Campbell CR23X Specifikace stáhnout pdf (Strana 270)

APPENDIX C. BINARY TELECOMMUNICATIONS

C-2

another J command or telecommunications

is terminated.

The 4th MSB indicates if the input locations

requested by the J command are 2 byte (B4

set) or 1 byte. In the case of 2 byte

locations (most significant byte first), the

terminating location is a 2 byte NULL. FF in

the most significant byte will still abort the

command.

If “b” = FF or 11111111, then the J

command aborts.

The remaining bits are reserved.

4) If 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. ASCII

code 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 0 (00000000 binary)

terminates the J command. Alternately,

11111111 binary aborts the J command. If

aborted, flags will not be toggled and

location requests will not be saved.

For example:

User Datalogger

Enters Echo

22

44

11

33

JJ

CR CR

LF

<

aa

bb

cc

dd

nn

Null Null

K 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 Final Storage 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.

User Datalogger

Enters Echo

KK

CR CR

LF

Time Minutes byte 1

Time Minutes byte 2

Time Tenths byte 1

Time Tenths byte 2

Flags 1..8 byte

Ports byte (if requested)

Flags 11..18 byte (if requested)

Data1 byte 1

Data1 byte 2

Data1 byte 3

Data1 byte 4

Data2 byte 1

Data2 byte 2

Data2 byte 3

Data2 byte 4

DataN byte 1

DataN byte 2

DataN byte 3

DataN byte 4

Final Storage Data bytes

01111111 binary byte

00000000 binary byte

Signature byte 1

Signature byte 2

Time Minutes byte 1 is most significant.

Convert from binary to decimal. Divide by 60 to

get hours, the remainder is minutes. For

example, 00000001 01011001 (01 59 HEX) is

345 decimal minutes or 5:45.

Time Tenths byte 1 is most significant. Convert

from binary to decimal. Divide by 10 to get

seconds and tenths of seconds. For example,

00000001 11000110 (01 C6 HEX) is 454

decimal or 45.4 seconds. Thus the datalogger

time for 01 59 01 C6 HEX is 5:45:45.4.

1 2 ... 265 266 267 268 269 270 271 272 273 274 275 ... 373 374

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