Redundancy; Cpu/Bus Controller Redundancy - Emerson PACSystems VersaMax User Manual

PACSystems VersaMax Genius Network Interface User Manual
GFK-1535D
Section 6:
Most systems use only one host controller and one Genius Bus Controller
to control the I/O attached to a particular Genius bus. For critical
applications, a variety of Genius Redundancy configurations are available
to protect against various types of failure modes. Genius Redundancy is
described in detail in the Genius documentation. This section summarizes
how the Genius NIU can be used in Genius Redundancy configurations.

CPU/Bus Controller Redundancy

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Using the Genius NIU in a Genius Bus Redundancy System
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6.1 CPU/Bus Controller Redundancy
With CPU / Bus Controller redundancy, two or three Genius Bus
Controllers can collect the inputs from and control the outputs of a
common set of devices attached to the same bus. The Bus Controllers
receive inputs and fault reports from devices on the bus that have been
configured to use the appropriate "CPU Redundancy" mode. The Bus
Controllers must use serial bus addresses 31, 30, and 29.
Figure 67: CPU/Bus Controller Redundancy
VersaMax I/O Stations can be used on a bus controlled by redundant
CPUs/Bus Controllers.

Redundancy

Redundancy
Section 6
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