Siemens SIMATIC S7-1500 Equipment Manual page 32

Wiring
The MAC addresses of the PROFINET ports are needed for the LLDP protocol, for example for
the neighborhood discovery function.
The number range of the MAC addresses is sequential. The first and last MAC addresses are
lasered on the rating plate on the right side of each CPU 1517T‑3 PN/DP.
The table below shows how the MAC addresses are assigned.
Table 4-3 Assignment of the MAC addresses
Assignment
MAC address 1 PROFINET interface X1
(visible in STEP 7 for accessible devices)
MAC address 2 Port X1 P1R (required for LLDP, for example)
MAC address 3 Port X1 P2R (required for LLDP, for example)
MAC address 4 PROFINET interface X2
(visible in STEP 7 for accessible devices)
MAC address 5 Port X2 P1 (required for LLDP, for example)
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Labeling
• Front, lasered
• Right side, lasered
(start of number range)
• Front and right side, not lasered
• Front and right side, not lasered
• Front, lasered
• Right side, not lasered
• Front, not lasered
• Right side, lasered
(start of number range)
CPU 1517T-3 PN/DP (6ES7517-3TP00-0AB0)
Equipment Manual, 11/2022, A5E36285525-AD