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Chapter 5
Configure the Module for Your EtherNet/IP Network
Set the Network Address
Use the Rockwell
Automation BootP/DHCP
Utility
30
The I/O block ships with the rotary switches set to 999 and DHCP enabled. To
change the network address, you can do one of the following:
1. Adjust the switches on the front of the module.
2. Use a Dynamic Host Configuration Protocol (DHCP) server, such as
Rockwell Automation BootP/DHCP.
3. Retrieve the IP address from nonvolatile memory.
The I/O block reads the switches first to determine if the switches are set to a
valid number. Set the network address by adjusting the 3 switches on the front
of the module. Use a small blade screwdriver to rotate the switches. Line up the
small notch on the switch with the number setting you wish to use. Valid
settings range from 001...254.
Figure 7 - Network Address Example
This example shows the
network address set at
163
Note: You need to remove the protective
switch dust caps before you can adjust
the address settings.
When the address switches are set to a value of 1, the default gateway address
is 0.0.0.0. When the address switches are set from 002...254, the default
gateway address is 192.168.1.1.
When the I/O block uses the network address set on the switches, the I/O block
does not have a host name assigned to it or use any Domain Name Server.
If the switches are set to an invalid number (for example, 000 or a value greater
than 254, excluding 888), the I/O block checks to see if DHCP is enabled. If
DHCP is enabled, the I/O block asks for an address from a DHCP server. The
DHCP server also assigns other Transport Control Protocol (TCP) parameters.
If DHCP is not enabled, and the switches are set to an invalid number, the I/O
block uses the IP address (along with other TCP configurable parameters)
stored in nonvolatile memory.
The Rockwell Automation BootP/DHCP utility is a standalone program that
incorporates the functionality of standard BootP/DHCP software with a user-
friendly graphical interface. The module must have DHCP enabled (factory
default and the network address switches set to an illegal value) to use the
utility.
To configure your module using the BootP/DHCP utility, perform the
following steps:
1. Run the BootP/DHCP software.
The BOOTP/DHCP Request History dialog appears showing the
hardware addresses of devices issuing BootP/DHCP requests.
Rockwell Automation Publication 1732E-UM003D-EN-E - November 2021
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