Multifunction DAQ

cancel
Showing results for 
Search instead for 
Did you mean: 

DAQmx timing source problem

Hi,
 
I have a timed loop, which is supposed to be triggered by an external timing source through the DAQmx create timing source (Digital Edge).vi.
The counter ctr_0 of my PXI 6221 is supposed to be triggered by a PXI bus signal sent out by my PXI-7831R FPGA card. The FPGA writes the 100us trigger signal to PXITrig1.
 
This method seems to be the only way to use my FPGA as a timing source for the timed loop.
 
I wired the counter name (PXI1Slot3/ctr_0) and the source name (/PXI1Slot3/PXI_Trig1) as well as the "rising" constant to the vi.
 
I get the following error:
 
Error #: -223747
Description: DAQmx Create Channel (CI-Count Edges).vi<append><B>Task Name: </B>_unnamedTask<2D>
 
What's the problem?
 
Thanks,
Chris
0 Kudos
Message 1 of 2
(2,822 Views)
Hi,
 
I found the solution to the problem: using the latest NI-DAQmx drivers v.8.0.
 
It was directly related to my M-series card (PXI 6221) not correctly working in my PXI chassis due to apparently bad drivers or a bug in version 7.5.
 
Christoph
0 Kudos
Message 2 of 2
(2,799 Views)