ab

from where i can downloadable micro logix 500 software currently i am working with microlite ..and what is the major difference between both soft ware

There is a free version of RSLogix 500 that can program the Micrologix 1000 and 1100. If you need to do more, you'll have to purchase a license of the full version. Contact your local Allen-Bradley distributor.

http://www.ab.com/linked/programmablecontrol/plc/micrologix/downloads.html