Just use our Omnii-Comm module to communicate the bar code information to the MicroLogix. You can see more information here http://www.miille.com/din266-p00.pdf about our protocol converter products.
We have a device that works great for your application. Our gateway will send and or receive ASCII data and send it to a tag in your plc. You may send it to an integer tag or string tag. Easy setup using your web browser. There is maybe 2 rung of logic to program. Check it out: