by David » Sun Apr 22, 2012 4:38 pm
If you assigned your mod wheel in Logic's controller assignments, then the MIDI data is hijacked before it even reaches Logic's physical input object. So you won't be able to see/access that data other than for what you've assigned it to do.
If you don't know whether or not that's your current situation, try choosing Logic Pro > Preferences > Control Surfaces > Bypass All Control Surfaces, and then see if you can use your mod wheel as expected?