4.2 Remote Configuration
Remote configuration of a RPM1 module is possible using the
R
EMOTE
command from within the
configurator. The remote RPM1 unit should be on or in auto-standby mode.
Initially the
R
EMOTE
command is used to enable and disable the ability to remotely configure a module,
as described in section 3.2: User Configurable Command.
Once remote configuration is enabled the
R
EMOTE
command is then used to issue configuration
commands to a remote RPM1. The format for the remote command then becomes:
REMOTE
<
SERIAL NUM
> <
COMMAND
> <
PARAMTER
>
The <
SERIAL NUMBER
>
of the remote RPM1 must be known in order for the remote configuration
request to be executed on the appropriate RPM1 module.
The <
COMMAND
>
to be executed can be any of the following:
Baud 600,1200,2400,4800,9600,19200,38400,57600,115200
Unit 0 to 15
Site 0 to 7
Shdn on/off
Flow hw/none
Serdly 2 to 255
Retry 1 to 63
Strtmsg on/off
The <
PARAMETER
>
is optional, and if not specified the setting for that command is returned and
displayed.
4.3 P
OINT
-
TO
-M
ULTIPOINT
The
RPM1
can be used for point-to-multipoint communications. One module must be considered to be the
master, which is used to address up to 15 remote units in any one site.
During normal operation, the base unit can be set to address another unit dynamically by entering the
configurator and using the A
DDR
command to change the unit address. Upon execution of this command,
provided the parameters are correct, the configurator is exited immediately. A period (‘.’) is sent to the
connected host device to indicate that the change has been registered and the RPM1 is now ready for
communications to the new unit address.
A
DDR
is very similar to the Unit command, except that A
DDR
does not update the stored EEPROM unit
value. As the EEPROM has a limited number of write cycles, using A
DDR
for addressing multiple units in
a point to multipoint network is recommended. Also, the A
DDR
command will exit the configurator
immediately, which is required to resume communications very quickly.
4.4 B
ROADCAST
M
ULTIDROP
The RPM1 has a broadcast mutidrop mode which provides a mechanism for building a large networks.
This mode of operation is determined by the configuration command keyword
ACKMODE
being set to
OFF.
In broadcast mutidrop mode, the RPM1 does not implement network layer functionality related to data
packet routing, acknowledgement and retries. The connected host device should provide network layer
functionality.
The site code and unit address is still used by the radio modem when working in broadcast multidrop
mode. For a given multipoint network all radio modems within a group must contain the same site code
and unit address.
Radiometrix Ltd.
VHF Narrow Band FM Radio Packet Modem
page 12
RADIOMETRIX [ RADIOMETRIX LTD ]
