PROFINET Network Design - ... Siemens AG 2013. All Rights Reserved. PROFINET Network Design...

download PROFINET Network Design -   ... Siemens AG 2013. All Rights Reserved. PROFINET Network Design PROFINET is easy!

of 37

  • date post

    07-Feb-2018
  • Category

    Documents

  • view

    230
  • download

    7

Embed Size (px)

Transcript of PROFINET Network Design - ... Siemens AG 2013. All Rights Reserved. PROFINET Network Design...

  • Siemens AG 2013. All Rights Reserved.

    PROFINET Network DesignPROFINET is easy!

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    PROFINET completely uses all possibilities offered by Ethernet

    PROFINET is 100% Ethernet

    PROFINET is Ethernet Ethernet is the established standard in the IT world for fast

    exchange of data (IEEE 802.3) PROFINET is always full duplex simultaneous communication

    in two directions

    PROFINET is always "switched Ethernet"

    Distribution of network loadcan be influenced using topology

    As comparison: PROFIBUS One line to which all nodes

    are connectedPerformance directly

    dependent on number of nodesController

    Slaves

    Devices

    100 Mbit/s full duplex

    Switches connected into a line

    Master100 Mbit/s

    100 Mbit/s

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Mechanisms for real-time communication in PROFINET

    TCP/IP

    n-1 n21

    IO data

    Send cycle

    n-1 n21

    Next cycle

    Time scheduling

    Performance and deterministic behavior through priority assignment of I/O data

    Openness for every type of Ethernet communication TCP, UDP, IP, etc. Integration of Ethernet devices in machines and

    systems (Webcam, network printer, etc.)

    Open for any communication

    Separate channels for IO data and TCP/IP

    Real-time and standard on one cable = totally integrated uniformity

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    PROFINET technology at a glance: Ethernet

    PROFINET is 100% switched Ethernet

    PROFINET uses IT standards such as TCP/IP

    PROFINET is real-time and deterministic

    TCP/IP

    n-1 n21

    IO data

    Ethernetheader

    IPheader

    TCPheader Application data

    Ethernettrailer

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Basics - The ISO/OSI Reference Model

    App

    licat

    ion-

    orie

    nted

    Tran

    spor

    t-orie

    nted

    Layer 1 Physical

    A

    BData Link

    MAC

    LLCLayer 2

    NetworkLayer 3

    TransportLayer 4

    SessionLayer 5

    PresentationLayer 6

    ApplicationLayer 7

    Raw bit transmission layer

    The Ethernet specification includes layer 1 and 2a of the

    ISO/OSI reference model

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Basics - 100 Mbps Fast Ethernet

    Layer 1

    Layer 2

    Physical

    Ethernet Medium Access Control (MAC)

    Logical Link Control (LLC) B

    A

    100 Base TXTwisted pair

    100 Base T4Twisted pair

    100 Data rate 100 Mbps

    Base Signaling Baseband transmission

    XX Medium/length T4 Twisted pair with 4 wire pairsTX Twisted pair with 2 wire pairsFX Fiber-optic

    Nomenclature:

    100 Base FXFiber-optic

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Basics - 100 Base TX (Twisted Pair)

    According to IEEE 802.3 Clause 25:Shielded cable with two twisted wire pairs (in other words, 4 wires).The nodes are connected via a switch that provides a port for each node.

    Switch SwitchRJ-45 jack

    TP cable with RJ-45 plug

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Basics - 100 Base FX (optical FE)

    According to IEEE 802.3 Clause 26:Glass fiber cable for transmission of light/signals.The nodes are connected via a switch that provides a port for each node.

    Switch Switch

    Fiber-optic cable:Distance depending on fiber type and network component

    Examples: 3 km - multimode fiber (62.5/125 or 50/125 m) 26 km - single mode fiber (10/125 or 9/125 m)

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Basics - 1000 Mbps gigabit Ethernet

    Layer 1

    Layer 2

    Physical

    Ethernet Medium Access Control (MAC)

    Logical Link Control (LLC) B

    A

    1000 Base TTwisted pair

    1000 Base CXCoax

    1000 Base LXFiber-optic

    1000 Data rate 1000 Mbps

    Base Signaling Baseband transmission

    XX Medium/length T Twisted pairC Coaxial cableS Fiber-optic short waveL Fiber-optic long wave

    Nomenclature:

    1000 Base SXFiber-optic

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Transfer Media - Comparisons

    TwistedPairNetwork FibreOpticNetwork WirelessNetwork

    InterBuildingNetworking No Yes Yes

    SuitabilityforHighTransmissionRates Partly Yes No

    Max.NetworkExpansion 5000m Upto150km 1000m/segment

    Max.DistancebetweenTwoNetworkNodes 100m

    50mPOF100PCF

    3000mMultiMode15kmSingleMode

    30m/segment(indoor)100m/segment

    (outdoor)

