Siemens SIMATIC S7-1500 Manual page 31

PROFINET interfaces X2 and X3 with 1 port (X2 P1 X3 P1)
The assignment corresponds to the Ethernet standard for an RJ45 connector.
• Autocrossing is always active on X2. This means the RJ45 socket is allocated either as data
terminal equipment (MDI) or a switch (MDI-X).
• Autocrossing is always active on X3. This means the RJ45 socket is allocated either as data
terminal equipment (MDI) or a switch (MDI-X).
Figure 4-1 Interfaces X2 and X3
NOTE
PROFINET interface X3 with a transmission rate of 1000 Mbps
The PROFINET interface X3 supports a maximum transmission rate of 1000 Mbps.
Requirements:
• The CPU 1518T‑4 PN/DP has a firmware version of V1.7 or higher
• Devices on the PROFINET segment must support the 1000 Mbps transmission rate.
• The network infrastructure (network cables and outlets) must be category CAT 5e or
better.
• The "Transmission rate" parameter in the properties of the port (X3) must be set as follows
in STEP 7:
– The "Autonegotiation" check box is selected
– "Automatic" is selected in the drop-down list
CPU 1518T-4 PN/DP (6ES7518-4TP00-0AB0)
Equipment Manual, 11/2022, A5E50479758-AB
Connecting
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