Monday, September 13, 2010

SCADA Protocols Continue to Evolve





As evidenced by the new edition of IEC 60870-5-101, work is going on to improve these protocols. The DNP3 Technical committee has published a series of technical bulletins and other document since 1995 that contain clarifications and extensions to the protocol. The DNP3 protocol specification is presently being updated to incorporate this material. The new specification is presently being updated to incorporate this material. The new specifications have been progressively released.

Standardize conformance testing has boosted to end user’s confidence that devices from different vendors will work together. The DNP3 Technical Committee first published a conformance test procedure for master stations scheduled for completion in 2006. An amendment to IEC 60870-5-104 is currently in production

To clarify probably various masters associated with connection management.
Other development work continues in SCADA protocol standard today. Current work items on both committees list include:
• Improved security (especially validation of authorization of control commands).
• Configuration definition (machine readable/automatic configuration) to simplify system integration.

IEC 61850 is a substation automation protocol designed to allow sharing of data between substation devices. It is specifically intended to support the sharing of high-speed protection devices. Protection schemes require sharing of data between devices to occur in a very short time, typically less than 4ms.


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