Rockwell Automation 1732E-OB8M8SR EtherNet/IP Dual Port 8-Point SOE Input and Scheduled Output Modules UM - Manual (Page 34)

24 Rockwell Automation Publication 1732E-UM003B-EN-E - March 2014
Chapter 5 Configure the Module for Your EtherNet/IP Network
If the module needs to be reset to factory defaults, set the switches on the module
to the value 888 and then cycle power to the module.
IP Address
The IP address identifies each node on the IP network (or system of connected
networks). Each TCP/IP node on a network (including your module) must have
a unique IP address.
The IP address is 32 bits long and has a net ID part and a Host ID part. Networks
are classified A, B, C, (or other). The class of the network determines how an IP
address is formatted.
You can distinguish the class of the IP address from the first integer in its dotted-
decimal IP address as follows:
Each node on the same logical network must have an IP address of the same class
and must have the same net ID. Each node on the same network must have a
different Host ID thus giving it a unique IP address.
IMPORTANT If using the BootP/DHCP utility, you will need to know the
Ethernet hardware address of your module.
Rockwell Automation assigns each module a unique 48-bit
hardware address at the factory. The address is printed on a
label on the side of your module. It consists of six
hexadecimal digits separated by colons. This address is fixed
by the hardware and cannot be changed.
If you change or replace the module, you must enter the
new Ethernet hardware address of the module when you
configure the new module.
Class C Net ID Host ID
Class B Net ID Host ID
Class A Net ID Host ID 0
0
0
1 0
1 1 0
0
7 8 31
15 16 31
23 31 24
Classes of IP Addresses
Range of first integer Class Range of first integer Class
0…127 A 192…223 C
128...191 B 224…255 other