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Published byKathlyn Blake Modified over 9 years ago
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OPC DA Tunnelling Presenters: Colin Winchester, VP Operations Win Worrall, Application Engineer OPC DA Tunnelling PC to PC without DCOM Encryption between systems Across Firewall though single port
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OPC DA Tunnelling Agenda OPC Tunnelling Overview of the OPC Data Hub Live Demonstration Additional Application Examples Questions & Answers
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OPC Tunnelling What is Tunnelling? Moving OPC Data via simple TCP/IP port connection Eliminating DCOM and Expanding Data Transport Choices Computer #2Computer #1
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How Does OPC DA communicate between PC’s An OPC Client connects to an OPC Server through COM An OPC Client connecting to an OPC Server on a different machine connects through DCOM and must be authenticated. PC – 1 OPC Client COM run-time Security Provider OPC Client PC – 2 OPC Server COM run-time Security Provider OPC Server I want to connect to you Tell me your login name and password! My user name is “fred” and password is “*****” Let me check my Access Control List…. Yes, you are on my list… I will grant you access!
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OPC Tunnelling Why Tunnel- General? No DCOM! No Remote Procedure Calls (RPC) Remove Firewall Issues Network Interruptions – DCOM timeouts Computer #2Computer #1
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OPC DataHub Functionality Overview http://www.softwaretoolbox.com/opcdatahub System Monitoring OPC Tunnelling
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OPC Tunnelling Why Tunnel with DataHub? No DCOM! Or RPC – Easy to configure Remove Firewall Issues – single port Network Interruptions – more then DCOM Low-bandwidth or Reduce Network Traffic Improve System Performance & Reliability Increase Data security (passwords & SSL) Connecting to Non-Windows Systems Connect between any NT or later Windows OS
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Aggregation & Tunneling Additional Application Examples Multiple OPC Servers & Clients Each Client makes it’s own connection to each OPC Server High network utilization, negative impact on control network With Aggregation – Efficient Data Flow OPC Clients OPC Servers & OPC DataHub Without Aggregation – a maze of connections and redundant data flow! OPC Clients OPC Servers & OPC DataHub
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Aggregation & Tunneling Additional Application Examples Tunneling from Single OPC Server to Multiple Clients No DCOM headaches Firewall Friendly OPC Server OPC Client OPC DataHub
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Aggregation & Tunneling Additional Application Examples Tunneling Multiple OPC Servers to Single Client No DCOM headaches Firewall Friendly OPC Client OPC Servers OPC DataHub
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OPC Tunnelling Why Tunnel with DataHub? OPC DataHub tunnels DATA Any data source – OPC DA, DDE, ODBC Any data that DataHub can read Clients connected to OPC DataHub always get an answer Multiple clients on same PC, still one remote connection to remote OPC sources, managed by OPC DataHub. Other Tunnellers Tunnel commands at the OPC protocol level and can only tunnel OPC Data! Make connected clients wait on network timeouts Multiple clients on same PC talking to remote OPC server = multiple connections
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Other Approaches VPN Does not solve DCOM, Network stability, bandwidth and crossing domains OPC XML/DA Not secure, more over head, not for high speed, limited products, OPC UA OPC UA Requires all products to support it DataHub will add this
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3 Steps to Tunnelling with OPC DataHub Step 1: Connect Master to OPC Server Step 2: Connect Master to Slave Step 3: Connect OPC Client to Slave
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OPC Aggregation &Tunnelling Live Demonstration Win’s PCColin’s PC
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Aggregation & Tunneling Additional Application Examples Aggregating & Tunneling to MES/ERP Systems Aggregation Consolidates Plant Floor Data Tunneling gets it to the front office ODBC, API’s, DDE, Scripting, TCP/IP Available to tie in to MES/ERP
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Aggregation & Tunneling Additional Application Examples Aggregating & Tunneling OPC, Linux, ODBC and Excel! Pull data from OPC Server Locally Tunneled data to and from remote Linux Server – or any OS ODBC Database connections to Database Server All data pulled together in DataHub, charted in Excel with drag+drop OPC Server Database Server TCP/IP Tunnel
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Aggregation & Tunneling Additional Application Examples Tunneling to Bring HMI/SCADA Data Where You Need It Aggregate data when needed Tunneling to get the data where you need it Web Interface Serves the data where & how you want it ODBC, API’s, DDE, Scripting, TCP/IP to do what you want! DataHub InTouch HMI TOP Server InTouch to OPC Driver Standard TCP/IP Single Port Connections DataHub GE Proficy iFix DataHub RSView DataHub Front Office Factory Floor
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What Tools are Needed? For all usage scenarios No tag count limits No limits on # of clients, # of servers used with a single DataHub Aggregation on a Single PC – 1 DataHub License - $995 Aggregation + Tunnelling Scenario – 2 DataHub licenses (one per PC) - $1990 Demo site will pop-up after this presentation: http://www.softwaretoolbox.com/opcdatahub/html/free_demo.shtml
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Contact Information & Other Learning Opportunities Questions later? cwinchester@softwaretoolbox.com wworrall@softwaretoolbox.com 888-665-3678 x 1327 or 704-849-2773 x1327 www.softwaretoolbox.com/opcdatahub Other learning opportunities www.softwaretoolbox.com/opcdatahub and click on Videos/Training Visit www.softwaretoolbox.com/webinars
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