Rockwell Automation 1766-Lxxxx MicroLogix 1400 Programmable Controllers User Manual - Manual (Page 377)

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 337
Connecting to Networks via Ethernet Interface Appendix G
The host system’s BOOTP configuration file must be updated to service requests
from MicroLogix 1400 controllers. The following parameters must be
configured:
When BOOTP is enabled, the following events occur at power-up:
• The processor 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.
• The BOOTP server sends a message back to the processor with the IP
address and other network information that corresponds to the hardware
address it received.
With all hardware and IP addresses in one location, you can easily change
IP addresses in the BOOTP configuration file if your network needs to be
changed.
The BOOTP request can be disabled by clearing the BOOTP Enable parameter
in the channel configuration file. When both BOOTP Enable and DHCP are
cleared (disabled), the MicroLogix 1400 uses the existing channel configuration
data.
Using the Rockwell Automation BOOTP/DHCP Utility
The Rockwell Automation BOOTP/DHCP server utility is a standalone
program that incorporates the functionality of standard BOOTP software with a
user-friendly graphical interface. It is located in the Utils directory on the
RSLogix 500/RSLogix Micro installation CD.
Configuration Parameters
Parameter Description
IP Address A unique IP Address for the MicroLogix 1400 controller.
Subnet Mask Specifies the net and local subnet mask as per the standard on subnetting RFC
950, Internet Standard Subnetting Procedure.
Gateway Specifies the IP address of a gateway on the same subnet as the
MicroLogix 1400 that provides connections to another IP network.
TIP You can use any commercially available BOOTP server. If you do not
have BOOTP Server capabilities on your network, and you want to
dynamically configure Channel 1, you can download the free Rockwell
Automation BOOTP server from the Rockwell Automation website. Go
to
http://www.ab.com/networks/ethernet/bootp.html .
IMPORTANT If BOOTP is disabled, or no BOOTP server exists on the network, you
must use RSLogix 500/RSLogix Micro programming software to
enter/change the IP address for each processor or you must use DHCP
instead of it.