Rockwell Automation AADvance Controller Solutions Handbook - Manual (Page 78)

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4-6 Document: 553631
(ICSTT-RM447J_EN_P) Issue: 09:
Solutions Handbook (AADvance Controller)
Typical Network Applications
A typical distributed AADvance system uses two networks:
 An information network, which provides connectivity to the BPCS (basic process
control system) and to OPC devices
 A dedicated safety network, which handles data shared between the AADvance
controllers
The engineering workstation may connect to the safety network (as illustrated), to the
information network or to both networks.
As drawn, the OPC portal server collects data from the controllers and displays it on
the HMIs and, conversely, delivers commands from the HMIs to the controllers. The
information network carries real time data (Modbus TCP) from the BPCS to the
controllers.
Specifying a Safety Network
Once a system uses distributed controllers with shared data, the topology of the safety
network must provide some robustness. To do this, make sure the network has no
single point of failure, and refer to the AAdvance Safety Manual (Document: 553630).