Phoenix Contact RAD-900-DAIO6, User Manual, Page: 85 / 140

Configuration and startup
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– The RAD-900-DAIO6 may be used to create a point-to-point connection with another
RAD-900-DAIO6. In this case, one RAD-900-DAIO6 must have its address set to 01
and the other must be set to 02 .
Figure 5-15 Thumbwheel addressing of the RAD-900-DAIO6 in point-to-point mode
Wireless module in PLC/Modbus RTU mode
– Multiple RAD-900-DAIO6 devices may not use the same thumbwheel address in a
single network.
– The input and output data is saved in a Modbus memory map in the master wireless
module. You can read or write the process data via the serial interface of the master
wireless module (RAD ID = 01) using the Modbus RTU command. The process data
tables can be found starting at “Modbus memory map” on page 100.
5.8.2 RAD-900-DAIO6 in PLC/Modbus RTU dual mode
– Each wireless module is assigned a Modbus address. The Modbus address of each
module is that of the RAD-ID (yellow thumbwheel) set on the module. The master
wireless module Modbus address may be changed from 01 , if an existing Modbus
device is already assigned this address. A Modbus address may only appear once in
the network.
– Each RAD-900-DAIO6 device must use a unique thumbwheel address within a single
network.
– The input and output data is saved in a Modbus memory map in the wireless module.
You can read or write the process data via the serial interface of the master wireless
module (RAD ID = 01) using the Modbus RTU command. The process data tables can
be found starting at “Modbus memory map” on page 100.