WAGO -I/O-SYSTEM 750 Technical Description, Installation And Configuration page 131

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Additional network classes (D, E) are only used for special tasks.
Key data
Class A
Class B
Class C
Each WAGO ETHERNET (programmable) fieldbus coupler or controller can
be easily assigned an IP address via the implemented BootP protocol. For
small internal networks we recommend selecting a network address from
Class C.
Attention
Never set all bits to equal 0 or 1 in one byte (byte = 0 or 255). These are
reserved for special functions and may not be allocated. Therefore, the address
10.0.10.10 may not be used due to the 0 in the second byte.
WAGO-I/O-SYSTEM 750
PROFINET IO
Class B: (Net-ID: Byte1 - Byte2, Host-ID: Byte3 - Byte4)
181 .
e.g.:
10110101 00010000
10 Net-ID
The highest bits in Class B networks are always '10'.
Meaning 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: Byte1 - Byte3, Host-ID: Byte4)
201 .
e.g.:
11000101 00010000
110 Net-ID
The highest bits in Class C networks are always '110'.
Meaning the highest byte can be in a range of
'110 00000' to '110 11111'.
Therefore, the address range of Class C networks in the first byte is always
between 192 and 223.
Address range of the
subnetwork
1.XXX.XXX.XXX -
126.XXX.XXX.XXX
128.000.XXX.XXX -
191.255.XXX.XXX
192.000.000.XXX -
223.255.255.XXX
Fieldbus Communication
16 . 232
11101000
Host-ID
16 . 232
11101000
Possible number of
networks
127
7
(2 )
Ca. 16 thousand
14
(2 )
Ca. 2 million
21
(2 )
ETHERNET
. 22
00010110
. 22
00010110
Host-ID
Subscribers per network
Ca. 16 Million
24
(2 )
Ca 65 thousand
16
(2 )
254
8
(2 )
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