PLC/Modbus RTU mode
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7 PLC/Modbus RTU mode
Activate the PLC/Modbus RTU mode using the PSI-CONF software (from Section 5.6,
“Configuration via PSI-CONF software” onwards).
In PLC/Modbus RTU mode, you can read the I/O values of the extension modules con-
nected to the wireless slave modules via the Modbus RTU protocol (I/O to serial). The wire-
less module provides an RS-232 or RS-485 interface for this purpose. In PLC/Modbus RTU
mode, the master wireless module works as a Modbus slave and has its own Modbus slave
address.
You can connect I/O extension modules to each wireless device in the network. A wireless
network can have a maximum of 99 extension modules. Use the white thumbwheel to set
the I/O-MAP addresses.
Figure 7-1 PLC/Modbus RTU mode
The PLC/Modbus RTU mode is available for firmware version 1.30 or later. If necessary,
start an update using the PSI-CONF software (version 2.03 or later).
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