Siemens SIMATIC S7-1500 Manual page 31

Assignment of the MAC addresses
CPU 1516T-3 PN/DP has two PROFINET interfaces, with the first interface having two ports.
The PROFINET interfaces each have a MAC address, and each of the PROFINET ports has
its own MAC address. The CPU 1516T-3 PN/DP therefore has five MAC addresses in total.
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 1516T-3 PN/DP.
The table below shows how the MAC addresses are assigned.
Table 3- 2
MAC address 1
MAC address 2
MAC address 3
MAC address 4
MAC address 5
CPU 1516T-3 PN/DP (6ES7516-3TN00-0AB0)
Manual, 12/2017, A5E40898375-AA
Assignment of the MAC addresses
Assignment
PROFINET interface X1
(visible in STEP 7 for accessible devices)
Port X1 P1 R (required for LLDP,
for example)
Port X1 P2 R (required for LLDP,
for example)
PROFINET interface X2
(visible in STEP 7 for accessible devices)
Port X2 P1 (required for LLDP,
for example)
Connecting up
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
•
(end of number range)
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