Presentation on theme: "Building Web-Based HMI’s in Visual Studio.NET Introduction to OPC Systems.NET Win Worrall Applications/Development Engineer"— Presentation transcript:
Building Web-Based HMI’s in Visual Studio.NET Introduction to OPC Systems.NET Win Worrall Applications/Development Engineer Direct Line: +1 (704)
Agenda Talk about Web-Applications, why they matter! Briefly discuss the merits of a web-based application Introduce OPC Systems.NET Live Demo – Creating HMI Screens for the Browser Summary Questions & Answers We’ll get here quickly!
Web-Applications matter! Accessible via Browser such as Internet Explorer and Firefox. iPhone, Smart Phone, Internet Tablets etc. Security already built-into the Web-Server. Single application to maintain and deploy. No software or components to deploy. Accessible via LAN & Internet Development is easier than ever! Why are we here? Why web-applications?
“Web Benefits” that matter! Firewall-friendly HTTP: No need to open firewall Ports No DCOM headaches Security built-in: Assign access-rights to users/groups for the entire site, or per-page Use SSL for secure connections insuring data-integrity and privacy Abundance of security tools available “Cluster” Server(s) and Application(s) for High Availability
Web Development Changed Code-less, no more learning “languages” AJAX delivers dynamic pages, no reload Winform/Webform development = same! Easy debugging with Visual Studio.NET “Streaming” OPC data is now Easy!
Web-App Capabilities Display data from OPC Servers Get user-input for writing to OPC Items Trending/Charting live OPC Data Alarm displays and acknowledgements
Web-HMI, does it make sense? (AJAX Polling) Simple screens with few graphics Data response can be slow Restrict access to users/groups Must be accessible Inside/outside LAN Desktop, Laptop, Phone etc. Large quantities of data on-screen. High-speed data (sub 1-second) High concurrent user # with above. Continuous process control / monitoring We have other solutions that meet these needs When it makes senseNot a good fit!
OPC Systems.NET Benefits OPC Systems.NET provides these benefits: Central “always-on” tag repository = faster performance Tag data can come from OPC DA and/or Databases Multi-Threaded for faster, and more Reliable operations Buffers data, eliminating data-loss for short outages as well as maximizing the performance of your web-link Modular, components available separately or as a suite Affordable, not as expensive as you might think OPC Self-Certified, for assurance in quality NO MORE DCOM HEADACHES
PLC DCS Other How it works… OPC Systems.NET Service (Tag Repository) AJAX Polling Data Source OPC Server Tag repository stores Data, and some history Data can come from OPC Servers OPC Connection is always ON eliminating connectivity overhead Browsers see OPC Data when page opens Async polling retrieves data to be shown in page, no refresh!
PLC DCS Other How it works… OPC Systems.NET Service (Tag Repository) AJAX Polling Data Source OPC Server Browser requests an “update” of the items/tags it needs. OPC Systems.NET Server responds with values that have changed: If value remains same, empty data-set returned If 1-value changed, that value is returned If the value changed multiple times, all updates sent
Tolerance Tag Repository individually “caches” data to each client If a client goes temporarily offline, it will “catch-up” on the next update. Applies to ALL OPC Systems.NET Clients (data logging, alarms, WinForms, WebForms etc.) OPC Systems.NET Service (Tag Repository) Client Application QueueQueue Local Client Application QueueQueue Network Client Application QueueQueue Internet
Live Demo Setup the Tag repository, creating tags coming from multiple OPC Servers Create a multi-page Web Site Display some real-time data User-entry form, for writing values to Tags Charting page Alarm display and acknowledgement page
Affordable Licenses start at $595 for Webforms License the entire system for just $1, No OPC Server Connection or Tag Counts No Client counts at the OPCSystems Service No Text File or Database Connection Counts Code-less development tools are Runtime-free Fully documented, lots of examples SmartClient Technology ready
Other Features Available Data Logging (text files and databases) Report generation Alarm logging and notification Windows Forms development tools Recipe management
Summary Convenience: Quickly and easily build & deploy HMIs Scalable Framework: allowing your system to grow Reliable: OPC Self-Certified, plus Buffering Alerting: Data Logging, Reporting, Alarming & Notifications Open: API provides interface for your apps to control Affordable: modular, buy what you need.
More Information Questions: Win Worrall: Tel: +1 (704) Technical Support: Tel: +1 (704) Web: … get through to an expert!