Question. I inherited the the following PLCs without any software. 1769-L16ER 1769-L36 ERM1768 L43/A 1756-L73 I'm trying to obtain the software but I know the version needs to match the firmware. Can I use RS linx classic lite to find that out? Will the classic lite that is a free download communicate enough for me to get the information I need before upgrading? Thanks