SEW-Eurodrive ECDriveS, Manual, Page: 13 / 56

3
Assembly and installation notes
TCP/IP addressing and subnetworks
Manual – ECDriveS
®
13
• IP address
• Subnet mask
• Standard gateway
The addressing mechanisms and subdivision of the TCP/IP networks into subnet-
works are explained in this chapter to help you set the parameters correctly.
3.4.1 MAC address
The MAC address (Media Access Controller) is the basis for all address settings. The
MAC address of an Ethernet device is a globally unique 6‑byte value (48 bits).
The MAC address is difficult to handle for large networks. This is why freely as-
signable IP addresses are used.
3.4.2 IP address
The IP address is a 32-bit value that uniquely identifies a node in the network. An IP
address is represented by 4 decimal numbers separated by decimal points.
Each decimal number stands for 1 byte (8 bits) of the address and can also be repres-
ented using binary code:
Exemplary IP address: 192.168.10.4
Byte Decimal Binary
1 192 11000000
2 168 10101000
3 10 00001010
4 4 00000100
The IP address comprises a network address and a node address.
The part of the IP address that denotes the network and the part that identifies the
node is determined by the network class and the subnet mask.
3.4.3 Network class
The first byte of the IP address determines the network class and as such represents
the division into network addresses and node addresses:
Range of
values
(Byte 1 of IP
address)
Network
class
Example: Complete
network address
Meaning
0 – 127 A 10.1.22.3
10 = Network address
1.22.3 = Node address
128 – 191 B 172.16.52.4
172.16 = Network address
52.4 = Node address
192 – 223 C 192.168.10.4
192.168.10 = Network address
4 = Node address
Node addresses that consist only of zeros or ones are not permitted. The smallest ad-
dress (all bits are zero) describes the network itself and the largest address (all bits
are 1) is reserved for the broadcast.
25938274/EN – 01/2019