Omron PROFINET IO CJ1W-PRM21 Operation Manual page 41

Setting up the PROFINET IO network
3-4-4 Network and Controller redundancy
Figure 3.12:
When combining the PROFINET MRP ring redundancy and the IO Controller
redundancy a control system with a high availability can be achieved. Single
points of failure should have no influence on the operation of the application.
A system with both PROFINET MRP ring redundancy and IO Controller
redundancy could be set up like the picture below.
Figure 3.13: Network and Controller redundancy
Switch
PROFINET IO Controller redundancy
MRP Manager
MRP Client
Section 3-4
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