Siemens SIMATIC S7-1500 Manual page 33

Connecting up
Assignment of the MAC addresses
The CPU 1511-1 PN has a PROFINET interface with two ports. The PROFINET interface itself
has a MAC address, and each of the two PROFINET ports has its own MAC address. The
CPU 1511-1 PN therefore has three 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 address are
lasered on the rating plate on the right side of each CPU 1511-1 PN.
The table below shows how the MAC addresses are assigned.
Table 3- 2
MAC address 1
MAC address 2
MAC address 3
32
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)
Labeling
• Front, lasered
• Right side, lasered
(start of number range)
• Front and right side, not lasered
• Front, not lasered
• Right side, lasered
(end of number range)
CPU 1511-1 PN (6ES7511-1AK02-0AB0)
Equipment Manual, 05/2021, A5E40869673-AB