Serial Port example for CompactRIO 9074 and NI 9870

[Siddhant]

I have a compactRIO 9074 and a serial (RS232) NI 9870 module. I am trying to find an example for loopback serial test for this. The example I found in the Example Finder has 3 targets  cRIO - 900x,  cRIO - 910x, and the third one is also cRIO - 900x. I am not sure which one is appropriate for my purpose. Can I even use any of those examples or is there a different approach with cRIO 9074. Please refer me to an example that I can use and also how would I move that example to my Project.

Thank you 

Siddhant shah

[Christian Mergl]

Hey,

900x are controllers

910x are the backplanes with the FPGA

9074 is a combination of that, so controller and backplane in one.

For using the examples its just necessary to have the module, so 9870.

You can use them with simpley open a project for your 9074 and then add the VIs from the example to your project. you will need to replace the I/O nodes, so the read/write nodes in the example with yours from the project.

Christian

[dskrabacz]

Hi,

I am dealing with the CompactRIO 9074 and I have connected the 9870 up to this chassis. I am using the example virtual instrument that was recommended from James. I was able to input all of my Read_FIFO and Write_FIFO with my specific ports, and have modified the ports. When I run the FPGA program, it initializes to step 7, and then exits with the following error message: "Too many DMA channels have been requested or some requested are conflicting. The current target has 3 DMA channels." Does anyone have a fix for this? Thanks.

-Daniel Skrabacz

[dskrabacz]

Hi,

I am dealing with the CompactRIO 9074 and I have connected the 9870 up to this chassis. I am using the example virtual instrument that was recommended from James. I was able to input all of my Read_FIFO and Write_FIFO with my specific ports, and have modified the ports. When I run the FPGA program, it initializes to step 7, and then exits with the following error message: "Too many DMA channels have been requested or some requested are conflicting. The current target has 3 DMA channels." Does anyone have a fix for this? Thanks.

-Daniel Skrabacz