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Use DHCP Software to
Configure Your Module
3. Enter a file name for the Relation List (for example, control system
configuration) and click Save.
If you want to see your saved file names in the Open dialog box, save your
files using the default file type (*.bpc).
Dynamic Host Configuration Protocol (DHCP) software automatically assigns
IP addresses to client stations logging onto a TCP/IP network. DHCP is based
on BootP and maintains some backward compatibility. The main difference is
that BootP was designed for manual configuration, while DHCP allows for
dynamic allocation of network addresses and configurations to newly attached
devices.
Be aware that a DHCP server typically assigns a finite lease time to the offered
IP address. When 50 percent of the leased time has expired, the module will
attempt to renew its IP address with the DHCP server. The module could be
assigned a different IP address, which would cause communicating with the
ControlLogix controller to cease.
ATTENTION: To avoid unintentional control, the module must be assigned a fixed
IP address. The IP address of this module should not be dynamically provided. If a
DHCP server is used, it must be configured to assign a fixed IP address for your
module.
Failure to observe this precaution may result in unintended machine motion or
loss of process control.
Rockwell Automation Publication 1732E-UM003D-EN-E - November 2021
Chapter 5
Configure the Module for Your EtherNet/IP Network
33
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