Connecting Modbus

1. In SourceFlow, drag a Modbus Read node.
2. Double-click the node, and then click next to Server to enter the information of your modbus server.

3. CLick Add, and then enter the information of the data to be connected.

Parameter	Description
Name	The display name of the node (for visual identification only).
Topic	Optional topic string passed to output messages.
Unit-Id	The Modbus slave ID of the target device (typically 1–247).
FC	Function code that specifies the Modbus action, e.g., FC 3 = Read Holding Registers.
Address	The starting register address to read from (usually zero-based).
Quantity	The number of consecutive registers to read.
Poll Rate	How often the node polls the Modbus device (e.g., every 10 seconds).
Delay to activate input	Optional delay before activating the input signal for polling.
Server	Reference to a configured Modbus server (IP, port, protocol, etc.).

4. Click Done.
5. Connect a debug node at the end.
6. Click Deploy at the upper-right corner, and then click Modbus Read node to trigger the flow.