When dealing with data recorded in ASCII format using OpenSignals (r)evolution, a useful piece of information is the meaning of the file content.
The first 5 columns correspond to a 4-bit sequence number generated on the device for control (Col. 1), the state of the 2 digital inputs (Cols. 2 & 3), the state of the 2 digital outputs (Cols. 4 & 5), and the analog input channels A1-A6 (Cols. 6-).
Detailed information on the header contents and other file formats can be found here:
The BITalino Team