    Max.ConnectingCableLength 100m

    50mPOF100PCF

    3000mMultiMode15kmSingleMode

    100mtoAP

    AssemblyOnsite WithoutSpecialTool WithSpecialTool SpecialistPersonnel

    RedundantNetworkStructures ElectricalRing OpticalRingUseofDifferentFrequencies(2.4Ghz/5Ghz)

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Design of the Industrial Twisted Pair cable

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Current Connector Technology (Cu) - RJ45

    RJ-XX Acronym from FCC for Registered Jack

    Pin(DTE)

    Signal(DTE)

    PROFINETcolour coding

    on cable connector

    1 TX+ yellow2 TX- orange3 RX+ white456 RX- blue78

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Current Connector Technology (Cu) - RJ45 Rugged

    Industrial Ethernet connector-technology RJ45 FC (Fast Connect)- Nose does not break-off

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Design of a Fibre Optic cable

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Industrial Ethernet Cable (FO) Classification

    Fibre longitudinal sectionwith typical steel propagation

    Refractive indexprofile

    Fibre cross section

    50um

    125um

    250um280um

    Core dia.: 100-300mCoating dia.: 200-1000me.g.: Plastic Optical Fibre (POF)

    Core dia.: 50 / 62,5 / 85 / 100mCoating dia.: 125 / 140me.g.: Glass Multi-Mode

    125um

    9um

    Core dia.: 8-10mCoating dia.:125-140me.g.: Glass Mono-Mode

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Latest Connector Technology (FO)

    ST Connector (Straight Tip)(ST = registered trademark of AT&T)orBFOC Connector (Bayonet Fiber Optic Connector)

    SC Connector (Subscriber Connector)

    Example:with 100 Base FX

    Example:with 1000 Base SXand 1000 Base LX

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Latest Connector Technology (FO)

    SFP Plug (Small Form-factor Pluggable)Also called mini-GBIC.1 x 1000 Mbit/s LC Port optical

    LC Plug (Lusent Connector)developed from the company Lucent Technologies

    Media Module for modular switches:2 x 100/1000 Mbit/s SFP slot

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Cable Installation (Cu)

    Category I ( 10cm from Cat.II and 20cm from Cat.III):Fieldbus and LAN cablesShielded cables for digital dataShielded cables for analog and digital signals ( 25V)Low voltage cables ( 60V)

    Category II ( 10cm from Cat.I and 20cm from Cat.III):Cable with DC voltage > 60V and 400VCable with AC voltage > 25V and 400V

    Category III ( 20cm from Cat.I and Cat.II):Cables with DC and AC voltage > 400V

    Category IV ( 50cm from all Categories):All cables from I to III above Direct danger of lightning strike

    Grounding is the same as PROFIBUS!

    Please see the PROFINET Installation Guideline for more info

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Basics - The ISO/OSI Reference Model

    App

    licat

    ion-

    orie

    nted

    Tran

    spor

    t-orie

    nted

    Layer 1 Physical

    A

    BData Link

    MAC

    LLCLayer 2

    NetworkLayer 3

    TransportLayer 4

    SessionLayer 5

    PresentationLayer 6

    ApplicationLayer 7

    Managing the data connection

    Access to the physical network formatting of the data

    The Ethernet specification includes layer 1 and 2a of the

    ISO/OSI reference model

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Basics - Ethernet Media Access Control (MAC)

    Media Access Control (Layer 2a) defines the formatting of the data (framing)and the medium access method.

    Structure of the MAC frame:8 bytes

    Ethernet frameMAC header

    Destinationaddress

    Sourceaddress

    Lengthor type

    Userdata FCS

    6 bytes 6 bytes 2 bytes 46 - 1500 bytes 4 bytes

    Preamble/SFD

    Preamble: For synchronizing the clock pulses of the station

    SFD (Start Frame Delimiter): Start pattern for the beginning of the frame

    Destination / source address Ethernet destination/source address (MAC)

    Length : Number of bytes in the data field

    Type: Protocol type of the higher-level layer (e.g.IPv4 = 0x0800)

    User data: (>46

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Basics - CSMA/CD

    In Ethernet, access to the cable is controlled using the methodCarrier Sense Multiple Access/Collision Detection (CSMA/CD)

    Function:1st step CS Carrier Sense:

    2nd step MA Multiple Access:

    Collision3rd step CD Collision Detection:

  • Siemens AG 2013. All Rights Reserved.Industry Sector

    Basics - Ethernet collision domain

    Since the nodes share the medium, Ethernet is known as a shared network. Collisionsare intended in the CSMA/CD method and therefore a property and not an error. Within a collision domain, all nodes share the network performance.

    Collision domain 1

    Collision d