Campbell Scientific CR510 Basic Datalogger - Manual (Page 182)

APPENDIX B. BINARY TELECOMMUNICATIONS
B-6
SENDING ASCII PROGRAM INFORMATION
Program listings are sent in ASCII. At the end
of the listing, the CR510 sends control E (5 hex
or decimal) twice.
Table 1.8-4 is an example of the program listing
sent in response to command. Your numbers
may be different. Note that the listing uses
numbers for each mode: The numbers for
∗
A,
∗
B, and
∗
C modes are 10, 11, and 12,
respectively.
TABLE B.4-2. Example Program Listing
From
∗∗∗∗
D Command 1
MODE 1
SCAN RATE 5
1:P17
1:1
2:P86
1:10
3:P70
1:1
2:1
4:P0
MODE 2
SCAN RATE 0
MODE 3
1:P0
MODE 10
1:28
2:64
3:0
4:5332
5:1971
MODE 12
1:0
2:0
MODE 11
1:6597
6:
2:30351 7:
3:48 8:
4:0 9:
5:0 10:
^E ^E 11:
LOAD PROGRAM FROM ASCII FILE
Command 2 sets up the CR510 to load a
program which is input as serial ASCII data in the
same form as sent in response to command 1.
A download file need not follow exactly the
same format that is used when listing a program
(i.e., some of the characters sent in the listing
are not really used when a program is loaded).
Some rules which must be followed are:
1. "M" must be the first character other than a
carriage return, line feed, semicolon, or 7D
Hex. The "M" serves the same function as
"
∗
" does from the keyboard. The order in
which the Modes are sent in does not
matter (i.e., the information for Mode 3
could be sent before that for Mode 1).
2. "S" is necessary prior to the Scan Rate
(execution interval).
3. The colons (:) are used to mark the start of
actual data.
4. A semicolon (;) tells the CR510 to ignore
the rest of the line and can be used after an
entry so that a comment can be added.
There are 4 two-character control codes which
may be used to verify that the CR510 receives a
file correctly:
^B ^B (2hex, 2hex)--Discard current buffer
and reset signature
^C ^C (3hex, 3hex)--Send signature for
current buffer
^D ^D (4hex, 4hex)--Load current buffer and
reset signature
^E ^E (5hex, 5hex)--Load current buffer, Exit
and compile program
As a download file is received, the CR510
buffers the data in memory; the data is not
loaded into the editor or compiled until the
CR510 receives a command to do so. The
maximum size of the buffer is 1.5K. The
minimum file that could be sent is the program
listing, then ^E ^E. ^C ^C tells the CR510 to
send the signature (Appendix B.3) for the
current buffer of data. If this signature does not
match that calculated by the sending device, ^B
^B can be sent to discard the current buffer and
reset the signature. If the signature is correct,
^D ^D can be sent to tell the CR510 to load the
buffer into the editor and reset the signature.
Once the complete file has been sent and
verified, send ^E ^E to compile the program and
exit the load command.