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How to select which network or networks ?

How to select which network or networks ?. NetLinx Offers Flexible Options. EtherNet/IP DeviceNet. EtherNet/IP ControlNet. ControlNet DeviceNet. DeviceNet. ControlNet. EtherNet/IP. EtherNet/IP. ControlNet. Mix and Match to fit your application!. DeviceNet. Application No. 1.

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How to select which network or networks ?

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  1. How to select which networkor networks ? CIG University III - 1999

  2. NetLinx Offers Flexible Options EtherNet/IP DeviceNet EtherNet/IP ControlNet ControlNet DeviceNet DeviceNet ControlNet EtherNet/IP EtherNet/IP ControlNet Mix and Match to fit your application! DeviceNet Application No. 1 Application No. 2 Application No. 3 Application No. 4 Application No. 5 Application No. 6

  3. Network Positioning EtherNet/IP Past/Present: Link to MES/ERP,Used for Programming, Controller to HMI, Some Controller to Controller, Present/Future: Present functionality, Controller to HMI, Controller to Controller Communications, and I/O. Backbone for lower-level networks. ControlNet Past/Present: Backbone, I/O, Controller to Controller, Controller to HMI, Programming, Information Messaging Present/Future: High-performance, robust, secure network primarily for I/O and interlocking. Backbone for lower-level networks. DeviceNet Past/Present: Simple distributed I/O devices, HMI, and 3rd Party devices supporting configuration and diagnostics Present/Future: Present functionality and make it easier to user while providing lower node / installation / maintenance cost

  4. Strengths of DeviceNet Strengths of DeviceNet • Lower Acquisition and Installation Cost • Reduction in plant wiring (eliminates hardwiring of I/O) • Lower installation, start-up, and maintenance times • Network Attributes • Data flow is governed by the Producer/Consumer model • Ability to link smart factory floor devices together • Ability to bridge to higher level networks • Superior device level diagnostics • Device Plug and Play capabilities - add or remove nodes on the fly • Optimized to handle small amounts of data • 8 bytes per message • supports message fragmentation for larger data sizes) • Media Options • Passive bus media: nodes can enter and leave without affecting the network • Sealed (IP67) and unsealed (IP65) media • Low cost flat media

  5. Strengths of ControlNet Strengths of ControlNet • High Speed Determinism • Deterministic data transfer - know when the data will arrive (Scheduled services) • Repeatable data transfer - transmission times are consistent as devices enter and leave the network • Redundancy • Redundant media is available • Processor redundancy • PLC-5 Hot Backup • ControlLogix Processor Redundancy • Industrial Hardened Physical Media • High noise immunity (coaxial and fiber optic cabling) • Intrinsically-safe media and products (Flex Ex, fiber optic repeaters) • Sealed (IP67) media currently being developed • Passive Media • Nodes can enter and leave without affecting the network • Trunkline topology

  6. Strengths of EtherNet/IP Strengths of EtherNet/IP • Highly efficient data transfer • Increased baud rates (10Mb, 100Mb), use of switches (instead of hubs), full duplex data transmission to minimize effect of message collisions, and isolation from the office Ethernet network • Use of commercial off the shelf products and technology • Common set of installation and support tools • Well established network standard, acceptance rate should be favorable • Can take advantage of web browsing services in the products • Media Options • Active bus media: supports star network topologies • High noise immunity (fiber optic cabling) • Extend bus length with multiple switches (copper and fiber) • Sealed (IP67) media - emerging technology (Consortia lead by RA)

  7. General Network Selection Guidelines • EtherNet/IP – more complex devices and larger I/O count blocks and racks where a combination of medium to high performance I/O and a large amount of messaging is required • ControlNet – more complex devices and larger I/O count blocks and racks where highly deterministic I/O performance with some messaging is required • DeviceNet – simple distributed devices and small I/O count blocks installed along side electrical/mechanical equipment There is no absolute answer!

  8. Network Selection Criteria Application complexity Topology Number of nodes Length Layout I/O Densities Product Availability From multiple vendors Device Types Performance Media options Copper Fiber Power Cost Technology MTTR Bridging/Routing ability Configuration Diagnostics Network Node Training Support capability Troubleshooting Tools Supporting organization(s) Consortia Companies Standardization

  9. NetLinx Architecture - Summary • Based on open networking standards • Global multi-vendor support • Utilizes the Producer/Consumer communication model • Consistent set of services that are media independent • Open connectivity throughout the manufacturing enterprise EtherNet/IP Information ControlNet Automation and Control DeviceNet Discrete Device Process Device “From the Internet to DeviceNet”

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