Greetings dbowyer ..
first of all, you want to save the stuff that’s already in the ControlLogix to a file on your computer ... correct? ...
big question: do you have a copy of RSLogix5000 software? ... if the answer is “no” then you’re dead in the water ... you’ll either have to buy a copy or get someone who has a copy to help you ...
next issue: the version (11, 12, 13, 15, etc.) of RSLogix5000 should match the version of the existing program in the ControlLogix processor ... specifically, suppose that you have version 15.xx of RSLogix5000 ... suppose that the ControlLogix processor has been programmed with version 13.xx ... oops! ... that’s not good ...
I second the advice from my distinguished colleague LJBMatt ... it would be a good idea to have someone come in and do this for you - at least the first time ... it’s not a big job, by any means ... but there are a LOT of little steps that have to be done correctly ... once you’ve seen it done, then you’ll be in a much better position to handle it yourself from then on ...
SURVIVAL TIP: in your first post you said that you want to “download” the Logix5550 program to your laptop for safekeeping ... actually you used the wrong word there ... technically what you described is an “UPLOAD” and NOT a “DOWNLOAD” ... worse case scenario: if you click the wrong menu selection it’s possible to GO-THE-WRONG-WAY and mess up the existing program in the processor ... that would definitely fall squarely into the “BAD” column on the giant clipboard of life’s experiences ...
moving forward: tell us more about what resources you have available to work with and we’ll try to offer more detailed advice ...