User's Guide

12
Modbus RS485
bridge LoRaWAN
If this mode is enabled, the device will transmit Modbus RTU commands
from the network server to RS485 terminal devices transparently and send
Modbus reply originally back to the network server.
Port: Select from 2-84, 86-223.
3. Click to add Modbus channels, then save configurations.
Parameters
Description
Channel ID
Select the channel ID you want to configure from 16 channels.
Name
Customize the name to identify every Modbus channel.
Slave ID
Set Modbus slave ID of a terminal device.
Address
The starting address for reading.
Quantity
Set read how many digits from starting address, it fixes to 1.
Type
Select the data type of Modbus channels.
Byte Order
Set the Modbus data reading order if you configure the type as Input register
or holding register.
INT32/Float: ABCD, CDBA, BADC, DCBA
INT16: AB, BA
Sign
The tick indicates that the value has a plus or minus sign.
Fetch
After clicking, UC100 will send Modbus read command to test if it can read
correct values.
Example: as this setting, the device will send command: 01 03 00 00 00 01
84 0A
4. Click “Fetch” to check if UC100 can read correct data from terminal devices.
Note: Do not click “Fetch” frequently since the response time to reply is differ for every terminal
device.