User's Manual
905U-D Radio Modem Module User Manual
Page 44 © May 2000
Appendix A Switch Configuration
1.0 Introduction
In order to configure the 405U unit, or to change the configuration, the unit must be placed
into Configuration Mode. When in this mode, the unit will not operate as transparent or
controlled mode.
Module configuration may be performed using the on-board miniature (DIP) switches or from
the host device using Hayes AT command codes (refer to Section 4.3).
In order to avoid radio interference between adjacent 405U networks, a "system address" is
required to be configured. Each module within the one network must have the same system
address. The system address may be any number between 1 and 32 767.
To simplify matters, the system address may be just an arbitrary pattern of off and on
switches (“0”s and “1”s) - it is not important what the actual system address value is - as
long as each module in the network has the same switch pattern for the system address. A
system address of zero (all 0's) is not acceptable.
NOTE:
The configuration used in your system should be recorded for future reference. This information
will be required when the unit is initially configured, if a unit is replaced, if the system is to be
expanded, or if units are tested with the internal Self Test configuration. Configuration record
sheets are provided at the end of this manual. These sheets should be used to assist in planning
the network for your application and to have the data readily available for entry.
Entering a system address puts the 405U in Configuration Mode:
• Carefully remove the blue plastic cover in the centre of the module to reveal the switches
and red pushbutton underneath.
•
Set the chosen system address on the
DIP switches as shown. Make sure the
switch marked ‘0’ is set to ‘0’. Other
switches can be in any chosen position.
•
Press the red button for approx. 3
seconds - until the Serial RX LED
indicates RED.
•
The Serial RX LED will indicate GREEN
on release of the button indicating the unit
is in “Configuration Mode”
-------SYSTEM--------
---------ADDRESS--------
0