System Redundancy - Pepperl+Fuchs HD2-GTR-4PA Manual

Basic Principles
•
Figure 8.2: Flying Redundancy combined with Media Redundancy
This structure represents a common "Flying Redundancy" concept. It
demonstrates that the Primary Slave and Backup Slave do not need to
be connected to the same physical bus.
8.1.3

System Redundancy

Under the concept of "System Redundancy" there are two Masters,
each one of which performs its own PROFIBUS cycle on two different
lines. The redundant Slave instances are connected to each other with
the corresponding cables:
•
Figure 8.3: System Redundancy
The main disadvantage of this concept is that non-redundant Slaves
can only be used if Y-Links are also used. System Redundancy is
usually found in combination with the Siemens S7.
The Pepperl+Fuchs HD2-GTR-4PA Gateway does not support "System
Redundancy".
Subject to reasonable modifications due to technical advances.
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