Rockwell Automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual - Manual (Page 95)

Publication 1794-UM061A-EN-P - July 2006
Configure your Digital Module on an EtherNet/IP Network 93
Data type with tag names are produced by the program.
General Information About
IP Addresses
The following information outlines steps you must take if initially setting up
your EtherNet/IP network.
Determining Required Network Parameters
To operate on an EtherNet/IP network, you must define these parameters.
EtherNet/IP Parameter: Description:
IP address The IP address uniquely identifies the module. The IP address is in the form xxx.xxx.xxx.xxx
where each xxx is a number between 0-255. These are reserved values you cannot use:
• 127.0.0.1
• 0.0.0.0
• 255.255.255.255
subnet mask Subnet addressing is an extension of the IP address scheme that allows a site to use a
single network ID for multiple physical networks. Routing outside of the site continues by
dividing the IP address into a net ID and a host ID via the class. Inside a site, the subnet
mask is used to redivide the IP address into a custom network ID portion and host ID portion.
This field is set to 0.0.0.0 by default.
If you change the subnet mask of an already-configured module, you must cycle power to
the module for the change to take effect.
gateway A gateway connects individual physical networks into a system of networks. When a node
needs to communicate with a node on another network, a gateway transfers the data
between the two networks. This field is set to 0.0.0.0 by default.