Siemens S7-300 - Media Redundancy; Media Redundancy in Ring Topologies

Configuring the Ethernet CP with STEP 7
3.5 Media redundancy
Configuring and commissioning S7 CPs for Industrial Ethernet
70 Configuration Manual, 09/2013, C79000-G8976-C182-13
● HTTPS is enabled on the CP
– With cURL version up to V7.23:
curl -k -u <username>:<password> --url https://172.16.1.180/ACL
--data-urlencode @AccessList.txt
– Do not use cURL version V7.24.
– With cURL version as of V7.25:
curl -k --ssl-allow-beast -u <username>:<password> --url
https://172.16.1.180/ACL --data-urlencode @AccessList.txt
3.5
Media redundancy
There are various options available to increase the network availability of an Industrial
Ethernet network with optical or electrical linear bus topologies:
● Mesh networks
● Parallel connection of transmission paths
● Closing a linear bus topology to form a ring topology
3.5.1
Media redundancy in ring topologies
Structure of a ring topology
Nodes in a ring topology can be external switches and/or the integrated switches of
communications modules.
To set up a ring topology with media redundancy, you bring together the two free ends of a
linear bus topology in one device. Closing the linear bus topology to form a ring is achieved
with two ports (ring ports) of a device in the ring. This device is the redundancy manager. All
other devices in the ring are redundancy clients.
Figure 3-1 Devices in a ring topology with media redundancy