Operation
7.6 Communication via PROFINET IO
SINAMICS DCP
Operating Instructions, 09/2019, A5E34382853K
249
7.6.1.2 Addresses
MAC address
Every Ethernet and PROFINET interface is assigned a worldwide unique device identifier in
the factory. This 6-byte long device identifier is the MAC address. The MAC address is
divided up as follows:
● Three bytes for the manufacturer's ID
● Three bytes for the device identifier (consecutive number)
The MAC address is on a label (CBE20), e.g. 08-00-06-6B-80-C0
IP address
The TCP/IP protocol is a prerequisite for establishing a connection and for parameter
assignment. To allow a PROFINET device to be addressed as a node on Industrial Ethernet,
this device requires a unique IP address in the network. The IP address is made up of 4
decimal numbers with a range of values from 0 through 255. The decimal numbers are
separated by a decimal point. The IP address comprises:
● The address of the node (also called host or network node)
● The address of the (sub) network
IP address assignment
The IP addresses of IO devices can be assigned by the IO controller and always have the
same subnet screen as the IO controller. In this case, the IP address is not stored
permanently. The IP address entry is lost after POWER ON/OFF. The IP address can be
assigned retentively via the STARTER function "Accessible nodes".
This function can also be performed with HW Config of STEP 7. Here, the function is called
"Edit Ethernet node".
Note
If the network is part of an existing Ethernet
company network, obtain the information (IP
address) from your network administrator.
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