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Wireless for Automation Hunter Harrington PROFINET Consulting Engineer, PIC

PI PROFIBUS

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Wireless for Automation Hunter Harrington PROFINET Consulting Engineer, PIC

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    1. Wireless for Automation Hunter Harrington PROFINET Consulting Engineer, PIC / PTO

    2. PI PROFIBUS & PROFINET International The world’s oldest fieldbus organization Founded 1989 The world’s largest fieldbus organization 1400+ members The world’s leading fieldbus organization More than 18,000,000 nodes installed (3.5M in’06) More than 2,500 devices types The world’s most active fieldbus organization More than 500 specialists in over 50 Working Groups The world’s only global fieldbus organization 25 regional associations (PTO is one) 32 competence centers (PIC is one) 8 test labs (PIC is one) The world’s most experienced fieldbus organization Discrete (from the beginning) Process (over 800,000 nodes) Motion control (since 2001) Machine and Process Safety (200,000 nodes in 20,000 installations, 2,000 in process) Vertical and Horizontal Integration (only organization with specs for these)

    3. PTO Founded in 1994 as PROFIBUS Trade Organization A non-profit, member-supported organization PTO’s two main goals Educate manufacturers on the benefits of fieldbuses in general and PROFIBUS and PROFINET in particular Help device makers develop and market their products The PTO is the non-profit, member-supported automation organization for communication solutions. It is dedicated to supporting the discrete and process industries in achieving beneficial results using fieldbuses, specifically PROFIBUS and PROFINET. The PTO also assists device manufacturers in the development and marketing of PROFIBUS and PROFINET products. The PTO is the non-profit, member-supported automation organization for communication solutions. It is dedicated to supporting the discrete and process industries in achieving beneficial results using fieldbuses, specifically PROFIBUS and PROFINET. The PTO also assists device manufacturers in the development and marketing of PROFIBUS and PROFINET products.

    4. PIC PROFI Interface Center For users Network support by phone or in-person Certified training classes For device manufacturers Transfer PROFINET know-how to your company Develop a PROFINET roadmap for your products Answer your questions about the PROFINET software and how to implement into your products Certify PROFINET devices

    6. Wireless Local Area Network (WLAN) – IEEE 802.11 We already seeing the utilization of wireless in the office world in conjunction with the standard wired LAN. Now we are starting to see wireless used in industrial applications where cabling is an obvious issue. We already seeing the utilization of wireless in the office world in conjunction with the standard wired LAN. Now we are starting to see wireless used in industrial applications where cabling is an obvious issue.

    7. Open and Flexible Standards: What standard should I use?

    8. 802.11 compatible infrastructure products

    9. Things you need to know about Wireless Wireless LAN is a shared medium Like a Hub The more clients you connect to one access point the lower the throughput / bandwidth Due to CSMA/CA (Collision Avoidance) only ~ 50% of bandwidth is usable Only one device can access the network at a time (per non overlapping channel) In the IEEE 802.11 wireless LANs, multicasting is specified as a simple broadcasting mechanism at a fixed rate with no ACK. Unlike unicasting, there is no binary exponential backoff process in multicast packets, which may allow the multicast traffic to dominate the wireless link. Accordingly, when reliable unicast flows and unreliable multicast flows coexist, multicast flows will get more channel access chances than unicast flows with binary exponential backoff. This unbalance or unfairness causes the degradation of the aggregate throughput of unicast flows. (source: http://mmlab.snu.ac.kr/publications/docs/mcast-ccnc2006_fomula.pdf) In the IEEE 802.11 wireless LANs, multicasting is specified as a simple broadcasting mechanism at a fixed rate with no ACK. Unlike unicasting, there is no binary exponential backoff process in multicast packets, which may allow the multicast traffic to dominate the wireless link. Accordingly, when reliable unicast flows and unreliable multicast flows coexist, multicast flows will get more channel access chances than unicast flows with binary exponential backoff. This unbalance or unfairness causes the degradation of the aggregate throughput of unicast flows. (source: http://mmlab.snu.ac.kr/publications/docs/mcast-ccnc2006_fomula.pdf)

    10. Wireless Design Considerations Implementation into automation applications Signal strength and distortion Real time and deterministic control Security Topology and coverage requirements

    11. Requirements for Industrial Wireless LAN

    12. PROFINET supports wireless communication Wireless Ethernet according to IEEE 802.11 PROFINET is fully compliant with “Office Wireless LAN (WLan)” Available features for Industrial Wireless applications include: Rapid roaming R-Coax Bandwidth Reservation Antenna Diversity Use Cases Mobile diagnostics, monitoring, and operation Moving machines, monorail systems

    13. Which Wireless features to use for Industrial Applications?

    14. Bandwidth Reservation

    15. Industrial features for 802.11 Infrastructure products

    16. Industrial features for 802.11 Infrastructure products

    17. Real time and deterministic control through rapid roaming

    18. Industrial features for 802.11 Infrastructure products

    19. PROFINET Wireless WG Guidelines – Focus is on Application of Wireless Wireless real-time I/O with roaming 5 wireless I/O devices 16ms update time (cyclic) Multiple access points Roaming within update time Typical use case: monorail suspension track system

    20. PROFINET Wireless WG Guidelines– Standard IEEE 802.11 for these requirements Wireless real-time I/O 4 wireless I/O devices 32ms update time (cyclic) Devices move in radio field of one access point Typical use case: E.g. Rotating machine

    21. Example: Mobile Assembly Station VW (automobile) The notes should contain more information on the application described. The slides only contain keywords. The person presenting the slides must embellish these with the help of the notes. Note: What questions could the listeners ask? The notes should contain possible answers.The notes should contain more information on the application described. The slides only contain keywords. The person presenting the slides must embellish these with the help of the notes. Note: What questions could the listeners ask? The notes should contain possible answers.

    22. Example: Wireless and SAFETY CAMotion: Robot gantry application

    23. Example: Wireless SCADA and VOIP Mount Olive Pickle in North Carolina, USA

    24. Comprehensive Wireless architecture: Machine Control and I/O This shows the ultimate picture. Here we have a wired backbone with Access points for a wireless cell. We then have two dual access points with one interface being used to extend the backbone via wireless and the other connection to create a local wireless cell. Then to show the rest of the picture we have two client modules allowing remote connection via the wireless cell by a PLC in one case and an I/O rack in the other. We then also show a PC accessing using a wireless card. This shows the ultimate picture. Here we have a wired backbone with Access points for a wireless cell. We then have two dual access points with one interface being used to extend the backbone via wireless and the other connection to create a local wireless cell. Then to show the rest of the picture we have two client modules allowing remote connection via the wireless cell by a PLC in one case and an I/O rack in the other. We then also show a PC accessing using a wireless card.

    25. Comprehensive Wireless architecture: VOIP This slide shows how a Scalance W Access Point can be used in conjunction with a Siemens Com Wireless Controller in an VOIP (Voice Over IP) application for the Office as well as on Plant FloorThis slide shows how a Scalance W Access Point can be used in conjunction with a Siemens Com Wireless Controller in an VOIP (Voice Over IP) application for the Office as well as on Plant Floor

    26. Resources beyond today: www.us.profinet.com

    27. Questions?

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