DNP3 (Distributed Network Protocol) is a set of communications protocols used between components in process automation systems. Its main use is in utilities. The data, examples and diagrams in this manual are included solely for the concept or product description and are not to be deemed as a statement of. IEEE STD. (DNP3) TUTORIAL. Date: May 17, – Sunday am –5: 30 pm. Event: IEEE Substations Committee Annual Meeting.

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For example, floating point number variants are available, so there is no need to map the number on to a pair of 16 bit registers. The reading of the classes can all be performed together or each class can be read at a different rate, providing a mechanism to create different reporting priorities for the different classes.

Weather stations based on Campbell Scientific data loggers are used worldwide because of their capability, flexibility, accuracy, and reliability. Paul enjoys leveraging unique Campbell Scientific technology to solve challenging measurement problems. This improves compatibility and eliminates problems such as endianness. Also, SCADA concepts are technically simple but field applications that integrate several types of equipment can become complex to set up or troubleshoot due to variances in vendor implementations.

Paul also enjoys the outdoors, fly fishing, and spending time with his family.

Overview of the DNP3 Protocol

Set up your preferences for receiving email notifications when new blog articles are posted that match your areas of interest. Tuyorial IEC was still under development and had not been standardized, there was a need to create a standard that would allow interoperability between various vendors’ SCADA components for the electrical grid.


It makes heavy use of cyclic redundancy check codes to detect errors. Look for more articles in the future with further DNP3 protocol implementation details and tips. The DNP Protocol has time stamped variants of all point data objects so that even with infrequent RTU polling, it is still possible to receive enough data to reconstruct a sequence of events of what happened in between the polls.

This standard was subsequently withdrawn March 27, The protocol is robust, efficient, and compatible with a wide range of equipment, but has become more complex and subtle over time. More standards are planned and volunteers are warmly accepted at any level of experience. Because smart grid applications generally assume access by third parties to the same physical networks and underlying IP infrastructure of the grid, much work has been done to add Secure Authentication features to the DNP3 protocol.

Where is DNP3 used? For a number of years, our data loggers have supported the DNP3 protocol. DNP3 has been designed to be as close to ndp3 as possible to the standards as they existed at time of development with the addition of functionality not identified in Europe but needed for current and future North American applications e.

Getting to Know DNP3

Views Read Edit View history. It was developed for communications between various types of data acquisition and control equipment. As part of these engagements, he has developed an effective methodology for roadmap development that includes technology assessments, standards maturity, gap analysis, regulatory compliance and risk assessments.

Although the protocol was designed tuotrial be very reliable, it was not designed to be secure from attacks by hackers and other malevolent forces that could potentially wish to disrupt control systems to disable critical infrastructure. It provides multiplexing, data fragmentation, error checking, link control, prioritization, and layer 2 addressing services for user data.


The focus of this extensive library was to eliminate the need for bit-mapping data over other objects, as is often done in many Modbus installations. The DNP3 protocol is commonly used to report event and historical data to SCADA systems in the water and energy sectors in the United States, as well as in other uttorial throughout the world.

He assists utilities with all aspects of substation automation system engineering, procurement and construction. Complete, comprehensive documentation of the protocol is available to the public. Its main use is in utilities such as electric and water companies. The improved bandwidth efficiency is accomplished through event oriented data reporting.

Send questions or comments to the Webmaster. The Remote Terminal Unit monitors data points and generates events when it determines that the data should be reported for example, when it changes value. After an Integrity Poll, only significant data changes are sent. These events are each placed snp3 one of three buffers, associated with “Classes” 1, 2 and 3. View all articles by this author. DNP3 is an open and public protocol.

How is DNP3 different from Modbus? This includes conceptual design; cost justification; technology assessments; equipment specification, procurement and selection; system architecture for substation networks of all kinds; cyber security; detailed design including logic, drawing development, and programming; testing; and commissioning.