Installation Guide

Configuration
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Modbus Master Configuration
The Conext ComBox can serve as a Modbus Master in order to integrate with
standard third-party power meters through RS485 Modbus. Modbus Master
functionality provides integration with power meters and grid-tie inverters. When
enabled, readings for these devices are displayed on the Home screen along
with other measurements. Readings are display-only, meaning they cannot be
clicked for further information or settings because they remain static.
Devices can be configured from the following setting screens when the Conext
ComBox is set up in a master-slave configuration. ComBox firmware version 1.04
and higher is required to run in this configuration.
To configure Modbus Master Settings:
Click the arrow to the left of ComBox Configuration, then click Modbus Master.
The Modbus Master Configuration screen appears.
Communication Setup
Enable Modbus Master Mode toggles the Modbus Master Mode on or off. When
enabled, readings for Modbus devices are displayed on the Home screen.
Enable Modbus Master Serial Port toggles the Modbus Master Serial Port Mode
on or off. If slave is enabled on the serial port, the master will be disabled
because it is not possible to have master and slave on the same hardware port.
Also, if the slave serial port is already enabled when the master serial is enabled,
the slave serial port will automatically be disabled.
Figure 3-5 Communication Setup Options Screen