Appendix C
Common Questions
C-6
ni.com
Timing and Digital I/O
What types of triggering can be hardware-implemented on the
NI 6013/6014?
Digital triggering is hardware-supported on the NI 6013/6014.
I am using one of the general-purpose counter/timers on the device, but
I do not see the counter/timer output on the I/O connector. Why?
If you are using the NI-DAQ language interface or LabWindows/CVI, you
must configure the output line to output the signal to the I/O connector. Use
the
Select_Signal
function in NI-DAQ to configure the output line.
By default, all timing I/O lines except EXTSTROBE* are tri-stated.
What are the PFIs and how do I configure these lines?
PFIs are Programmable Function Inputs. These lines serve as connections
to virtually all internal timing signals.
If you are using NI-DAQ or Measurement Studio, use the
Select_Signal
function to route internal signals to the I/O connector, route external signals
to internal timing sources, or tie internal timing signals together.
If you are using NI-DAQ with LabVIEW and you want to connect external
signal sources to the PFI lines, you can use the AI Clock Config, AI Trigger
Config, AO Clock Config, AO Trigger and Gate Config, and Counter Set
Attribute advanced-level VIs to indicate which function the connected
signal serves. Use the Route Signal VI to enable the PFI lines to output
internal signals.
Caution
If you enable a PFI line for output, do
not
connect any external signal sources to
it; if you do, you can damage the device, the computer, and the connected equipment.
