Rockwell Automation 1738-AENT, Series B ArmorPOINT I/O Dual Port EtherNet/IP Adapters User Manual - Manual (Page 24)

14 Rockwell Automation Publication 1738-UM005A-EN-P - July 2013
Chapter 3 Configure the Adapter with RSLogix5000 software
Configuration
Requirements Before you can use your adapter, you must configure its IP address, its subnet
mask, and, optionally, a gateway address. You can use the Rockwell BootP utility,
version 2.3 or later, to perform the
configuration. You can also use a DHCP
server or the network address rotary switches to configure these parameters.
If you need to reset the adapter to factory defaults, see Work with the
Configuration Pages on page 92 .
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 the adapter) must have a
unique IP address.
The IP address is 32 bits long and has a Network ID part and 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 physical network must have an IP address of the same
class and must have the same network 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 assigns each 1738
ArmorPOINT I/O Ethernet/IP 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 1738 ArmorPOINT I/O Ethernet/IP
Module, you must enter the new Ethernet hardware address of the
module when you configure the new module.
Class A
Class B
Class C
Network ID
Host ID
Host ID
Host ID
0
0
0
10
0
110
7 8
15 16
31
31
31 23 24
Network ID
Network ID
Range of first integer Class Range of first integer Class
0 1…127 A 192…223 C
128…191 B 224… 255 other