Other Dbus Functionality; Figure 29: Monitor Sba Connection Status; Figure 30: Switch Bsm Logic - GE PACSystems RX3i Application Manual

Chapter 5. PLC Hardware Configuration (Primary PLC)

Other DBUS Functionality

Alarms Posted in PLC Fault Table
LOD 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 device
successfully logs onto either Bus A or Bus B. The time-stamped message appears in the PLC Fault
Table.
Real-time View of Genius Devices on Dual Busses
Device Status Bits
Switch Devices on Busses
SW_BSM
NOTE: The highlighted elements may be used to control and execute the Switch BSM function.
28
Zoom into the block to observe the current connection status for all configured
Genius devices on the dual bus pair. Four rungs display the device status on Bus A
and Bus B. The index inside the brackets correspond to the Genius Serial Bus
Address. Figure 29 demonstrates the logic for monitoring SBA 0 through 7, so it
needs to be expanded to cover the entire bus.

Figure 29: Monitor SBA Connection Status

Zoom into the block to display the Switch BSM (SW_BSM) function block. This
function block allows the user to switch a specified Genius device to either Bus A or
to Bus B.

Figure 30: Switch BSM Logic

PACSystems* RX3i Genius Dual Bus Application Guide GFK-2928