Rockwell Automation Publication 1769-UM021I-EN-P - May 2018 105
Complete Software Tasks Required at CompactLogix 5370 Controller Installation Chapter 5
Change the IP Address of a
Controller
You can change the IP address of a CompactLogix 5370 controller after system
operation has begun. In this case, the controller has an IP address that is
assigned to it, but you must change that IP address.
You can use these tools to change the IP address of a controller:
• RSLinx Classic software
• Studio 5000 Logix Designer application
•SD card
Consider these factors when you determine how to change the IP address of a
controller:
• Network isolation from, or integration into, the plant/enterprise
network
• Network size - For large, isolated networks, it can be more convenient
and safer to use a BOOTP/DHCP server rather than
the Studio 5000 Logix Designer or RSLinx Classic software. A
BOOTP/DHCP server limits the possibility of duplicate IP address
assignment.
However, you can only use the BOOTP/DHCP server to set the IP
address of the controller and not to change it. If you decide to change
the IP address of the controller and want to use a BOOTP/DHCP
server to limit the possibility of duplicate IP address assignment, you
must first clear the IP address.
After clearing the IP address, use the steps that are described at Use the
BOOTP Server to Set the IP Address of the Controller on page 91 or
Use the DHCP Server to Set the IP Address of the Controller on
page 98 to set the IP address of the controller.
• Company policies and procedures that deal with plant floor network
installation and maintenance
• Level of involvement by IT personnel in plant-floor network installation
and maintenance
• Type of training that is offered to control engineers and maintenance
personnel
IMPORTANT You cannot use any of these tools to change the IP address of a controller:
• Bootstrap Protocol (BOOTP) server
• Dynamic Host Configuration Protocol (DHCP) server
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