05/07/17 Presented by a.benoit OPC DA AND UA in Labview 05/07/17 Presented by a.benoit

WHAT IS OPC ? Originaly OPC stood for “OLE” ( object linking and embedding) for process control Today acronym OPC stands for Open Platform communications. FOR MORE INFO PLEASE GO TO OPC FUNDATION WEB PAGE : https://opcfoundation.org

CLASSIC OPC The OPC Classic specifications are based on Microsoft Windows technology using the COM/DCOM (Distributed Component Object Model) for the exchange of data between software components. The specifications provide separate definitions for accessing process data, alarms and historical data. Several forms : - OPC Data Access ( OPC DA ) - OPC Alarms & Events ( OPC AE ) - OPC Historical Data Access ( OPC HDA )

OPC UA As technology evolved, so did the OPC standards. In 2008 the OPC foundation released a new unified standard : OPC Unified Architecture ( OPC UA ) A platform independent service-oriented architecture that integrates all the functionality of the existing OPC Classic specifications, and is backward compatible with OPC Classic

Integration of OPC DA in Labview What to do first : Verify or set up the dcom settings : http://www.sytech.com/download/OPC_and_DCOM.pdf Create a Process & client from the project or from the distributed system manager ( or programmatically ) Read ( poling) /write your data using : network shared variables Datasocket vis Shared variable vis Read your data in subscription mode.

Integration of OPC DA in Labview What to do first : Build up your client and or your server in labview using the vis from the dsc module. read from client side in pulling mode or subscription mode. You can also write from client side of course.

DEMO! Demo content will be available soon in the meeting page.