SCADA Model System Components PLC RTU Protocols

SCADA Model System Components

1. 1
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
SCADA MODEL
SYSTEM COMPONENTS
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY

2. 2
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
RTU Remote Terminal Unit
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
What is a RTU?
Where does it fit in a SCADA System?
RTU components
Basic types of RTU modules

3. 3
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
RTU Components
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Power supply
Back-up battery
Radio module
4 –15 I/O modules

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
RTU Modules
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Digital Modules –two I/O states
Digital Monitor Module (DMM)
Digital Control Module (DCM)
Pulse Accumulator Module (PAM)

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
RTU Modules
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Support Modules –no I/O functions
Power Supply Module (PSM)
Radio Interface Module (RIM)
Computer Interface Module (CIM)
Bus Extender Module (BIM)

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
RTU Modules
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Analog Modules –numerical control/monitor
Analog Monitor Module (AMM)
Analog Control Module (ACM)

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
RTU Modules
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Controllers –Logical modules perform complete closed
loop, automatic control functions
Pump Control Module (PCM)
Programmable Logic Controller (PLC)
Pump Control Unit (PCU)

8. 8
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
PLC Programmable Logic Controller
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
What is a PLC?
History of PLCs
Where does it fit in SCADA Systems?
PLC architecture

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
PLC Architecture
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Control
unit
Input
devices
Output
devices
Data
memory
Program
memory
Process actuators
Process sensors
Programming module or PC

10. 10
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
MTU Master Terminal Unit
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
What is a MTU?
Where does it fit in a SCADA System?
MTU components

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
MTU Components
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Operator
Personal Computer
Human Machine Interface (HMI)
Historical Datalogging
Monitoring
Limited Control

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
COMMUNICATION
SYSTEMS
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
PSTN Network
Leased Lines
Internet
Wireless
LAN
Global System for Mobiles (GSM)
Radio modems

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
COMMUNICATION
COMPONENTS
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
FieldBus
What is FieldBus?
History of FieldBus
Advantages
Topologies (Bus/Daisy Chain/Tree)
Where does it fit in a SCADA System?

14. 14
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
FIELDBUS
What it is?
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
It is a BUS.
A wire or set of wires connecting more than
two devices
Replace existing 4-20 mA analogue signal
Serial Bus
Digital communication between devices

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
FIELDBUS
History
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
1940s pressure signals 3-15 psi
1960s the 4-20 mA analogue signals
1970s digital processors for centralized
control.

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
FIELDBUS
Advantages
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Reduces wiring
Online diagnostics out on individual field
devices
Two-way communication between the field
devices and the controllers
Deterministic –no collision and it is scheduled
It is getting widely used in process control

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
FIELDBUS
TOPOLOGIES
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY

18. 18
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
FIELDBUS
TOPOLOGIES
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY

19. 19
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
FIELDBUS
TOPOLOGIES
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY

20. 20
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
FIELDBUS
TOPOLOGIES
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY

21. 21
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
COMMUNICATION
COMPONENTS
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Ethernet
What is Ethernet?
History of Ethernet
Non-deterministic
Topologies
Where does it fit in a SCADA System?

22. 22
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
ETHERNET
What it is?
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Type of network cabling
It is a Local Area Network LAN
It is the Physical and the Data Link Layer

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
ETHERNET
History
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
XEROX in the 1970’s
Network cabling and signaling
IEEE 802.3 standard

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
ETHERNET
Topology
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Thick Ethernet Segment –Bus Topology

25. 25
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
ETHERNET
Topology
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Thin Ethernet Segment –Bus Topology

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
ETHERNET
Topology
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
10Base-T (also Fiber) –Star Topology

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
COMMUNICATION
PROTOCOLS
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
User Datagram Protocol (UDP)
Modicon Bus (MODBUS)
Distributed Network Protocol (DNP 3.0)

28. 28
SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
Protocol Defined
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
A set of conventions governing the treatment and
expecially the formatting of data in an electronic
communication system.
(Merriam Webster 10
th
Ed.)

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COMPARISON OF NON-PROPRIETARY SCADA PROTOCOLS
Feature UDP DNP 3.0 MODBUS
OSI Layers 1 3 1
# Users Unlimited1000s >500
Time Stamped EventsNO YES NO
Peer 2 Peer NO YES NO
Unsolicited Slaves Do
Not Need To Be Polled
NO YES NO
Secure File TransferNO YES NO
Broadcast CapabilityYES YES NO
File SegmentationNO YES NO? (dnp users)

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
Data Framing
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
Modbus Data Frame

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SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)
Performance Characteristics
NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY
SPEED UDP
SECURITY DNP 3.0
FLEXIBILITY DNP 3.0
TEACHING CAPACITY?

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CONCLUSION
•Discussion/Questions