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

1SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)SCADA MODEL SYSTEM COMPONENETS (MATTHEW LESSARD, ILIA DORMISHEV, KRENAR KOMONI)

SCADA MODEL SCADA MODEL SYSTEM COMPONENTSSYSTEM COMPONENTS

NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITYNORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY


RTU RTU Remote Terminal UnitRemote Terminal Unit


What is a RTU?What is a RTU? Where does it fit in a SCADA System?Where does it fit in a SCADA System? RTU componentsRTU components Basic types of RTU modulesBasic types of RTU modules


RTU ComponentsRTU Components


Power supplyPower supply Back-up batteryBack-up battery Radio moduleRadio module 4 – 15 I/O modules4 – 15 I/O modules


RTU ModulesRTU Modules


Digital Modules – two I/O statesDigital Modules – two I/O states Digital Monitor Module (DMM)Digital Monitor Module (DMM) Digital Control Module (DCM)Digital Control Module (DCM) Pulse Accumulator Module (PAM)Pulse Accumulator Module (PAM)




Support Modules – no I/O functionsSupport Modules – no I/O functions Power Supply Module (PSM)Power Supply Module (PSM) Radio Interface Module (RIM)Radio Interface Module (RIM) Computer Interface Module (CIM)Computer Interface Module (CIM) Bus Extender Module (BIM)Bus Extender Module (BIM)




Analog Modules – numerical control/monitorAnalog Modules – numerical control/monitor Analog Monitor Module (AMM)Analog Monitor Module (AMM) Analog Control Module (ACM)Analog Control Module (ACM)




Controllers – Controllers – Logical modules perform complete closed Logical modules perform complete closed loop, automatic control functions loop, automatic control functions

Pump Control Module (PCM)Pump Control Module (PCM) Programmable Logic Controller (PLC)Programmable Logic Controller (PLC) Pump Control Unit (PCU)Pump Control Unit (PCU)


PLC PLC Programmable Logic ControllerProgrammable Logic Controller


What is a PLC?What is a PLC? History of PLCsHistory of PLCs Where does it fit in SCADA Systems?Where does it fit in SCADA Systems? PLC architecturePLC architecture


PLC ArchitecturePLC Architecture


ControlControlunitunit

InputInputdevicesdevices

OutputOutputdevicesdevices

DataDatamemorymemory

ProgramProgrammemorymemory

Process actuatorsProcess actuators

Process sensorsProcess sensors

Programming module or PCProgramming module or PC


MTU MTU Master Terminal UnitMaster Terminal Unit


What is a MTU?What is a MTU? Where does it fit in a SCADA System?Where does it fit in a SCADA System? MTU componentsMTU components


MTU ComponentsMTU Components


OperatorOperator Personal ComputerPersonal Computer Human Machine Interface (HMI)Human Machine Interface (HMI) Historical DataloggingHistorical Datalogging MonitoringMonitoring Limited ControlLimited Control


COMMUNICATION COMMUNICATION SYSTEMSSYSTEMS


PSTN NetworkPSTN Network Leased LinesLeased Lines InternetInternet WirelessWireless

LANLAN Global System for Mobiles (GSM)Global System for Mobiles (GSM) Radio modemsRadio modems


COMMUNICATION COMMUNICATION COMPONENTSCOMPONENTS


FieldBusFieldBus What is FieldBus?What is FieldBus? History of FieldBusHistory of FieldBus AdvantagesAdvantages Topologies (Bus/Daisy Chain/Tree)Topologies (Bus/Daisy Chain/Tree) Where does it fit in a SCADA System?Where does it fit in a SCADA System?


FIELDBUS FIELDBUS What it is?What it is?


It is a BUS.It is a BUS. A wire or set of wires connecting more than A wire or set of wires connecting more than two devices two devices

Replace existing 4-20 mA analogue signalReplace existing 4-20 mA analogue signal Serial BusSerial Bus Digital communication between devicesDigital communication between devices


FIELDBUS FIELDBUS HistoryHistory


1940s pressure signals 3-15 psi1940s pressure signals 3-15 psi 1960s the 4-20 mA analogue signals1960s the 4-20 mA analogue signals 1970s digital processors for centralized1970s digital processors for centralized control. control.


FIELDBUS FIELDBUS AdvantagesAdvantages


Reduces wiringReduces wiring Online diagnostics out on individual fieldOnline diagnostics out on individual field devices devices Two-way communication between the fieldTwo-way communication between the field devices and the controllers devices and the controllers Deterministic – no collision and it is scheduledDeterministic – no collision and it is scheduled It is getting widely used in process controlIt is getting widely used in process control


FIELDBUS FIELDBUS TOPOLOGIESTOPOLOGIES












COMMUNICATION COMMUNICATION COMPONENTSCOMPONENTS


EthernetEthernet What is Ethernet?What is Ethernet? History of EthernetHistory of Ethernet Non-deterministicNon-deterministic TopologiesTopologies Where does it fit in a SCADA System?Where does it fit in a SCADA System?


ETHERNET ETHERNET What it is?What it is?


Type of network cabling Type of network cabling It is a Local Area Network LANIt is a Local Area Network LAN It is the Physical and the Data Link LayerIt is the Physical and the Data Link Layer


ETHERNET ETHERNET HistoryHistory


XEROX in the 1970’sXEROX in the 1970’s Network cabling and signalingNetwork cabling and signaling IEEE 802.3 standardIEEE 802.3 standard


ETHERNET ETHERNET TopologyTopology


Thick Ethernet Segment – Bus TopologyThick Ethernet Segment – Bus Topology




Thin Ethernet Segment – Bus TopologyThin Ethernet Segment – Bus Topology




10Base-T (also Fiber) – Star Topology10Base-T (also Fiber) – Star Topology


COMMUNICATION COMMUNICATION PROTOCOLSPROTOCOLS


User Datagram Protocol (UDP)User Datagram Protocol (UDP) Modicon Bus (MODBUS)Modicon Bus (MODBUS) Distributed Network Protocol (DNP 3.0)Distributed Network Protocol (DNP 3.0)


Protocol DefinedProtocol Defined NORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITYNORWICH UNIVERISTY CENTER OF EXELLENCE IN DISTRIBUTED CONTROL SYSTEM SECURITY

A set of conventions governing the treatment and A set of conventions governing the treatment and expecially the formatting of data in an electronic expecially the formatting of data in an electronic communication system.communication system.

(Merriam Webster 10(Merriam Webster 10thth Ed.) Ed.)

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COMPARISON OF NON-PROPRIETARY SCADA PROTOCOLS

Feature UDP DNP 3.0 MODBUS

OSI Layers 1 3 1

# Users Unlimited 1000s >500

Time Stamped Events NO YES NO

Peer 2 Peer NO YES NO

Unsolicited Slaves Do Not Need To Be Polled

NO YES NO

Secure File Transfer NO YES NO

Broadcast Capability YES YES NO

File Segmentation NO YES NO? (dnp users)


Data FramingData Framing


Modbus Data FrameModbus Data Frame


Performance CharacteristicsPerformance Characteristics


SPEED SPEED UDP UDPSECURITY SECURITY DNP 3.0 DNP 3.0FLEXIBILITY FLEXIBILITY DNP 3.0 DNP 3.0

TEACHING CAPACITY?TEACHING CAPACITY?

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CONCLUSIONCONCLUSION

• Discussion/Questions

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

Documents

ilia dormishev

io modules

scada systems

plc architecture slide

complete closed loop

history of plcs