Calorified

You mean read the MV variable inside the bottom loop? You seem to be suggesting I should ignore the shift register altogether. Either way, the PV would not update inside the loop as well. Could it be 'cause I'm streaming the PV from a UDP connection? If this is so, what would be the viable alternative to communicating between real time and the fpga mode?

Hi Neil, Have you ever had to stream data to some fpga vi via udp? I am having issues reading a streamed data to RIO on an fpga(pid) express vi. I used a local variable and tried a global variable as well to move the data over to the fpga vi while loop. In the while loop of the udp connection, I can read the data but not in the while loop of the fpga vi. The code itself is running on the RIO and the fact that the probe reads data in the scan engine loop tells me the integrity of the data I am streaming is not the issue. The png file is here. Looking forward to your reply.

Hey, I know this is a crosspost as well, but I will be glad to get help either way asap. I have a deadline for tomorrow morning. I am using the FPGA(PID) VI too. I ran into some issues lately. I am streaming the Process Variable over the internet via a udp connection. My manipulated variable is supposed to be the current that is being varied from the C/AO0 of the RIO FPGA functionality. Problem is when I run the program and I probe the global variables PV: Kinect Data and MV: Current (mA) in the top while loop, I can read the data. Not so in the PID Processing Loop. Can anyone tell me what I am missing?

It's fixed actuially. It wasn't a firewall issue. It was an IP address conflict issue. Sad thing is it took close to 10 hours to debug this.

Turned off, no luck. And this is done in Firewall tool?

I have a UDP connection setup on a Windows 7 machine that runs an IMAQ code. The machine can send and receive udp connection so long as data being sent it is on the same machine. When I send the code from a different process (running on Windows 7), I am able to read the data on the RIO udp receiver VI (running on the Windows Host) as well. So I changed the sending program to a labview code and the udp receiver won't pick up the data. Could there be something I am missing? Attached are the PNG files (lava1 is the talker (same as the Kinect Code VI) while lava2 is the receiver). Any clues would be appreciated. Kinect Code.vi

If you take a look at the subvi, where I am queueing data, you would see the FTP vi receives a certain data over a udp connection. I am sending data to this subvi from a different program. Trying to embed the subvi in the top vi works for the first 5 seconds or so and then it stops sensing the udp data. The loops are separated because I want to use the process data in a separate program. What exactly are you suggesting by your question, "What is the motivation for separating the loops"

I am trying to read the value of some data in a while loop from a sub-vi (attached as FTP WPF UDP below) into the top-level vi (attached as Proportional Controller VI) but I find that the data is timing out in my top-level vi whereas it runs smoothly withing the subvi. I have used the while loop and the timing in the subvi is synchronized to the external code that sends data via udp to the subvi. Is there a way you think this can be fixed? Below is my attached code. Thank you! Proportional Controller.vi FTB WPF UDP - Original.vi

Fixed.

Well, I made the change and still got no way around this. What exactly do you mean? I tried the home directory and the broken links are still there. RT Current Control.vi

Hi all, I am trying to log files to some tdms file in myRIO. I got the code setup in myRIO FPGA side and the RT vi (both attached below). I have the Real TIme code working but I can't seem to get the data-logging VI working (it tells me I have a lot of broken wires and methods not supported in target). Please take a look at the RT Current Control.vi code and see if there is something I am missing. Thank you! RT Current Control.vi Current Control.vi

I have fixed this. Here is my updated circuit design and the DAC control diagram

I am trying to drive a proportional solenoid valve: PVQ-33-5G-23-01N ( which responds to currents between 100mAand 165mA. I am using a circuit similar to the one in the attachment below except that I am using the myRIO's DAC in place of the AD5446, the LM324(http://www.ti.com/lit/ds/symlink/lm124-n.pdf) in place of the OP1177 and the MOSFET(http://www.mouser.com/Search/ProductDetail.aspx?R=VN3205N3-Gvirtualkey68900000virtualkey689-VN3205N3-G)[/url] So the challenge I am having is how to configure the circuit in labview. I am trying to use the default FPGA person ality of myRIO. I am supposed to generate a 1.2V Vref signal into the pin 3 of the LM324. By varying the word that is sent to the LM324, I am supposed to effectively vary the current on the Drain terminal of the mosfet. I have wired the Vref terminal to Connector C/AO0 on the myRIO and I have the VI below but I have no experience sending bits and bytes. I would love to drive the solenoid with about 10 -15 steps of current. Any help would be appreciated.