Step 5 - Configure the DNP3 Settings

Finally, the DNP3 settings need to be configured for the protocol to operate according to the requirements of the SCADA system in use.

The settings are contained on at least four pages in WSOS. Five if DNP3 is being configured to run on an Ethernet port.

DNP3 configuration pages can be opened in WSOS by going to:

Display > Switchgear Communications > Protocols > DNP3

From there, there are four or five options available:

• DNP3 Communications Configuration

• DNP3 Point Configuration

• DNP3 Unsolicited

  NOTE: DNP3 Unsolicited response behavior has been corrected to correctly buffer when the Unsolicited max count for any Class is set to 256 and above. Unsolicited max count for any class set less than 255 was not impacted.

• DNP3 Transmission Services

• DNP3 IP Networking (If DNP3 is running on an Ethernet port)

Two more options are added to this menu when the DNP3 Security feature is enabled. They are:

• DNP3 Security Statistics

• DNP3 Secure Authentication

Generally, the recommended option is to open the DNP3 Communications Configuration page first which has buttons from where all the other configuration pages can be opened.

The default DNP3 settings have been carefully selected and very few must need to be changed for the protocol to run.

Probably the most critical setting is the DNP3 address on the Transmission Services page which is unique to each device.

The Master Station address on the DNP3 Unsolicited page is also required if Unsolicited Responses are either On or Forced.