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SCADA Architecture

SCADA Architecture. First Generation – Monolithic Second Generation – Distributed Third Generation – Networked. Monolithic SCADA Systems. Standalone systems with virtually no connectivity to other systems Communication protocols developed by vendors of RTU equipment

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SCADA Architecture

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  1. SCADA Architecture First Generation – Monolithic Second Generation – Distributed Third Generation – Networked

  2. Monolithic SCADA Systems Standalone systems with virtually no connectivity to other systems Communication protocols developed by vendors of RTU equipment Protocols have no functionality beyond that required

  3. Not feasible to intermingle other types of data traffic with RTU communications • Very limited connectivity to the SCADA master station by the system vendor • Use of two identically equipped mainframe systems, a primary and a backup

  4. First Generation SCADA System

  5. Distributed SCADA Systems • Vendor controlled, proprietary environment • Improvement in system miniaturization • LAN technology to distribute the processing across multiple systems • Distribution of system functions across multiple systems

  6. Networks not capable of reaching beyond the limits of the local environment Vendor creates its own network protocol External communications networks were limited to RTU protocols Improves the redundancy and reliability of the system

  7. Second Generation SCADA System

  8. Networked SCADA Systems Open system architecture Multiple networked systems, sharing master station functions Utilizing open standards and protocols Distribute SCADA functionality across a WAN

  9. Open standards eliminate multiple limitations Easier to connect to third party peripheral devices to the system or the network Use of WAN protocols for communication between the master station and communications equipment Disaster survivability

  10. Third Generation SCADA System

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