Automation Direct's DL-05 controller is pretty versatile for communications; it will support K-Sequence, DirectNET, and Modbus RTU Slave.
RSLinx software from Rockwell Software supports none of those protocols; it's oriented toward Allen-Bradley networks.
Tom Jenkins is right on with the PC-DSDATA DDE server that will get data easily into Microsoft Excel via K-Sequence or DirectNet.
For Modbus RTU, there are several vendors, such as KEPware and Software Toolbox who sell Modbus DDE servers.
I recommend that you stick with Automation Direct's own products to keep your learning curve to a minimum and the technical support all in one place.