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WinCC OA Ultra Thin Client Overview

Learn about the Ultra Thin Client architecture, how it works with SVG and Javascript, its limitations, workflow, positives, and questions for future development. Try it now!

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WinCC OA Ultra Thin Client Overview

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  1. WinCC OA Ultra Thin Client Daniel.Rodrigues@cern.ch

  2. Ultra Thin Client Overview • For delivery in WinCC OA 3.11 • Previewing in 3.10 • Fully Web Based • Uses HTTP + SVG + Javascript • Requires SVG support… • Converted directly from xml Panels • with limitations! WinCC OA UltraThinClient, FWWG, June 2011

  3. What’s SVG • SVG: Scalable Vector Graphics • Specification developed by W3C • www.w3.org/Graphics/SVG • It is “A Markup Language for describing two-dimensional graphics applications and images and a set of related graphic script interfaces” • Native support on most platforms • IE8 and older require a plugin… • But available on IE9 WinCC OA UltraThinClient, FWWG, June 2011

  4. Ultra Thin Client Architecture Basic building blocks: • CtrlXmlToSvg.dll • Converts XML based panels into SVG files • UltraThinClientServer.ctl • The http server • Loads CtrlXmlToSVG and handles http calls • data\http\libs\*.js files • Object specific javascript code • data\http\panels\*.svg • The panels, in SVG format WinCC OA UltraThinClient, FWWG, June 2011

  5. Ultra Thin Client Architecture Event Manager Data Manager iii • Initial process • HTTP request (panel.xml) • CtrlManager creates panel.svg • Ctrl Manager sends panel.svg back to browser • dpSet • HTTP request (dp,value) • CtrlManager does a PVSS dpSet(dp, value) • dpConnect • HTTP request (dp,clientId) • CtrlManager does a dpConnect to the eventManager and adds clientId to list • Sucessive HTTP requests (dp, clientid) CtrlManager eventually receives new value • Browser receives value change Ctrl Manager UltraThinClientServer.ctl 2 b CtrlXmlToSVG.dll ii 3 iv 1 iii a i WinCC OA UltraThinClient, FWWG, June 2011

  6. Workflow • Create a panel and save in xml format • Respecting the limitations and conventions • Start the UltraThinClientServer.ctl • Configurable • Use your SVG enabled browser to see the panels • Try it now! http://pcen33050/SVG?panel=FwwgPresentation.xml WinCC OA UltraThinClient, FWWG, June 2011

  7. Example WinCC OA UltraThinClient, FWWG, June 2011

  8. Limitations • It is not a full fledged UI Manager! • Basic communication with Server • dpSet/ dpConnect / dpToggle/ dpExists/ dpTypeName/ dpGetDescription • Limited number of Objects available • TextEdit (no multiline) • RadioCheckbox • PushButton (Toggle not working) • Basic Trend, Basic Alarm • Limited actions per object • Clicked, Command, Initialize • No double click, mouse*, keyboard*, drag* … • Global ScopeLib but no “#uses” • No redirection when using dot notation “.”. Ex: MyText1.text • Always required to use “getValue/setValue” Ex: getValue(“MyText1”, “text”) • A number of misconversions and bugs • Objects in reference panels • Toggle, Crash on many popups… WinCC OA UltraThinClient, FWWG, June 2011

  9. Positives • It is a real Web Based solution • Unlike WebPlugin • It integrates quite well with the Gedi • A few objects are already automatically converted • CTRL Scripts are translated to javascript • “Hackable” • All SVG and javascript libraries could be customized. • Scalable • One unique dpConnect call on many connected clients! WinCC OA UltraThinClient, FWWG, June 2011

  10. Questions to you • Portable platforms: • Would you envision using Tablets ? • Additional development effort • Does it make sense to develop panels exclusive to the Web? • What objects are a must have? • MultilineEdit / better Alarm Screen / Toggle buttons WinCC OA UltraThinClient, FWWG, June 2011

  11. Thank you for your attention. • Questions? WinCC OA UltraThinClient, FWWG, June 2011

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