88 Rockwell Automation Publication 1769-UM021I-EN-P - May 2018
Chapter 5 Complete Software Tasks Required at CompactLogix 5370 Controller Installation
The IP address uniquely identifies the controller. The IP address is in the form
xxx.xxx.xxx.xxx where each xxx is a number from 000
…254 with some
exceptions for reserved values. These numbers are examples of reserved values
you cannot use:
• 000.xxx.xxx.xxx
• 127.xxx.xxx.xxx
• 224 to 255.xxx.xxx.xxx
Some other values are reserved based on an application-by-application basis.
You can complete one of these tasks dependent on system conditions:
• Set the IP address for a controller that does not have one assigned.
• Change the IP address for a controller that has an IP address that is
assigned to it.
IMPORTANT CompactLogix 5370 controllers have two EtherNet/IP ports to connect to an
EtherNet/IP network. The ports carry the same network traffic as part of the
embedded switch of the controller. However, the controller uses only one IP
address.
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