Installation Guide

Changing Conext ComBox Settings
975-0679-01-01 Revision F 3–23
Xanbus Communications
The Xanbus Bit Rate parameter for the Conext ComBox has two possible
values: 125 and 250 Kbps. The default value for the Xanbus Bit Rate is
250 Kbps. XW system devices and components require a 250 Kbps bit rate. You
cannot change the bit rate for XW system devices and components.
When this setting is changed, reboot the Conext ComBox for the new setting to
take effect. See “Rebooting the Conext ComBox” on page 3–13.
Grid-Tie Inverters By default, the Xanbus bit rate is set to 250 Kbps for North American Grid-Tie
inverter models and 125 Kbps for European models. If you have a Grid-Tie
inverter and want to change the bit rate, make sure you follow the recommended
procedure supplied by Schneider Electric: Application Note, “Xantrex Grid-Tie
Solar Inverter Baud Rate Change Procedure” (976-0216-01-01). To obtain the
Application Note, go to http://solar.schneider-electric.com/tech-support to
request a copy.
Note: Devices operating on the same bus must have the same bit rate. You
cannot operate devices with different bit rates on the same bus.
Note: Remote firmware upgrade using the Conext ComBox is not supported on
systems with a 125 Kbps bit rate. If you change the bit rate to 125 Kbps, then you
will no longer be able to use the Conext ComBox to upgrade the firmware on
Grid-Tie inverters. You will have to upgrade each inverter in the system using an
RS-232 cable and a laptop.