Integration of INTERBUS Into Profinet IO

Modular IntegrationFigure 3 provides an overview of modular integration. To simplify the view, the submodulelevel has been omitted because every module contains only one submodule.In a modular integration concept, slot 1 is reserved for the INTERBUSmaster, while the slaves are assigned to slots 2 and aboveSlot 1 of the Profinet IO device model is reserved for the INTERBUS master. The cyclicprocess data channel, which is used for status messages and control registers, can be usedto request the status of the INTERBUS system and to execute a special action such asconnecting and disconnecting devices. All events, which do not affect a specific slot, such asgeneral parameterization errors, are mapped to the channel diagnostics of slot 1. Everydiagnostic event is sent to the control system using a corresponding diagnostic alarm.All INTERBUS slaves connected to the master use slots 2 and above. The order of the slotsmust correspond to the structure of the INTERBUS system. Empty slots are not permitted.The cyclic process data of a slot is assigned directly to the input and output data of theindividual INTERBUS slaves, while the Profinet IO parameters are used for settingdevice-specific data (e.g., ID code or process data length) and for mapping device-specificPCP parameters.A key feature of the INTERBUS system is its excellent diagnostic properties. All diagnosticmessages are therefore available as Profinet IO channel diagnostics and sent to the controlsystem using diagnostic alarms. The control system then displays the diagnostic event inplain text.Configuration AspectsProfinet IO devices are described in GSDML (Generic Station Description Markup Language),which is a further development of GSD (Generic Station Description) used in the Profibussystem. The file must include the slots of an IO device as well as all the modules, which canbe integrated in the slots. Since the slaves of the INTERBUS system are mapped to themodules of the IO device during fieldbus integration, the GSDML file for the proxy should also

the relevant application. Key features of the concept include minimal runtime losses, the useof standard software for configuration, and the direct configuration of the INTERBUS systemin the control system. In addition, the comprehensive diagnostic properties of the fieldbussystem can be integrated easily into the world of Profinet IO.Download Brochure "Profinet Basics"