Kantronics MT1200, Руководство пользователя, Страница: 78 / 157

Other Modes of Operation
Other ways of using your TNC are covered in this section.
Some of the following modes of operation require special software, so they may not be
available if you are using standard terminal programs such as HyperTerminal or
Procomm Plus.
Remote Sensing and Control
You can use two (or more) packet radio stations, each containing a Kantronics TNC, to
implement remote sensing and/or remote control, as follows:
•
remote control of another TNC: from a local Kantronics TNC-based radio
station, use the MYREMOTE command to establish control of a remote
Kantronics TNC-based radio station and issue commands for the remote TNC
to carry out. For details, see the Command Reference.
•
sense analog and/or digital inputs: use the ANALOG command to gather
and report the status of one or two analog input lines in the remote TNC.
Kantronics single port and multi-port TNCs contain an 8 bit A/D converter and
additional circuitry that converts the analog voltage presented at two specified
inputs into digital values from 0 to 255. You can then use these digital values
(reported in binary) as an approximation of the analog voltage values at the
time the TNC interrogated the analog inputs. For details on the ANALOG
command, see the Command Reference.
Note: As documented in the ANALOG and IO commands and the
telemetry port pin specifications, single port devices and multiport devices
use different input lines for analog or digital sensing.
•
control outputs: use the CTRL command to control selected output lines in
the remote TNC (up to two output lines in the MT1200). Each of these output
lines can be set to OPEN (i.e., OFF) or GROUNDED (i.e., ON) by the CTRL
command. Also, the CTRL command can be used with any or all of these
output lines to send a specified number of short ON/OFF pulses (each pulse
lasting about 100 ms, with a fixed length pause between pulses) or a single
long (about 1.5 s) ON/OFF pulse. For details on the CTRL command, see the
Command Reference.
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