9205 digital input in Compact DAQ sistem

[Padeanu.L]

I have a NI 9205 board and i want to use the digital input to acquire a digital signal from a Diffuse-Mode Laser Sensor, to measure the rpm of an electrical motor. The problem is that i do not have acces to PFI0  in spring terminal mode.In NI Max i can only acquire analog signals. Thank you!

[MarkGrot · Accepted solution]

Hi Padeanu.L,

You are correct that it is not possible to use the 9205 PFI line in MAX using the DAQ Assistant.  It is, however, possible in whatever programming enviornment you prefer (LabVIEW, C, etc.).  The PFI line cannot be used as in a digital task, but it can be used with counters (count edges, period, frequency, etc).  For example, in the example Counter - Count Edges.vi, you can set the input terminal to /9205DeviceName/PFI0 and the counter to /ChassisName/_ctrN where N is the counter you want to use.  The underscore counter is because the 9205 only has a single PFI line that does not support all cDAQ counter modes which is also why it does not show up for you in MAX.