SEW-Eurodrive DFE32B PROFINET IO Manual page 23

determine the node address (→ following table).
IP address
Subnet mask
The class C network with the address 192.168.10. is further subdivided into
255.255.255.128 using the subnet mask. Two networks are created with the address
192.168.10.0 and 192.168.10.128.
The following node addresses are permitted in the two networks:
•
•
The network nodes use a logical AND operation for the IP address and the subnet mask
to determine whether there is a communication partner in the same network or in a dif-
ferent network. If the communication partner is in a different network, the standard gate-
way is addressed.
Standard gateway The standard gateway is also addressed via a 32-bit address. The 32-bit address is rep-
resented by four decimal numbers separated by decimal points.
Example: 192.168.10.1
The standard gateway establishes a connection to other networks. In this way, a net-
work node that wants to address another node can use a logical AND operation with the
IP address and the subnetwork mask to decide whether the desired node is located in
the same network. If this is not the case, the node addresses the standard gateway
(router), which must be part of the actual network. The standard gateway then takes on
the job of transmitting the data packages.
Manual – DFE32B Fieldbus Interface PROFINET IO
Assembly and Installation Notes
TCP/IP addressing and subnetworks
decimal
binary
decimal
binary
192.168.10.1 ... 192.168.10.126
192.168.10.129 ... 192.168.10.254
Byte 1 Byte 2
192 . 168.
11000000 . 10101000
255 . 255
11111111 . 11111111
Byte 3 Byte 4
. 10 . 128
. 00001010 . 10000000
. 255 . 128
. 11111111 . 10000000
4
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