About Stuart Combellack

Senior Software Engineer, Technolog Limited.

10-Nov-2016 WITS-IOT Blog

WITS-IOT is a complimentary protocol being developed by the WITS PSA to sit alongside WITS-DNP3, extending the reach of Telemetry systems down to smaller low-cost devices.

The basic concept is explained in this brief video:
WITS-IOT video

To go along with this development, we are keeping a blog up to date with current events during the development of the protocol:
WITS-IOT Blog

We are going to be reaching out to the wider WITS community soon along with […]

4-Nov-2016 WITS Expo 2016 – What Happened?

WITS Expo 2016

The WITS Expo is over and it was a great success.

We had 91 attendees listening to our ideas and direction for the WITS protocols. We gave an update on where WITS is now, why you should adopt WITS and what needs WITS-DNP3 is failing to satisfy. We talked about the WITS-DNP3 roadmap and what we are doing to update WITS-DNP3 in the short to medium term.

Finally we talked about WITS-IOT, our new […]

3-Nov-2016 Tips for Reading a Device Profile

Tips for Reading a Device Profile

Mark Davison from Terzo Digital has written an interesting and detailed article about reading device profiles.

You can read it here or read the original post here.

Thanks, Mark!

2-Nov-2016 Master Station and WITS Versions

Master Station and WITS Versions

Mark Davison from Terzo Digital has written a great article explaining which versions of WITS-DNP3 are supported by the two fully verified WITS Master Stations.

You can find it in the Certification menu or a from direct link here!

2-Sep-2016 WITS Expo 2016

-> Expo Teaser Video

WITS History

WITS was formed in 2003 with the aim of developing a single telemetry protocol allowing any Field Device to connect to any Master System. Seven years later WITS-DNP3 protocol development was completed and to date some 8,400 outstations have gone into service across five UK water companies.

Management of the new protocol was handed over to the WITS Protocol Standards Association (PSA) in 2010 and an elected group of volunteer […]

02-Sep-2016 Anglian Water Services Awards WITS-DNP3 Outstation Frameworks

Anglian Water Services has awarded five year frameworks for the supply of WITS-DNP3 outstations to multiple vendors. The frameworks cover the supply of telemetry outstations for the following asset types –

  • Lot 1: Compact data logger/outstation suitable to monitor infrastructure assets e.g. District Metering, Pressure and CSO’s
  • Lot 2: Compact outstation for monitoring small non-infrastructure assets e.g. Private Pumping Stations
  • Lot 3: Expandable outstation for monitoring medium to large infrastructure assets e.g. Water and […]

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 […]

Report of PSA activities 2013

BIENNIAL GENERAL MEETING 31/10/2013

Report of the work of the Association over the past 2 years – Ver 3 21/11/2013

Inception

Following the period of development of the Protocol, the Protocol Standards Association was formed on 27th September 2011 at Interim Committee Meeting #8. The first Committee meeting of the new PSA was held on 11th December 2011. The Committee then consisted of:

Vendors:

  • Andrew Scott – Serck Controls (now Schneider Electric)
  • Guy Fitzpatrick – ITT Water & Wastewater (now […]