1. DNP 3.0 solution for CitectSCADA
Jens Nasholm
Citect Pty Ltd 1

2. CitectSCADA and DNP
There is currently a new and an old version of the DNP driver supporting the DNP 3.0 standard
DNPr – New driver with full support for redundancy
DNP – Old
The DNPr driver is a native driver able to communicate with any device compliant with the DNP 3.0 standard
From January 1, 2006 a Specialty Driver support contract is required to log DNPr support calls

3. Old DNP Driver Driver Name: DNP (Latest version: 1.04.09.001)
Overview:
Used successfully by some customers
Quality and functionality ok for these customers
No redundancy
Solution:
Upgrade existing systems to new version of the DNP driver
This driver should not be used in new CitectSCADA projects
Support:
This driver is not supported and customers will be asked to upgrade to the new version of the DNP driver

4. New DNPr Driver Driver Name: DNPr (Latest version: 3.01.07.000)
Overview:
Used by majority of customers
Full support for PLC type redundancy
New features and number of defects resolved
Solution:
Where possible, the DNPr driver should be used
Driver ships with CitectSCADA v6.1
Support:
Supported by Citect Pty Ltd
From January 2006 a Support contract is required
DNP technical specialists available within Citect Pty Ltd
Defects will be prioritized and resolved based on severity

5. DNPr – New features Time stamped Trends
Trend events (Value & Time) are pushed directly to the CitectSCADA trend system through API
No need for customer written Cicode – all handled by the DNPr driver
Record with 1ms accuracy both analog and digital data for display in either the trending system or process analyst
Optimizes data storage by only saving values that are inserted (or changed)
Trend files automatically expand to fit data
No polling load on CitectSCADA

6. DNPr – New features Time stamped Alarms
Alarm events (State & Time) pushed directly to the alarm system through API
No need for customer written Cicode – all handled by the DNPr driver
Record with 1ms accuracy both analog and digital Alarms logged from RTU devices
No polling load on CitectSCADA

7. DNPr – New features Support of calculated variables
Calculations can be made within the cache before pushed into CitectSCADA
RealPower = Voltage x Current x PowerFactor (where Power factor is 0.85)
Timestamp set to latest time from set of variables

8. DNPr – New features Redundancy
I/O Server level redundancy provides PLC type redundancy
No custom redundancy logics, such as dual-master logic, coding in the RTU required
The driver maintains a database of values received from devices known as the cache
The cache is updated by both event and static data
The cache is automatically updated between the I/O Servers upon change of data in the DNP devices

9. DNPr – New features Redundancy (cont’d)
Redundancy managed through “Active State Detection” of units and exclusive port access mode
A unit becomes active if either of the following occurs
Communication between the I/O Devices fails
The unit is forced into the active state by the user
If a unit on an I/O Device is not active
No communication with I/O devices.
It does not send any DNP3 frames to the device and does not process any frames received from the device
I/O Servers communicate with each other to ensure that a unit is active on only I/O Server at one time

10. DNPr statistics Bluescope Steel Australia
2 redundant I/O servers connected via TCP/IP to 40 RTUs
2 redundant Alarm/Report/Trend servers
9000 DNP RTU tags
5000 DNP RTU calculated variables
7000 push-based digital alarms
3000 poll-based digital alarms
5000 event trends
6000 periodic trends
RTU events are populated to the SCADA system at a rate of 220 events per second in peak load situations

11. Sample of CitectSCADA and DNPr users
Agility Gas Services
Barwon Region Water Authority
Booz Allen Hamilton
Cairns Water
City of Cape Town
Ergon Energy - Brisbane
Erie Boulevard Hydropower
French Broad EMC
GasNet Australia Limited
Goulburn Valley Water Authority
Origin Energy - Katnook Gas Plant
Origin Energy Spring Gully
Power & Water - Sadadeen Valley
Queensland Railways
Shrewsbury Light and Cable
Texas Gas Transmission
Transend Power Stations
Transend Networks
TrustPower Generation
Western Power
Iran Khodro Substation Telemetry
Kangan Power Plant
Mashhad Powerplant Wells
Sistan & Baloochestan Dispatching Centre