LoRa Node
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2.4 Modbus Configuration
The IOT400 series product provides one RS-485 port for connecting with Modbus RTU Slave devices. It can
handle up to three sets of cascaded Modbus devices.
RS-485 Serial Port Configuration
Prior to configure how to access the Modbus devices, you need to define the physical communication port
first. In RS-485 configuration, you can enable the
Interface
, and then select desired values for
Baud Rate, Data
Bits, Stop Bits
, and
Parity
settings.
Interface
: By default, the interface is disabled. You can enable it and set the interface parameter to
comply with the devices to be connected.
Baud Rate
: Select the appropriate baud rate for serial device communication. It can be 1200 / 2400 /
4800 / 9600 / 19200 / 38400 / 57600 / 115200. It depends on the cable length and the
installed environment. The longer cable length will result in lower baud rate for it. By
default, 9600 is selected.
Data Bits
: Select 7 or 8 for data bits. 8 is selected by default.
Stop Bits
: Select 1 or 2 for data bits. 1 is selected by default.
Parity
:
Select None / Even / Odd for Parity bit. None is selected by default.
