Real-Time Measurement and Control | Forum profile

Here is the attachment :-)     While loop timing.png (26 kb)

Here is project with time violations.Sorry that I didn't send it in one file but I can't use rar package as an attachment.   I'm using LV 2009 and PCI-7831R with Virtex 2.   e.lvproj (13 kb) e.vi (39 kb) inercyjny 1 rzedu (SubVI).vi (16 kb)

Hi there,   A simple one:   I have a RT application where I transfer small amounts of data (around 1Kb) between 5 FPGAs (7813R) and a microprocessor (8106RT) at high speed (2KHz). The data is used to implement a closed loop control system, so I really ned new data available in the uP each 500us. Ideally for the stability of my system I would need to do all the reading, processing and otputs writting in less than 100us.   DMA FIFOS...

Merci pour votre réponse. A force de chercher et de faire plusieurs manips sur mon programme LabView, j'ai fini par le résoudre en début d'après-midi. Je dois avouer que je ne suis pas sûre de savoir précisément d'où venait le problème...

new NI-RIO driver 3.3.0 RTf2 Patch released   - check if  the bug still exists

Sorted! Thanks to a posting here http://forums.ni.com/ni/board/message?board.id=170&message.id=384602&query.id=1047536#M384602  by Wayne.C   his vi at http://forums.ni.com/ni/attachments/ni/170/385182/1/Alternate%20MB%20CRC-16.vi  did the trick. Replaced the table in this vi with the one generated from my code posted earlier and removed the swap Bytes on output of For loop and bingo!!   Many thanks to all who posted info...

Awesome. Best of luck in your application.  

A common issue with laptops is that they use the primary network card(almost always wireless) to detect the cRIO through Measurement & Automation explorer. If the bridged does not work, try disabling your wireless and try again. If this allows you to detect the cRIO, then you should go to control panel->network devices->advanced->Advanced settings and reorder your network devices to have your wired connection at...

That community example was just posted by the support engineer that I am currently working with .   I have looked at that knowledge base article but unfortunately the sampling delay offset is not consistent from one run to the next . The   variation in the timing is shown on the scatter plot from my OP .   I am just using cDaq running labview on WinXP . I figured some of the people with real-time experience may have had better knowledge of...

Sorry if i was not clear...By hang, i mean sometimes a total crash (no more tcp, web server and application stopped), sometimes just the network stopped, and the application recover when i close all networked tasks. It happens whenever i launch the remote panel first, or the data logging STM connection first. Looking at the processor load with the distributed system manager, i saw that my application alone shows only 25%. So i don't...