Elpro Technologies 905U-D User Manual download pdf (Page 33)

Chapter Four Configuration

Page 33 © January 2011

4.2 Addressing

A 905U-D network comprises modules with the same "system" address. The system address is

a 8 bit value (values 0 to 255). Only modules with the same system address will communicate

with each other. If you are adding another module to an existing system, use the same value as

the existing modules. If you are starting a new system, select random values and use the same

value for each module.

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. If fast controlled mode is

used, the unit address must be between 0 and 15 (there can only be two modules in any one fast

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 905U-D 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_905UD. 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. When you use this program, you create a configuration

in the PC and then load or program the configuration into the 905U-D 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.

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Elpro Technologies 905U-D User Manual Page 33