Comparison_DNP_60870_61850.pdfVIP

2002-02-02 ? SCC 2002 Page 1 of 20 Comparison of IEC 60870-5-101/-103/-104, DNP3, and IEC 60870-6-TASE.2 with IEC 618501 Karlheinz Schwarz, SCC schwarz@scc-online.de www.scc-online.de February 02, 2002 1 Executive Summary SCADA protocols have traditionally been designed to optimize bandwidth (num- ber of bytes on the wire) and hardware utilization (processor speeds, RAM and ROM space). IEC 60870-5 and DNP3 emerged from a broad family of proprietary protocols for Data Acquisition (Data Collection) to provide a first level of Data Acquisition Interoperability. Increased number of points implies higher costs for maintaining databases, com- missioning costs in verifying points. More applications are accessing the data and the complexity of the applications has increased. Deregulation will only add to the complexity through increased information sharing. With traditional SCADA proto- cols the meaning of the points is located in various places: configuration of RTU and/or IED, configuration of databases, and configuration of applications. The Management of this complex information (definition, validation, interpretation, and use) is costly and time-consuming. Easier Management and Integration of the Information has become a crucial requirement. Technology advancements in hardware, software, and communications has shifted the focus in SCADA appli- cations from Data Acquisition to Information Management. IEC 618502 meets the requirements for an integrated Information Management, providing the user with consistent Knowledge of the System on-line – rather than just Gigabytes of raw data values. IEC 61850 defines standardized Informa- tion Models across vendors. Self-description and Meta-Data allow for on-line Validation. Objects are accessed by name, rather than user/vendor/model specific point numbers. Thus Database Validation can become highly automated, without vendor configuration files. 1 This is the 2nd vers