Campbell csi mAXON, Инструкция по эксплуатации

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Section 3. Radiotelemetry Network Components
3-5
3.1.7 RF310M Modem and the RF Link
The RF link is the communication path which is opened between the Start Of
Link modem and the End Of Link modem, along with any Middle Of Link
modems. Any RF link must first be established, then maintained, and finally
shut down.
When collecting data, PC208W establishes, maintains, and shuts down the RF
link as discussed below.
3.1.7.1 Establishing the RF Link
The SOL RF310M is first brought into the Local Command Mode of operation.
In the RF310M-ME State, this is done when the ME line is high on the Serial
I/O port and the SOL modem is in the Wait Mode of operation. After the ME
line is brought high, the baud rate of the SOL modem is set by repetitively
pressing [ENTER]. The SOL modem can operate at 300, 1200, or 9600 baud.
When the baud rate is set, the SOL modem will respond by sending a carriage
return line feed (CR-LF) and an exclamation point (!). In the RF310M-SDC
State, the Local Command Mode is entered after addressing. Some explanation
is contained in Appendix E "RF310M States."
In the Local Command Mode, the SOL modem responds to command
characters received from the terminal or computer. The command characters
are summarized in Table 3-2. All command characters must be capital letters.
TABLE 3-2. RF310M Command
Character Summary
Command Description
E Exit Link Command. The "E" command causes the
datalogger to drop its ME line and shut down the RF link.
F Fast Command. The "F" Command is placed at the end of
the string of setup numbers. In the RF310M-ME State, the
Serial I/O port of the EOL modem will communicate with
the datalogger at 9600 baud with the "F" Command. In the
RF310M-SDC State, the baud rate from the computer to the
SOL modem will be 9600.
R Read Command. The "R" Command reads back the
Shutdown Block.
S Link Setup Command. The Link Setup Command is
followed by a string of setup numbers representing the ID
numbers of the modems in the RF link.
T Terminate Command. The "T" Command will reset the SOL
modem to the Wait Mode of operation.
W Wait Command. The "W" Command will force the RF
modem to wait until there is no carrier detect before
transmitting.