Campbell Manufacturing CR10 用户手册

contains a program editor (EDLOG), a terminal
emulator (GraphTerm), telecommunications
(TELCOM), a data reduction program (SPLIT),
and programs to retrieve data from both
generations of Campbell Scientific's Storage
Modules (SMREAD and SMCOM).

To participate in the programming examples
(Section OV5) you must communicate with the
CR10.  Read Section OV3.1 if the CR10KD is
being used, Section OV3.2 if the PC208
software is being used, or Section 3.3 and
Section 5 if some other computer or terminal is
being used.

The SC12 cable (supplied with the CR10KD) is
used to connect the Keyboard/Display to the 9
pin Serial I/O port on the CR10.

If the Keyboard/Display is connected to the
CR10 prior to being powered up, the "HELLO"
message is displayed while the CR10 checks
memory.  The size of the usable system
memory is then displayed (96 for 96K bytes of
memory).  When the CR10KD is plugged in
after the CR10 has powered up, the display is
meaningless until "*" is pressed to enter a
mode.

For IBM compatible computers, the PC208
software contains a terminal emulator program
called GraphTerm.  When using GraphTerm,
the baud rate, port, and modem types are
specified and stored in a file for future use.

The simplest and most common interface is the
SC32A Optically Isolated RS232 Interface.  The
SC32A converts and optically isolates the
voltages passing between the CR10 and the
external terminal device.

The SC12 Two Peripheral cable which comes
with the SC32A is used to connect the serial I/O
port of the CR10 to the 9 pin port of the SC32A
labeled "Datalogger".  Connect the
"Terminal/Printer" port of the SC32A to the
serial port of the computer with a straight 25 pin
cable or, if the computer has a 9 pin serial port,
a standard 9 to 25 pin adapter cable.

To establish the communication link between
the computer and the CR10, the user may
either select the T option and send carriage
returns as described above or select the "C"
option to "Call" the station (see PC208
Operator's Manual).  Once the link is active,
issue the "7H" command to enter the Remote
Keyboard State.

Devices which can be used to communicate
with the CR10 include standard ASCII terminals
and computers programmed to function as a
terminal emulator.

The basic requirements are:

1.

There must be an asynchronous serial port
to transmit and receive characters.

2.

Communication protocol must be matched
for the two devices.  

3.

The proper cable/interface must be used
between the serial ports.

4.

A computer must be programmed to
function as a terminal.

While the connection between the
computer/terminal and the CR10 may be via
modem (phone, RF, or short haul), the most
frequently used device for a short connection is
the SC32A Optically Isolated RS232 Interface.

Most computer/terminal devices require RS232
input logic levels of -5V for logic low and +5V
for logic high.  Logic levels from the CR10's
serial I/O port are 0V for logic low and +5V for
logic high.

The SC32A converts and optically isolates the
voltages passing between the CR10 and the
external terminal device.  The SC32A is
configured as Data Communications Equipment
(DCE) for direct connection to Data Terminal
Equipment (DTE) which includes most
computers and terminals.

The SC12 Two Peripheral cable which comes
with the SC32A is used to connect the serial I/O
port of the CR10 to the 9 pin port of the SC32A
labeled "Datalogger".  Connect the
"Terminal/Printer" port of the SC32A to the
serial port of the terminal with a user supplied