42/24-10 EN Rev. 9 Chapter 7: Gas Analyzer Configuration 7-C-13
Configuring a Modbus Connection
Menu Path MENU → Configure → System → Network → Modbus
Figure 7-C-3
Modbus
Configuration
Function The gas analyzer can be connected to a network with Modbus protocol via the
RS232 or the RS485 interface.
The RS232/ RS485 module must be installed in the gas analyzer. Only then the
Modbus menu item is displayed.
Parameters The gas analyzer supports the Modbus slave protocol with RTU (remote terminal
unit) mode. The Modbus access interval should be >500 ms.
The Modbus address can be set in the 1-255 range.
For Modbus type, select the interface which connects the gas analyzer to the
Modbus network (RS232 or RS485).
The data transfer default settings are shown in Figure 7-C-3.
For additional Modbus information see the “AO2000 Modbus and AO-MDDE”
technical bulletin (Publication No. 30/24-316 EN).
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