Siemens Simatic S7 Series System Manual

Communication
8.4 Ethernet
S7-200 SMART
370 System Manual, 09/2015, A5E03822230-AC
8.4.6
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.
Note
Each CPU is loaded at the factory with a permanent, unique MAC address. You cannot
change the MAC address of a CPU.
The MAC address is printed on the front, upper-left corner of the CPU. Note that you have to
open the upper door to see the MAC address information.
①
MAC address

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.