In this session, you'll learn: SCADA – Understanding communication at the advanced level

1. Industrial Automation
Training
Session 08 – Communication
Protocols

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SCADA – Understanding communication at advanced level
Agenda

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From SCADA

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How does SCADA offer higher level of control & Monitoring
WAN & LAN
Local Area Network Wide Area Network
Local areas only (Within plant) Large geographic areas (e.g., cities, states, )
High speed (1000 mbps) Less speed (150 mbps)
LANs have a high data transfer rate. WANs have a lower data transfer rate
compared to LANs.
Tend to use certain connectivity
technologies, primarily Ethernet and Token
Ring
WANs tend to use technologies like MPLS,
ATM, Frame Relay and X.25 for connectivity
over longer distances
One LAN can be connected to other LANs
over any distance via telephone lines and
radio waves.
Computers connected to a wide-area network
are often connected through public networks,
such as the telephone system. They can also
be connected through leased lines or
satellites.
Layer 2 devices like switches and bridges.
Layer 1 devices like hubs and repeaters.
Layers 3 devices Routers, Multi-layer
Switches and Technology specific devices like
ATM or Frame-relay Switches etc.

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LAN Network
L2 – Switch :
Media Access Control
These bridges also ensure that frames
destined for MAC addresses that lie on
the same port as the originating station
are not forwarded to the other ports. For
the sake of this discussion, we consider
only Ethernet LANs.

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WAN
L3-Open Shortest Path First (OSPF) or
Routing Information Protocol (RIP)
Simple Network Management Protocol
Media Access Control
These bridges also ensure that frames
destined for MAC addresses that lie on
the same port as the originating station
are not forwarded to the other ports. For
the sake of this discussion, we consider
only Ethernet LANs.

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Network Topologies - Bus topology

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Ring Topology

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Star Topology

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Mesh Topology
Mesh has n(n-1)/2 physical channels to link n devices.

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Tree Topology

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Application- Analysis of network

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Case Study : IED Devices with SCADA
Generic Method

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Traditional circuits

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ACSI

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GOOSE – IEC61850

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Topics to be covered in next session
•Different types of control system
•Loops & Controls

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Thank you!