WAGO-I/O-SYSTEM 750 XTR
Fieldbus Communication 139
750-352/040-000 FC ETHERNET G3 XTR
Manual
Version 1.3.0
IP Addresses
To allow communication over the network each fieldbus node requires a 32 bit
Internet address (IP address).
IP Address must be unique!
For error free operation, the IP address must be unique within the network.
The same IP address may not be assigned twice.
As shown below there are various address classes with net identification (net ID)
and subscriber identification (subscriber ID) of varying lengths. The net ID
defines the network in which the subscriber is located. The subscriber ID
identifies a particular subscriber within this network.
Networks are divided into various network classes for addressing purposes:
•
Class A:
(Net ID: Byte 1, Host ID: Byte 2… Byte 4)
Table 54: Network Class A
e. g.
101 .
16
.
232
.
22
01100101
00010000
11101000
00010110
0
Net ID
Host ID
The highest bit in Class A networks is always '0'. This means the highest byte
can be in a range of '0 0000000' to '0 1111111'.
Therefore, the address range of a Class A network in the first byte is always
between 0 and 127.
•
Class B:
(Net ID: Byte 1 … Byte 2, Host ID: Byte 3… Byte 4)
Table 55: Network Class B
e. g.
181 .
16
.
232
.
22
10110101
00010000
11101000
00010110
10
Net ID
Host ID
The highest bits in Class B networks are always '10'. This means the highest byte
can be in a range of '10 000000' to '10 111111'.
Therefore, the address range of Class B networks in the first byte is always
between 128 and 191.
•
Class C:
(Net ID: Byte 1 … Byte 3, Host ID: Byte 4)
Table 56: Network Class C
e. g.
201 .
16
.
232
.
22
11000101
00010000
11101000
00010110
110
Net ID
Host ID
The highest bits in Class C networks are always '110'. This means the highest
byte can be in a range of '110 00000' to '110 11111'.
