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Title: Ethernet In Scada Systems
Author: David Crandall
Source: 2009 International School of Hydrocarbon Measurement
Year Published: 2009
Abstract: The explosive demand for information within enterprises has driven the control of SCADA systems networks beyond the exclusive domain of the SCADA department. Ethernet enables todays SCADA systems to provide real time data directly to the SCADA, Measurement, and Accounting groups which raises the need for additional security, industry standardization via OPC, and IT department involvement. The significance of these changes compared to past operating methods is that Measurement and Accounting now have access to real-time data with standard off the shelf software packages. This is accomplished from the same network the SCADA system utilizes to obtain its data. Disparate bits of data that required days and weeks to collect before being analyzed are now available instantly via Internet Explorer web browsers. The security of this data is of extreme importance and now the IT department demands the same or higher levels of security for the field as they do the front office. This means security measures must be enhanced within field devices going forward. One vendor has addressed security of its field device and added unique security features into its Ethernet port. Modern SCADA systems are based on an architecture that utilizes Ethernet communications permitting significant improvements in data availability which is driving the major operational gains in overall system performance.

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