DNP3 TCP Master

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Distributed Network Protocol 3 (DNP3) is a set of communications protocols used between components in process automation systems. It is primarily used for communications between a “master station” and Remote Terminal Units (RTUs) or Intelligent Electronic Devices (IEDs).

This example provides an Step by Step instructions on how to configure DNP3 functionality in RUTX11 device. In this RutX11 is configured as the TCP Master and DNP3 outstation to send data to a remote HTTPS server.


DNP3 can be installed using the package manager

Open the ‘Services’ tab and click the ‘Package Manager’ button. On DNP3 click the ‘+’ button to install DNP3 package. Networking rutx11 example DNP3 installing dnp3 package v1.png

After that navigate to Services→DNP3

Networking rutx11 example DNP3 service features v1.png

DNP3 Protocol contains two features. TCP MASTER and DNP3 OUTSTATION.


TCP Master requests specific information from DNP3 outstation through the communication channel.

To setup TCP MASTER click on the TCP Master Button and click ‘ADD’ to add a new master.

TCP Configuration

On this section we configure the parameters of the DNP3 Outstation that the Master will be querying with requests.

Requests Configuration

To obtain data from DNP3 Outstation configure a DNP3 instance. The DNP3 Master will send a request to DNP3 outstation specifying the function codes to be sent. The outstation then sends the requested data back to the DNP3 Master.

On the ‘ADD NEW INSTANCE SECTION’ type the name of the instance. In this example we want to read the serial number, so we type ‘serial’.

Refer to DNP3 Parameters and set the serial parameter.

The serial parameter is '5' with the group type 'octet string' and then ‘SAVE & APPLY’

TCP MASTER should look like this. Networking rux11 example DNP3 tcp master configurdv1.png


A DNP3 Outstation component communicates with a single master via a communication channel.

To configure the DNP3 Outstation Go to Services→ DNP3→ DNP3 OUTSTATION

DNP3 Outstation Configuration

NOTE: The Local Address and the Remote Address configuration in TCP Master and DNP3 Outstation are configured in reverse such that the Local address in TCP Master is the Remote address in the DNP3 Outstation and vice versa.


To test DNP3 protocol set up an account with the beeceptor and create an endpoint. Networking rutx11 example DNP3 endpoint creating beeceptor v1.png

Create the DNP3 Testing endpoint and copy the generated endpoint link as shown below. Networking rutx11 example DNP3 dnp3testing endpoint v1.png

Data to Server

Navigate to Services → Data to Server and set up the server.

Set the JSON according to the kind of data you want to include. For this example, we will use.

{"Date": "%d", "Remote IP": %r, "Data": %o}

Proceed to beeceptor to check the results

Networking rutx11 example DNP3 dnp3testing beeceptor post v1.png

Click on POST to check the results. You should see results like this. Networking rutx11 example DNP3 dnp3testing results v1.png