HMS Anybus X-gateway CANopen User Manual page 19

Configuration
4.3.2 Network Configuration
To be able to communicate over Ethernet the network interface needs a valid TCP/IP
configuration. This section explains some basic concepts and describes how to configure the
TCP/IP settings in Anybus X-gateway CANopen using the IPconfig software tool.
When Ethernet communication has been established the TCP/IP settings can also be changed
from the web interface. See
Basic TCP/IP Concepts
IP Address
The IP address is used to identify each node on a TCP/IP network. IP addresses are written as
four decimal integers (0–255) separated by dots, where each integer represents the binary value
of one byte of the IP address. This is known as dot-decimal notation.
Example: 10000000 00001010 00000010 00011110 is written as 128.10.2.30
The following IP addresses are reserved for special purposes and cannot be used:
0.n.n.n
127.n.n.n
n.n.n.0
n.n.n.255
Subnet Mask
The IP address is divided into three parts: Net ID, Subnet ID and Host ID. A subnet mask is a 32-
bit binary pattern, where a set bit allocates a bit for Network/Subnet ID, and a cleared bit
allocates a bit for the Host ID. The subnet mask is usually written in dot-decimal notation.
Example: To make the IP address 128.10.2.30 belong to subnet 128.10.2, the subnet
mask must be 255.255.255.0.
Default Gateway
For devices to be able to communicate over Ethernet they must either belong to the same
subnet or communicate via a gateway or router.
A gateway or router routes communication between networks, i.e. it enables the nodes on one
network to access the nodes on another. The default gateway address in the TCP/IP settings of
your product specifies the IP address of the gateway or router on the local network.
Anybus ® X-gateway ™ CANopen ® PROFINET
Web Pages, p. 21.
First byte zero — used for broadcast messages
First byte 127 — used for loopback addresses to the local host
Last byte zero — identifies a whole network/subnet
Last byte 255 — used for broadcast messages
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