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Transcript
Evolution of NeSSI End User Value Gen III Circa 200? Gen II Circa 2005 Micro Analytical (enabled by Technology Advances) At the Pipe (enabled by Intrinsic Safety) Smart Devices (enabled by Communication Standard) We are Here Gen I Now Rick Ales 4/21/2003 Miniature/Modular (enabled by Mechanical Standard) © Swagelok Company, 2002 Intrinsically Safe Network Dilemma Existing IS Networks: – ControlNet – Foundation Fieldbus – Profibus PA – HART These Networks are: – Too big, – Too complicated – Too expensive! Rick Ales 4/21/2003 © Swagelok Company, 2002 Why DeviceNet? • • • • • • • • • Up to 64 Nodes. 500 m @ 125Kb, 100 m @ 500Kb. 8 byte network length, fragmentation application. Linear trunk / drop line. Power & signal on same cable. 24Vdc @ 8A Peer to Peer or Master/Slave. Remove & replace under power. Hazardous area classification is Class 1 Div 2 Open standard administered by ODVA. SMALL, SIMPLE & CHEAP!! – 5-10 times cheaper than other industrial networks. Rick Ales 4/21/2003 © Swagelok Company, 2002 Why Not DeviceNet? • Not rated Class 1 Div 1 • A factory automation protocol. Rick Ales 4/21/2003 © Swagelok Company, 2002 NeSSI Sensor Bus Choices Make a Class 1 Div 1 network (ie. Foundation Fieldbus, Profibus PA, Hart, or ControlNet) small and cheap or … Use Class 1 Div 2 DeviceNet in an enclosure rated for hazardous environments or … Make DeviceNet Class 1 Div 1 Rick Ales 4/21/2003 © Swagelok Company, 2002 DeviceNet Overview • DeviceNet is an open industrial networks built upon the Common Industrial Protocol (CIP). – DeviceNet is managed by ODVA. – ControlNet is managed by ControlNet International – EtherNet/IP jointly managed by ControlNet International & ODVA User & Application Layers Transport, Data Link & Physical Layers Rick Ales 4/21/2003 Common Industrial Protocol Device Profiles & Electronic Data Sheets Application Object Library Messaging Routing & Connection Management DeviceNet ControlNet EtherNet/IP Device Level Control Level Information Level © Swagelok Company, 2002 Intrinsically Safe DeviceNet • Class 1 Zone 0 rating of EEx ia IIC T4 • DeviceNet Master and the single network power source is located in Class 1 Zone 2 area. • Main trunk line maximum distance 100 ft. • Maximum power consumption per node is 0.25W • Maximum 10 nodes per trunk line. Technically feasible!! Rick Ales 4/21/2003 © Swagelok Company, 2002 NeSSI DeviceNet Structure Common Device Profiles User Layer Automotive Device Profiles Semiconductor Device Profiles Analytical Inst. Device Profiles Generic Device Profiles Application Object Library CIP Application Layer Data Link & Transport Layer Physical Layer Messaging Routing & Connection Management Device Net (CAN Bus) DeviceNet Physical Layer Div 2Div 2Div 1 Device Level Rick Ales 4/21/2003 ControlNet DLL Transport Encapsulation UDP TCP Future IP ControlNet Physical Layer 802.x EtherNet Physical Layer Control Level Information Level Future Firewire, USB Bluetooth, ATM © Swagelok Company, 2002 Open DeviceNet Vendor Association ODVA is an international association comprised of members from the world's leading automation companies. Rick Ales 4/21/2003 © Swagelok Company, 2002 ODVA’s Role • Owns and manages the DeviceNet Specification. • Manages the development of CIP network technologies. • Assists manufacturers and users of CIP networks through tools, training and marketing activities. • Manages testing labs to verify conformance of vendors' products to the DeviceNet Specifications. Rick Ales 4/21/2003 © Swagelok Company, 2002 ODVA Member Functions Board Of Directors Technical Review Board (TRB) CIP Common Protocol System Architecture SIG CIP Common Marketing SIG Physical Layer SIG Conformance SIG Analytical Instrumentation SIG Enabler SIG (future) Semiconductor SIG System SIG Automotive SIG CIP Common Device Profile SIGs System JSIG Enabler JSIG Physical Layer JSIG Conformance JSIG ©2001 Open DeviceNet Vendor Association Rick Ales 4/21/2003 © Swagelok Company, 2002 ODVA Staff • • • • • Executive Director Staff Technologist Conformance Test Service Providers Member and Customer Service Operations Management Rick Ales 4/21/2003 © Swagelok Company, 2002 DeviceNet IS Initiative • Extend the user layer definitions to include analytical instrumentation device definitions and additional EDS formats. • Extend the conformance testing to include support for analytical applications. • Extend the physical layer definition to include the intrinsically safe option. • Obtain agency approval of DeviceNet IS. Rick Ales 4/21/2003 © Swagelok Company, 2002 Resource Requirements • Quorum of Analytical Instrumentation vendors to form a DeviceNet SIG and create device profiles & conformance tests. ($5K/yr ODVA dues.) – Analytical Instrument SIG might be supplemented by a User’s Advisory Board. (Associate membership) • Engineering resource for physical layer development. • Technical resource to obtain agency approval. Development, testing and approval project costs: $500K to $750K. Rick Ales 4/21/2003 © Swagelok Company, 2002 What’s Next? • Reassess the need for intrinsically safe network. • Convene a group of Key NeSSI stake holders to meet with ODVA directors to create a DeviceNet IS initiative project plan and identify resources and funding sources. • ODVA goal: announce the DeviceNet IS initiative at ISA 2003. Rick Ales 4/21/2003 © Swagelok Company, 2002