Bit switches: You need to manually determine the value of the switch. For instance, if you are using just two bits then it follows:
Bit one Bit two
False False = 0
True False = 1
False True = 2
True True = 3
something like this. The switches are your DIO inputs.
The slot is the module, you probably don't really need to set it and just use the default (module 4). For the channel, right click on the terminal select CREATE then select CONSTANT and select the proper DIO channel (1 or 2?)
I've attached some simple logic for 4 bits. There is probably a much more effecient way to do this in LabVIEW than this; but it does work
Sean