1794-AENT is an adapter module for a flex I/O rack. There is no control logix processer associated with a flex I/O rack. There could be one or more Control Logix or Compact Logix PLC racks with 1756-ENBT type modules on the same network communicating to this Flex I/O rack.
In addition to RSLogix5000 and RSLinx (Lite version comes with RSLogix products), you need to make sure that your wireless access point is on the same physical network or at least bridged to the PLC network and that all of the PLCs you need to access are also on the network. I've seen many facilities with a separate production and plant network and you can't get to one from the other or if you can, you need the proper security.
Also, it would be REALLY beneficial to get a map of the plant's PLC communication network. If there isn't one, get busy making one. You'll need to identify the various network types (TCP/IP, ControlNet, DeviceNet, Remote I/O, Profibus, DH+, DH485) and the associated node addresses for each device on these networks. That will go a long way towards connecting to various devices/PLCs.
If you have anything other than ControlLogix PLCs you need to get copies of the most updated offline programs. The comments and descriptions are not stored in the processer but on a PC's harddrive, so to make heads/tales of any program, you'll need that to see the documentation. The plant should have a central repository for these and some method of checkout/checkin so that you know that you always have the latest docs. Nothing worse than Bubba making some changes, documenting it, but he is the only one that has the updated docs. Next time YOU go online with an older offline program, you won't see any of the new docs.
If you have to configure/diagnose DeviceNet or ControlNet networks you'll need additional software (RSNetworx). If you have Profibus, then you likely have an SST card somewhere and should have the config software for that.