The publication

The DNP User Group published the following news on December 2nd 2016:

The DNP Technical Committee has released the following Technical Bulletin (TB):

  • TB2016-004 Updated Unsolicited Reporting Requirements for Constrained Environments

The TB (dated November 29th 2016) makes minor changes to the DNP3 specification, describing that outstations may not always be able to communicate “immediately” due to constraints outside of the DNP3 protocol.

How does this affect WITS users?

This has no impact on WITS users.

How does this affect WITS vendors?

The only impact on WITS vendors is that their WITS Field Devices are now behaving closer to the DNP3 standard.

Further details

The DNP Technical Bulletin can be downloaded by members of the DNP User Group from

Please email if you have any questions.