Siemens SIMATIC S7-1500 System Manual page 230

Connecting HMI devices over Industrial Ethernet and the PROFINET ring based on the example of
CPU 1518HF-4 PN/CPU 1517H-3 PN/CPU 1515R-2 PN
The figure below is an example of how you can connect the CPU 1518HF-4 PN to an HMI
device over Industrial Ethernet and the PROFINET ring. Connect the HMI devices in the same
way for the CPU 1517H-3 PN/CPU 1515R-2 PN.
Figure 6-63
The CPUs 1517H-3 PN/CPU 1515R-2 PN have a PROFINET IO interface with two ports (X1 P1R,
X1 P2R) and a PROFINET interface with one port (X2 P1). The CPU 1518HF-4 PN has an
additional PROFINET interface with one port (X3 P1).
To connect an HMI device to the CPUs over Industrial Ethernet, you use the X2/X3 PROFINET
interfaces of the CPU. PROFINET interface X2/X3 supports PROFINET basic functionality. The
interface, for example, is suitable for communication with an HMI device or configuration
and programming software (Engineering Station).
Note
A PROFINET device (such as an HMI device) can only communicate with the redundant
system over the system IP address if it has been connected to both R/H-CPUs. Always connect
the PROFINET device to the same interfaces, X1 or X2/X3, on both R/H-CPUs. Do not mix
interfaces X1 and X2/X3: If you mix interfaces X1 and X2/X3, the HMI connection is no longer
redundant.
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
Configuration example CPU 1518HF-4 PN: Connecting HMI devices over Industrial
Ethernet and the PROFINET ring
Application planning
6.7 Using HMI devices
229