Siemens SIMATIC ET 200SP Equipment Manual page 23

Assignment of the MAC addresses
The MAC address is a globally unique device identifier that is assigned to each PROFINET
device in the factory. Its 6 bytes are divided into 3 bytes for the manufacturer ID and 3 bytes
for the device ID (serial number). The front of the CPU 1512SP‑1 PN is lasered with the MAC
address of the PROFINET interface.
The PROFINET interface (X1) of the CPU 1512SP‑1 PN has three ports. Port 3 is located on the
CPU. Ports 1 and 2 are located on the optional BusAdapter. In addition to the PROFINET
interface, each PROFINET port also has a separate MAC address. There is therefore a total of
four MAC addresses for the CPU 1512SP‑1 PN.
The MAC addresses of the PROFINET ports are needed for the LLDP protocol, for example for
the neighborhood discovery function.
The table below shows how the MAC addresses are assigned.
Table 4-4 Assignment of the MAC addresses
MAC address 1
MAC address 2
MAC address 3
MAC address 4
CPU 1512SP-1 PN (6ES7512-1DM03-0AB0)
Equipment Manual, 11/2022, A5E33591411-AE
Assignment
PROFINET interface X1
• visible in STEP 7 in the case of accessible devices
• Lasered on the front of the CPU
(start of the number range)
Port X1 P1R (required for LLDP, for example)
Port X1 P2R (required for LLDP, for example)
Port X1 P3 (required for LLDP, for example)
Wiring
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