RT: 9512 modules fault when using hybrid mode

Question

Hello, I am having an issue with my cRIO hyrbid setup. I am currently using Labview 2010, cRIO 9074, x1 NI 9234, and x3 NI 9512.
Summary:
What you are trying to accomplish?
-I have built two VIs. One that acquired data from an NI 9234. This vi is the one that uses the FPGA due to 51.2kHz sampling frequency needs. The other is to control the motion and encoder reading of three NI 9512s (scan mode). They both work fine separately (on the same FPGA bitfile), but when I copy and paste the VI for the NI 9234 into the VI for the x3 9512s and click run, the motors fault out.
What steps are necessary to reproduce any problems?
click run on the attached (prepared program_2VItesting.vi).
What steps, if any, you have taken to solve any problems and the results of your attempts
-I have confirmed that if i run the two VIs separately, they work fine. The very first time i combine the two VIs the 9512s work for a second (i.e. the motors move a little). Then it faults. I then used distribution manager to clear the fault and run it again (note: there is no fault code, i just clear the red light on the module by changing to configuration mode then active mode). Every time after the first time the motors do not move at all.
- I have confirmed that i did correctly setup the hybrid mode based on this kB:
http://digital.ni.com/public.nsf/allkb/0DB7FEF37C26AF85862575C400531690
I have attached the vi of the two VIs combined together(prepare program_2VITesting.vi). The top half is the copied and pasted FPGA program (as noted by the open VI reference) and the bottom is the scan mode (as noted by the timed loop). I also attached the seperate VIs (JustDAQ and prepared program) that can both function right now by justing pressing run.
Am i just missing something simple here?
Thanks,
Troy
Solved!
Go to Solution.
Attachments:
prepared program_2VITESTING.vi ‏1369 KB
prepared program_ThisWORKS.vi ‏445 KB
JustDAQ.vi ‏930 KB

Answer 1

Hello Troy_B,
Thanks for the post, here is a useful KB describing how to use Scan Engine and FPGA simultaneously. Please take a look at this documentation and make sure you have everything configured correctly for Hybrid Mode.
http://digital.ni.com/public.nsf/allkb/0DB7FEF37C26AF85862575C400531690
Note:
Hybrid Mode has longer compile time because the compiler has to combine the RIO Scan Interface bitfile and the FPGA code into one bitfile.
The number of DMA FIFO's available for FPGA code is reduced since the scan engine uses 2 DMA FIFO's.
Here is an example of what your final project should look like with Mod1 in Scan Mode and Mod2 in FPGA Mode:
Hope this helps!
Paul-B
Applications Engineer
National Instruments