Hirschmann RS20 User Manual page 47

Multiple Rings
Note: The following devices support the Sub-Ring Manager function:
– RSR20/RSR30
– MACH 1000
– MACH 1040
– MACH 4000
– PowerMICE
The SRM-capable devices support up to 4 SRM instances (MACH 1040 up
to 8) and can thus be the Sub-Ring manager for up to 4 Sub-Rings at the
same time (MACH 1040 for up to 8).
In a Sub-Ring, you can integrate as participants the devices that support
MRP - the Sub-Ring Manager function is not required.
Each Sub Ring may consist of up to 200 participants. The SRMs themselves
and the switches placed in the Base Ring between the SRMs do not count.
here.
Setting up Sub-Rings has the following advantages:
 Through the coupling process, you include the new network segment in
the redundancy concept.

You can easily integrate new company areas into existing networks.
 You easily map the organizational structure of a company in the network
topology.

As an MRP-Ring, the switching times of the Sub-Ring in redundancy
cases are typically < 100 ms.
UM RedundConfig L2P
Release 8.0 05/2013
4.1 Sub-Ring
47