Rockwell Automation 1785-ENET PLC-5 Ethernet Interface Module Installation Instructions - Manual (Page 23)

PLC-5 Ethernet Interface Module 23
Publication 1785-IN019B-EN-P - January 2007
After entering the channel 3A configuration information, either accept edits or access status
information about channel 3A.
Use BOOTP to Enter Configuration Information
BOOTP is a protocol that supplies the interface module with configuration information
when you apply power. BOOTP lets you dynamically assign IP addresses to devices on the
Ethernet link.
To use BOOTP, a BOOTP server must exist on the local Ethernet subnet. The server is a
computer (either a personal computer, VAX, or UNIX system) that has BOOTP-server
software installed and reads a text file containing network information for individual nodes
on the network.
To enable BOOTP, follow the steps specified in your programming software documentation
to specify Ethernet configuration information.
When BOOTP is enabled, the following events occur when you cycle power:
• The controller broadcasts a BOOTP-request message containing its hardware address
over the local network or subnet.
• The BOOTP server compares the hardware address with the addresses in its look-up
table in the BOOTPTAB file.
• The BOOTP server sends a message back to the controller with the IP address and
other network information that corresponds to the hardware address it received.
Inactivity
timeout The number of minutes of
inactivity before the
connection is closed Cursor to the field, and enter a timeout period in minutes. The valid range for a
timeout period is 0...65,535 minutes.
The default is 30 minutes.
Broadcast
address The broadcast address to
which the controller
should respond See the Enhanced and Ethernet PLC-5 Programmable Controllers User Manual,
publication 1785-UM012, for information about how to configure these
advanced Ethernet functions.
Subnet mask The controller’s subnet
mask (used when network
has subnets)
Gateway
address The IP address of the
gateway that provides a
connection to another IP
network
Link ID A DH+ link number
Use the link ID number to
identify the controller
when configuring a
ControlLogix system using
the ControlLogix Gateway
software
Enter a link ID number. The valid range is 0...199.
Only enter a Link ID number if you plan to configure multihop MSG instructions
through a 1756-DHRIO module in a ControlLogix chassis.
This Field Specifies Configure by Doing the Following