Finding a MicroLogix 1100's IP and MAC Address


The MicroLogix 1100 includes an Ethernet port with a fixed MAC address, as well as a settable Ethernet IP address. In today's article we'll show you how to find both.

Finding the MAC address on a MicroLogix 1100:

1) Thankfully, each MicroLogix 1100 comes with it's unique MAC address stenciled on it. To find it, remove the battery compartment cover on the right side of the Micro:


2) At the very bottom of the compartment, directly under the battery plug, you will see the MicroLogix 1100 MAC address. . The MAC Address of the unit pictured below is: 00:0F:73:00:23:26


Finding the IP and MAC address of a MicroLogix 1100 using the built-in LCD:

1) When the MicroLogix 1100 is powered on, it displays the I/O Status screen as shown below:


2) To find the Micro's IP and MAC address using the LCD,  we need to access it's menu. To do this, press the ESC button and you should see the display below:


3) Next, press the down arrow button four times to select “Advanced Set,” then press the OK button:


4) Here, press the down arrow button twice to select “ENET CFG,” then press the OK button:


5) Now you will see displayed the MAC address followed by the IP address of your MicroLogix 1100.


6) To return to the I/O Status display, press the ESC button until you see the main menu, and then select “I/O Status” and press the OK button:


I hope the above procedure on how to find a MicroLogix 1100's IP and MAC address was helpful.

If you have any comments, questions, suggestions, or corrections, please feel free to leave them with us by filling out the “post a comment or question” link below.


Shawn Tierney
Automation Instructor and Blogger
If you enjoyed my article, you may like my courses at


Old Comment:

  1. Hi all,kindly assist on how to configure ML1100 Processor and Windows 7 Ultimate Laptop via Ethernet using a Dlink WIFI Router.Thanks in advance.

    • Good afternoon Emmanuel,

      Use BOOTP, details are in the 1100’s users manual.

      This is assuming your 1100 is plugged into your Ethernet switch as it does not have wireless?

      I also cover this step by step in my PLC Basics course:

      Hope this helps,

      Shawn Tierney

      If you enjoyed reading my article you may also like my affordable training courses at