Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 281)

Rockwell Automation Publication 193-UM015B-EN-P - June 2014 281
EtherNet/IP Communications Chapter 8
Determining Network
Parameters To operate an EtherNet/IP network, you must define these parameters.
Table 333 - EtherNet/IP Network Parameters
If DNS addressing is used or if the module is referenced via a host name in a MSG
instruction, the following parameters must be defined.
Table 334 - EtherNet/IP Network Parameters for DNS Addressing
Network Parameter Description
IP Address The IP address uniquely identifies the module. The IP address
is in the form xxx.xxx.xxx.xxx where each xxx is a number from
0...255. Do not use the following IP addresses, as these are
reserved values:
• 0.0.0.1...0.255.255.255
• 127.0.0.0...127.255.255.255
• 224.255.255.255...255.255.255.255
Subnet Mask Subnet addressing is an extension of the IP address scheme
that allows a site to use a single network ID for multiple
physical networks. Routing outside of the site continues by
dividing the IP address into a net ID and a host ID via the
class. Inside a site, the subnet mask is used to redivide the IP
address into a custom network ID portion and host ID portion.
NOTE: If you change the subnet mask of an already-
configured module, you must cycle power to the module for
the change to take effect.
Gateway A gateway connects individual physical networks into a
system of networks. When a node needs to communicate
with a node on another network, a gateway transfers the data
between the two networks.
IMPORTANT Consult with your Ethernet network administrator to determine if these
parameters need to be specified.
Network Parameter Description
Host Name A host name is part of a text address that identifies the
module. The full text address of a module is:
host_name.domain_name.
Domain Name A domain name is part of a text address that identifies the
domain in which the module resides. The full text address of a
module is: host_name.domain_name. The domain name has a
48-character limit.
Primary DNS Server Address This identifies any DNS servers used in the network. You must
have a DNS server configured if you specify an SMTP server
with a name. The DNS server converts the domain name or
host name to an IP address that can be used by the network.
For more information on DNS addressing, refer to
page 288 .
Secondary DNS Server Address