Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 176)

Publication 1785-UM012D-EN-P - July 2005
11-2 Communicating with Devices on an Ethernet Network
Assigning Your IP Address Contact your network administrator or the Network Information Center for a
unique IP address to assign to your PLC-5/20E, -5/40E, or 5/80E controller.
Network Addressing Because the Ethernet PLC-5 controller uses the TCP/IP protocol, each
controller on the network requires a unique IP address. The IP address is
software-configurable using either the BOOTP protocol or your programming
software.
If you are using the BOOTP protocol, you must also obtain the hardware
Ethernet address. Rockwell Automation assigns each Ethernet PLC-5
controller a hardware Ethernet address at the factory. Look for the address
either:
• in the back, upper corner of your module; or
• in the channel 2 configuration screen of your programming software
Configuring Channel 2 for
Ethernet Communication After you assign a unique IP address to your Ethernet PLC-5 controller, you
must configure channel 2 so your network recognizes the controller. Configure
this channel using one of two methods:
• manually entering module configuration information using the screens
within your programming software package
• entering module configuration information using a BOOTP utility (use
a BOOTP server on your network to edit the BOOTPTAB file)
Manually Configuring Channel 2
The default for the Ethernet PLC-5 controller is BOOTP enabled. You must
first disable BOOTP before you can use the programming software to enter
module configuration information.