Operator`s manual

SECTION 1. FUNCTIONAL MODES
1-9
4. A semicolon (;) tells the 21X 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 21X 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) Exit and compile
program
As a download file is received, the 21X buffers
the data in memory; the data is not loaded into
the editor or compiled until the 21X receives a
command to do so. The minimum file that could
be sent is the program listing, then ^E^E. ^C^C
tells the 21X to send the signature (Section C.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 21X 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.
1.8.2 PROGRAM TRANSFER WITH STORAGE
MODULE
The SM192/716 Storage Module must be
connected to the 21X. Key *D, then enter
command 71. The command to save, load, or
clear a program and the program number (Table
1.8-2) is entered. After the operation is finished
"13:0000" is displayed.
The datalogger can be programmed on power-
up using a Storage Module. Storage Modules
can store up to eight separate programs. If a
program is stored as program number 8, and if
the Storage Module is connected to the
datalogger serial port at power-up, program
number 8 is downloaded to the datalogger and
compiled.