GE PACSystems RX3i Application Manual

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Chapter 5. PLC Hardware Configuration (Primary PLC)28 PACSystems* RX3i Genius Dual Bus Application Guide GFK-2928Other DBUS FunctionalityAlarms Posted in PLC Fault TableLOD An internal function that posts Loss-of-Device if the device is not attached to either Bus A or Bus B,and the default timer has expired. The time-stamped message appears in the PLC Fault Table.AOD If the device has been offline, this internal function posts Addition-of-Device if the Genius devicesuccessfully logs onto either Bus A or Bus B. The time-stamped message appears in the PLC FaultTable.Real-time View of Genius Devices on Dual BussesDevice Status Bits Zoom into the block to observe the current connection status for all configuredGenius devices on the dual bus pair. Four rungs display the device status on Bus Aand Bus B. The index inside the brackets correspond to the Genius Serial BusAddress. Figure 29 demonstrates the logic for monitoring SBA 0 through 7, so itneeds to be expanded to cover the entire bus.Figure 29: Monitor SBA Connection StatusSwitch Devices on BussesSW_BSM Zoom into the block to display the Switch BSM (SW_BSM) function block. Thisfunction block allows the user to switch a specified Genius device to either Bus A orto Bus B.Figure 30: Switch BSM LogicNOTE: The highlighted elements may be used to control and execute the Switch BSM function.