How to set a CompactLogix Ethernet address through its Serial Port

RSLinx-to-CompactLogix-Change-IP-FiIn today’s article I walk you  through how to set or change a CompactLogix processor’s Ethernet address through its Serial Port using RSLinx Classic.

Step 1) Confirm your RSLinx RSWho window browses your CompactLogix via the DF1 driver

Open RSLinx and check to be sure your CompactLogix is showing up under the Serial DF1 driver as shown below:


NOTE: If you would like to learn how to setup an RSLinx driver to communicate to a CompactLogix processor using a serial connection, see our previous article HERE.

Step 2) Expand the CompactLogix in RSWho

Next, click on the small “plus” symbol to the left of your CompactLogix in order to browse its contents:

RSLinx to CompactLogix Change IP 2 Expand-L23h

Step 3) Expand “Backplane” under processor

Now expand the “Backplane” device under the processor:

RSLinx to CompactLogix Change IP 3 Expand-Backh

Step 4) Select the Ethernet device

The next step is to select the Ethernet Card / Module underneath the “Backplane” as shown below:

RSLinx to CompactLogix Change IP 4 Select-Eneth

Step 5) Right click on Ethernet device and select Module Configuration

Right click on the Ethernet card and select “Module Configuration” from the menu as shown below:

RSLinx to CompactLogix Change IP 5 Right-Click-Mod-Proph

Step 6) Select the “Port Configuration” tab

In the popup window select the “Port Configuration” tab:

RSLinx to CompactLogix Change IP 6 Port-Configh

Step 7) Enter in a new Ethernet address and insure “Static” is selected

Now you can enter in an Ethernet address for your CompactLogix’s Ethernet port. Also be sure “Static” is selected, and then click on OK:

RSLinx to CompactLogix Change IP 7 Enter-IP-and-Press-OKh

Step 8) Accept Configuration

The final step is to accept the configuration by clicking on “Yes,” after which your CompactLogix will have the Ethernet address you entered above:

 RSLinx to CompactLogix Change IP 8 Confirmh

NOTE: You can watch me run through the above steps in today’s video episode of The Automation Minute!

I hope the above article on how to set or change a CompactLogix’s Ethernet address through its serial port using RSLinx was helpful.

If you have any questions or comments, please feel free to share them with us by filling in the “Leave a reply” form at the bottom of this page.


Shawn Tierney
Automation Consultant
Insights In Automation

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