Hirschmann RS20 User Manual page 85

Ring/Network Coupling
 In the "Redundancy Mode" frame, select:
– "Redundant Ring/Network Coupling"
or
– "Extended Redundancy".
Figure 40: Two-Switch coupling with control line: Selecting the redundancy
mode
With the "Redundant Ring/Network Coupling" setting, either the
main line or the redundant line is active. The lines are never both active
at the same time.
With the "Extended Redundancy" setting, the main line and the
redundant line are simultaneously active if the connection line between
the devices in the connected (i.e. remote) network fails
During the reconfiguration period, package duplications may occur.
Therefore, only select this setting if your application detects package
duplications.
Figure 41: Extended redundancy
UM RedundConfig L2P
Release 8.0 05/2013
5.2 Preparing a Ring/Network
(see figure
Coupling
27).
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