Locating The Ethernet (Mac) Address On The Cpu - Siemens SIMATIC S7 System Manual

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The IP address of a CPU is not associated with a STEP 7-Micro/WIN SMART project.

Opening a STEP 7-Micro/WIN SMART project does not automatically select an IP address

or establish a connection to a CPU. Every time you create a new or open an existing

STEP 7-Micro/WIN SMART project, you must go to the Communications dialog to establish

a connection to a CPU. The Communications dialog will show the last selected CPU.

Locating the Ethernet (MAC) address on the CPU

In Ethernet networking, a Media Access Control address (MAC address) is an identifier

assigned to the network interface by the manufacturer for identification. A MAC address

usually encodes the manufacturer's registered identification number.

The standard (IEEE 802.3) format for printing MAC addresses in human-friendly form is six

groups of two hexadecimal digits separated by hyphens (-) or colons (:), for example, 01-23-

45-67-89-ab or 01:23:45:67:89:ab.

Each CPU is loaded at the factory with a permanent, unique MAC address. You cannot

change the MAC address of a CPU.

S7-200 SMART

System Manual, V2.3, 07/2017, A5E03822230-AF

Communication

8.4 Ethernet

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