GFK-2571A
Chapter 6 Redundant Media
6-5
6
Ring Topology with Multiple Controllers
The next illustration shows a more complex network. There is one RX3i CPU node with two PNC
modules, a second RX3i CPU node with one PNC module, and five IO-Devices, in this case,
VersaMax PNS modules.
All devices are on the same network ring. One PNC is configured as the Media Redundancy
Manager (MRM); the other PNCs and all PROFINET Scanners are configured as Media
Redundancy Clients (MRCs).
RX3i CPU Node with
two PROFINET
Controllers
IO-Device
IO-Device
IO-Device
IO-Device
IO-Device
RX3i CPU Node with
one PROFINET
Controller
IO LAN 1
IO LAN 1
IO LAN 1