Siemens Simatic S7-1500R System Manual page 142

6. Assigning IO devices to the redundant system
To assign IO devices to the S7-1500R/H redundant system, connect every IO device to each
CPU.
To do so, proceed as follows:
1. Drag-and-drop a line between the PROFINET interface of IM 155-5 PN HF and
PROFINET interface X1 of the left-hand CPU.
2. Drag-and-drop a line between the PROFINET interface of IM 155-5 PN HF and
PROFINET interface X1 of the right-hand CPU.
3. Assign the second IO device, IM 155-6 PN HF, to the two CPUs in exactly the same way.
Result: The IO devices are connected to S7-1500R/H with system redundancy.
Figure 6-5 IO devices assigned in the network view with system redundancy
7. MRP role of the CPUs in the S7-1500R/H redundant system
As soon as you create an S7-1500R/H redundant system in STEP 7, STEP 7 automatically
assigns the MRP role "Manager (auto)" to the PROFINET interfaces X1 of both CPUs.
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
Configuration
6.2 Configuration procedure
141