Telecommunications Command With Binary Responses - Campbell CR510 Operator's Manual

APPENDIX B. ADDITIONAL TELECOMMUNICATIONS INFORMATION
B.1 TELECOMMUNICATIONS
COMMAND WITH BINARY
RESPONSES
Command
[no. of loc.]F
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:
3142J<CR>abcd...nNULL
where
1) "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. If 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 CR510 datalogger recognizes this bit.
The remaining bits are reserved.
Description
BINARY DUMP - CR510
sends, in Final Storage Format
(binary, the number of Final
Storage locations specified
(from current MPTR locations),
then Signature (no prompt).
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.
User Datalogger
Enters Echo
3 3
1 1
4 4
2 2
J J
CR CR
LF
<
a a
b b
c c
d d
n n
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.
B-1