Technical data

ETHERNET • 123
Network Communication
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
• Class C: (Net-ID: Byte1 - Byte3, Host-ID: Byte4)
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.
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.
Additional network classes (D, E) are only used for special tasks.
More information
A more detailed description of these principles is found on the Internet under
http://www.WuT.de/us_printmed.html (W&T, Manual TCP/IP-ETHERNET for
Beginners).
Key data
Address range of the Possible number of
subnetwork networks Subscribers per network
Class A
1.XXX.XXX.XXX -
126.XXX.XXX.XXX
127
(2
7
)
Ca. 16 Million
(2
24
)
Class B
128.000.XXX.XXX -
191.255.XXX.XXX
Ca. 16 thousand
(2
14
)
Ca 65 thousand
(2
16
)
Class C
192.000.000.XXX -
223.255.255.XXX
Ca. 2 million
(2
21
)
254
(2
8
)
Each WAGO ETHERNET fieldbus coupler/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.
If a network is to be directly connected to the Internet, only registered,
internationally unique IP addresses allocated by a central registration service
may be used. These are available from InterNIC (International Network
Information Center).
Attention
Direct connection to the Internet should only be performed by an authorized
network administrator and is therefore not described in this manual.