Why not Allen Bradley Micro800 series?
Free software, easy to learn, easy to program, very affordable, we probably have better than 50 out in the field (at some of the harsh's environments you can imagine (The oilfields)) been in service more than 2 and 1/2 years and almost NO problems.
Free software, easy to learn, easy to program, very affordable, we probably have better than 50 out in the field (at some of the harsh's environments you can imagine (The oilfields)) been in service more than 2 and 1/2 years and almost NO problems.