Profibus System Integration PDF 4.03MB - Schneider Electric

SCADA system designIntroductionDuring SCADA application build time, Vijeo Citect objects must be defined, along withthe associated data and data type.The following recommendations are provided to facilitate design, readability and re-use:• Exchanges are done via DDT variables (Standard Derived Data).• Interchange file format XVM was chosen, to manage the DDT variables typewithout needing to install the Unity tool on the station.• OFS server (OPC Factory Server) makes it possible to use Unity structuredvariables in unlocated format.The application is based on Genie and Super Genie objects.The Super Genie object has an advantage in comparison to Popup. It is a libraryobject, and is not linked to the page or to an application like Popup. Super Geniesfrom an application library can be reused easily by a new Vijeo Citect project, usingthe “Link Project” function.53