Dual Bus Function Block; Input; Output; Figure 28: Dual Bus Function Block - GE PACSystems RX3i Application Manual

5.6

Dual Bus Function Block

The main function of the Dual Bus (DBUS) function block is to remap the discrete and analog inputs from the
backup bus to the main bus by monitoring the status bits of the Genius devices that are installed on the dual
bus pair.
These are the external connections:

Input

DB This receives the Genius bus parameters (via a variable of "user defined type" G_Bus). Note that the
parameters are configured using the function blocks derived from either INIT_GB00 or INIT_GBnn.

Output

PNCST Provides a copy of the status information for the associated PROFINET Controller module.
A_PSD Provides a copy of the Genius Communication Gateway status information from Bus A.
B_PSD Provides a copy of the Genius Communication Gateway status information from Bus B.
DSB_A Provides a copy of the device connection status for all Configured Genius devices on Bus A.
DSB_B Provides a copy of the device connection status for all Configured Genius devices on Bus B.
CSB: Provides device connection status for all configured Genius devices on the dual bus pair.
GFK-2928
Chapter 5. PLC Hardware Configuration (Primary PLC)

Figure 28: Dual Bus Function Block

December 2017 27