Schneider Electric Modbus Plus Network Bridge Multiplexer none - Manual (Page 51)

Configuring the Modbus Models 31007492 41
Set the CONFIGURE Mode
Set switch 1 to the CONFIGURE position (UP).
Define the Configuration Port
Switches 2 and 3 determine the port connector to be used for connecting
the serial terminal. Set them for the port you want to use.
Set the Configuration Port Parameters (NW–BM85–000)
Set switches 4 ... 8 to match the terminal's baud rate, parity mode, and
stop bits. The port always uses 8 data bits for configuration.
Set the Configuration Port Parameters (NW–BM85C002, D008)
Set switches 4 ... 7 to match the terminal's baud rate and parity mode.
The port always uses 8 data bits and 1 stop bit for configuration. Always
leave switch 8 in its RUN (UP) position. The BM85 will not run unless
switch 8 is UP.
3.5.3 Connecting the Terminal
What You Will Need
You will need a serial terminal and cable of the types listed in
Compatible Devices and Cables, in Appendix A.
Connect the Terminal
The BM85 power should be off at this time. Connect the terminal to the
port you are using for configuration. Set the terminal's communication
parameters to match those of the BM85. Power up your terminal, and
start any emulation program you are using. Your terminal should be
running and ready, before you apply power to the BM85.
Apply Power to the BM85
When you have set the configuration switches, and your terminal is
ready, apply power to the BM85.
The configuration port's indicator should blink at one second intervals,
showing that the configuration mode is active. Your terminal should
display the MODBUS PORTS CONFIGURATION (V1) screen.
Your configuration screens and keyboard commands are described
starting at Section 3.6.