ABB LD 800HSE, Руководство пользователя

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Redundancy Appendix C Technical Reference
112 3BDD011677-600 A
Redundancy
FOUNDATION fieldbus is also a distributed control architecture that provides
increased availability compared to centralized control architectures. But as a linking
device acts as gateway between H1 links and the HSE subnet it represents a
bottleneck concerning the availability of communication paths leading from HSE to
H1 and vice versa.
To improve the availability of the LD 800HSE, it is possible to combine two linking
devices which then form a redundant linking device, that behaves logically like one
device.
Redundancy Concept
A redundant linking device (also called “a redundant set of devices”) consists of
two physical linking devices that are connected to the same HSE subnet and to the
Figure 38. System Topology