805U Radio Modem Module
User Manual
Page
30
©
November 2004
In transparent mode, a group address also needs to be configured. The group address is also a
8 bit value (values 0 to 255). This is not required in controlled mode.
In controlled mode, each module is also configured with a unit address between 0 and 127 -
there can be up to 128 modules in the one controlled mode system.
In transparent mode, the unit address is used as the second group address for transparent
repeaters. For modules not configured as a repeater, the unit address is ignored. For
repeaters, if a message is received with the correct system address, and the first group
address, the data is output to the serial port, and the message is re-transmitted but with the
second group address inserted.
If a repeater receives a message with the correct group address, but with the second system
address (corresponding to the configured unit address), then the data is not output to the
serial port, but the message is re-transmitted, but with the first or normal group address
inserted.
4.3
Default Configuration
The default configuration of the 805U is transparent mode, no error check, no CTS/RTS flow
control, serial rate 9600, radio rate 19200, character type 8/n/1. The system address will be
set in the factory according to the module serial number.
The module may be forced to factory default setting by using any of the three configuration
methods.
4.4
Configuration Program
The configuration program is Cfg_805UD. This program will run under Windows 95, 98,
NT, or 2000. The program may be obtained from the Product CD which came with your
purchase, or can be
downloaded from our web
page (www.elprotech.com).
When you use this program,
you create a configuration in
the PC and then load or
program the configuration
into the 805U module. You
can also read the
configuration from a module
to edit.
The opening screen will show
default settings with a random
number for the system
address.
