Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019 85
AADvance System Architectures Chapter 4
Example Distributed Controller Systems
The following example shows a process protected by one distributed
AADvance system. It uses an 8000 Series Trusted controller to handle bulk I/
O, and four AADvance controllers for other parts of the plant.
Controllers 1 and 2 show two similar controllers which are almost the same
applied to the same, duplicated areas of plant. The duplication of plant
(represented by the two compressors K1 and K2) in this system allows
controllers 1 and 2 to be fail safe designs.
The parts of the plant managed by Controllers 3 and 5 are assumed (for the
sake of this illustration) to need safety instrumented systems certified to a
mixture of SIL 2 and SIL 3. Controller 3 exploits the flexibility of the
AADvance system to supply mixed SILs in one controller.
Controller 4 manages the fire and gas system in the plant. The example uses an
8000 Series Trusted controller here in a role which uses a large quantity of field
devices. The 8000 Series Trusted controller is fully integrated into the system
and shares the applications with the AADvance controllers.
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