Releases of the WITS standard, including Technical Bulletins (TB) and Information Bulletins (IB).

16-Oct-2018 WITS-IoT Protocol published at version 1.0

Executive Summary

WITS-IoT is a new protocol from the WITS PSA (Protocol Standards Association). WITS-IoT is aimed at lower power, less expensive devices and provides an application layer veneer on standard IoT technology. Although the application level functions provided by the protocol stem from its inception in the UK Water industry, it is broadly applicable to general telemetry within the entire Industrial Internet of Things (IIoT). So, for example, the protocol functions include reading […]

14-Jun-2018 WITS-DNP3 V3.0 Master Station Timescales

Version 3.0 of WITS-DNP3 was released sometime ago. However, up till this point, neither Master Station supported that later version. At the last WITS Strategy Meeting in May 2018 at NIW in Belfast, both Master Station manufacturers were asked to come prepared to discuss their rollout plans and when WITS-DNP3 version 3.0 may feature in those plans.

We are pleased to announce that both Master Station manufacturers have WITS 3.0 on their development horizons. At […]

10-Apr-2018 New WITS Technical Bulletin TB#62: Clarifications and Corrections

Today, the WITS-PSA has published the results of our work to clarify some points within WITS-DNP3. The updated Technical Bulletin is as follows:

TB #62 – Clarifications and Corrections

There are a number of comments and PSAC “tickets” that have been raised because of errors or misunderstandings with the contents of the Application Notes. This TB adds clarification comments and corrections to the Notes and the Test Specification.

To download the updated documentation, log-in to the website […]

18-Jun-2017 New WITS Technical Bulletin TB#61: Clarification on Extended Data Points

Today, the WITS-PSA has published the results of our work to clarify some points within WITS-DNP3. The updated Technical Bulletin is as follows:

TB #61 – Clarifications on the use of Extended Data Points when there are no valid values of the source point.

In addition, the Technical Bulletin index has been updated to include this enhancement.

To download the updated documentation, log-in to the website to access the Members section. Then from the “Members” […]

03-May-2017 DNP3 TB2016-005 information for WITS members

The publication

The DNP User Group published the following news on December 28th 2016:

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

  • TB2016-005 Indicating Invalid Floating-point Data in Object Group 0 Variations

TB2013-004 introduced some new Object Group 0 Variations that are used to report GPS data from an outstation (latitude and longitude). Questions arose about how an outstation should use these objects if it cannot get a GPS fix to the required number […]

03-May-2017 DNP3 TB2016-004 information for WITS members

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 […]

04-Jan-2017 New WITS Technical Bulletins Published (TBs 56-60)

Today, the WITS-PSA has published the final results of many months of work, standardising some important new features into WITS-DNP3.  These include recommendations for operating WITS-DNP3 in an optimised manner and transients recording (high speed recording and triggering data send after an incident condition).  The updated Technical Bulletins are as follows:

TB #56 – Defining how to use WITS-DNP3 in an optimised manner.

TB #57 – Adding incident logs and significant change logs (transients recording).

TB #58 – […]

01-Sep-2016 DNP3 Technical Bulletin TB2016-003 – Information for WITS members

The publication

The DNP User Group published the following news on June 7th 2016:

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

  • TB2016-003 Updated Subset Parsing Tables

The TB (dated May 18th 2016) describes the master station requests and outstation responses that are implemented by devices conformant to the various DNP subset levels. The details existing in the current DNP3 standard (IEEE 1815‑2012) have been reformatted to improve comprehension. The new tables also contain the […]

01-Sep-2016 DNP3 Technical Bulletin TB2016-002 – Information for WITS members

The publication

The DNP User Group published the following news on May 27th 2016:

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

  • TB2016-002 Addressing Deficiencies in DNP3-SAv5

The TB (dated May 18th 2016) describes a number of interoperability problems and vulnerabilities identified in Secure Authentication version 5 procedures (SAv5). Some of the deficiencies and vulnerabilities can be corrected with explanations about how to use the SAv5 functions (which may result in code changes to […]

01-Sep-2016 DNP3 Technical Bulletin TB2016-001 – Information for WITS members

The publication

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

As a result of Vote2016-01 (where User Group members gave a positive vote for a document change), the DNP Technical Committee has released the following Technical Bulletin (TB):

  • TB2016-001 Update of Internal Indications 2.0, 2.1, and 2.2

The TB (dated March 2nd 2016) describes the expected behaviour of an outstation when it receives a read request for data that it does not have.

How does this […]