

used

in the decode

decision.

B

0

0

1

1

ABCDEFGH

1111110X

XXO

111XX

0 01111XX

01111111

DATA

TYPE AND SECOND BYTE

FORMAT

A,B,C,

=

1

-

Start

of

output array,

G=0. H is the most significant

bit

of the output array

lD.

All 8 bits

of

the

2nd

byte

are also

included

in

the lD.

C

=

0

-

First

byte

of a 4

byte

value.

A,B

=

0; C

=

1

-

Third

byte of a 4 byte

value

A

=

0;

remaining bits

=

1

-

First

byte

of a2byle "dummy"

word.

The

CR10

always

transmits a 0 for the 2nd byte,

but the word

can

be decoded

on

the basis of the

1st byte only.

c-3

1 2 ... 166 167 168 169 170 171 172 173 174 175 176 ... 190 191

Comentários a estes Manuais

Sem comentários