Campbell Scientific CR10 CR10 Measurement and Control - Page 211

APPENDIX

C.

BINARY TELECOMMUNICATIONS

C.l

TELECOMMUNICATIONS

COMMAND WITH BINARY

RESPONSES

Command

DescriPtion

[no.

of

loc.]F

BINARY DUMP

- CR10 sends,

in FinalStorage

Format

(binary,

the

number

of

Final

Storage

locations sPecified

(from

current MPTR

locations),

then Signature

(no

PromPt).

DATALOGGER J AND

K

COMMANDS

3142J

The

3142J

command

is used to

toggle

datalogger

user

flags,

request

final

storage

data, and

to

establish

the

input locations

returned by

the

K

command.

The

format

of

the

command

is as follows:

31 42J

<CR>abcd'..

n

N

U

LL

where

'l)

"3142J<CR>"

is

the

command.

2)

"a"

is

a

1

byte

value

representing

the

user

flags

to

be

toggled.

The

most

significant

bit

(MSB), if set, will toggle

datalogger

user

flag

8.

Likewise, the

2nd

most

significant

bit, if set, will

toggle user flag

7,

and

so on to

the

least

significant bit

which,

if set,

toggles

user

flag

1.

Toggle

means

that

if a

flag

is set,

it

will

be

then

reset,

or

if it

is

reset,

it

will

be set.

3)

'b"

is

a

1

byte value

whose

MSB will determine

whether

Final

Storage

Data is returned after

the

K

command.

lf

the

bit is

set,

Final

Storage

Data, if

any,

will be

returned after

the

next

K

command'

The

datalogger

initially has this bit reset upon

entering

telecommunications,

but once set by

a J

command,

it

will

remain

set

until reset by another

J

command

or

telecommunications

is

terminated.

The

2nd

MSB set means

a

port

toggle

byte will

follow

and

port

status

is

to

be returned with

the

K

command.

Like

the

MSB,

this

bit

is

reset

upon entering

telecommunications, but

remains

set once set

until

reset by another J command

or

telecommunications

is

terminated.

Currently

only

the

CR10

datalogger

recognizes

this

bit'

The

remaining bits

are

reserved.

4)

lf

the

2nd

MSB in "b" was set

then

"c" is

a

port

toggle

byte,

otherwise

"c,d,...,n" are

each

1

byte binary values

each

representing

a

datalogger

input

storage

location.

The data

at

those

locations

will be

returned after

the

next K

command. ASCllcode

1

(0000001 binary)

represents input location

1.

ASCII codes

2

(00000010 binary) represents

input

location

2,

and so on.

The

order of

the location

requests

is

not

important.

The

list is limited, however, to 62

total location

requests.

5)

"Null"

or ASCII code

O

(00000000 binary

)

terminates the J

command.

Alternately,

11111111 binary aborts the J

command.

lf

aborted, flags

will

not

be

toggled

and location

requests

will

not be saved.

User

Enters

Datalogger

Echo

2

3

1

4

2

J

CR

a

b

c

d

n

Null

1

4

2

J

CR

LF

a

b

c

d

n

Null

The

K

command

returns datalogger time,

user

flag status,

port

status if

requested,

the

data

at

the

input locations requested

in

the

J

command, and FinalStorage

Data if

requested by

the

J

command.

The

format

of

the command

is K<CR> (K

Return). The

datalogger will echo

the

K

and

Return and

send

a Line

Feed.

The

amount of data

that

follows depends

on

the J command

previously

executed;

four

time

bytes,

a

user

flags

byte,

four

bytes

for each

input location

requested

in

the J

command,

Final Storage

data

in

CSI's

binary

format

if requested by

the J command, and

terminating

in 7F 00

HEX and two signature

bYtes.

c-1

Campbell Scientific CR10 CR10 Measurement and Control - Page 211

Command, loc.]F

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