Rockwell Automation 193-DNENCATR EtherNet/IP Communications Auxiliary User Manual - Manual (Page 15)

Rockwell Automation Publication 193-UM014B-EN-P December 2011
15
Chapter
2
Configure the EtherNet/IP Communications
Auxiliary
Introduction This chapter describes how to configure an EtherNet/IP Communications
Auxiliary to operate on an EtherNet/IP network.
When you first install an EtherNet/IP Communications Auxiliary, the module is
Dynamic Host Configuration Protocol (DHCP) enabled.
Determining Network
Parameters To operate an EtherNet/IP network, you must define these parameters.
Table 2 - EtherNet/IP Network Parameters
If DNS addressing is used or if the module is referenced via a host name in an
MSG instruction, the following parameters must be defined.
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.
NOTE: Consult with your Ethernet network administrator to determine if these
parameters need to be specified.