Utilisation de PFI0 NI-6541

Bonjour,
J'utilise actuellement une carte NI-PXI-6541 et j'ai besoin de me déclencher sur plusieurs triggers.
La 6541 en possède 4, cependant le PFI0 se trouve en façade et non sur le cable C68-C68-D4.
Pour des raisons techniques je ne peux pas utiliser la prise en façace, mais j'ai remarqué que le signal PFI0 passe quand même à travers le cable par le biais d'une pin "reserved".
Malheureusement, je n'arrive pas à exploiter ce signal (celui venant du cable) à l'aide de la librairie HSDIO de Labview.
D'où ma question : y a-t-il un paramétrage particulier à faire pour préciser que je souhaite utiliser le signal PFI0 provenant du cable et non de la prise en façade ? Ou bien est-ce tout bonnement impossible ?
Merci d'avance,

Bonjour PI18-Paul,
D'après le manuel, il semble bien que la PFI0 n'est disponible qu'en facade de la carte alors que PFI 1,2&3 sont accessible depuis le connecteur DDC.
Avez-vous besoin des 4 PFI ou bien 3 vous suffissent?
Bonne journée,
Flo
Open Diagram First

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RGA,
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Hi All,
I am using LabVIEW 7.0 and DAQmx to configure a 6062E-Daq Card. I am
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They key to everything is to store the most recent data in a software
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It's slightly complicated, but with a little work you can get it to
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Regards,
Otis
Training and Certification
Product Support Engineer
National Instruments
Attachments:
DAQmx-ReadFromCircularBuffer.llb ‏209 KB

How can i capture 6 differential analog in lines using PFI0 as a clock?

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Hello,
I am somewhat new to NI-Scope. I have a 5122 card and would like to output a single TTL pulse on either PFI0 or PFI1. I don't want it to be triggered or anything. Basically, on my front panel I'll have a button that says "Pulse" and when I press it the appropriate PFI will output the single pulse. I've tried using NIScope Export Signal.vi but can't seem to get it to work.
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Solved!
Go to Solution.

Mike,
Thanks for letting me know about the single pulse problem. Unfortunately, a pulse train won't work for my application. Let me explain a little more what I need to do.
I have a 5122 card and I would like to acquire data continuously. There will be a button on my front panel that will say Acquire Data and when I press it the card will start taking data. My data generation will need to begin with the acquisition, which is why I need the pulse. The data generation board is configured to begin its sequence of data generation whenever it receives a trigger signal, so if I use the Probe Compensation vi's at 1kHz then my data will keep starting over until I call the Stop vi. So, this pulse that I need will do two things - trigger my data generation and also trigger my data acquisition. The data acquisition will stop when I press a Stop Acquisition button.
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Using PFI0 as a trigger and PFI1 as an input on PCI-5114

Hi,
I have a NI-5114, and I'm currently using PFI0 as the trigger, and reading out the two analog channels. I'd like to add a second digital input through the other PFI so I can simply test if something is on or off (already a digital signal). So, when PFI0 triggers, it digitizes the two inputs and reads whether or not PFI1 is on or off (no timing necessary). Is there a trick to get this done?
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Hello Karl,
Since the PFI lines are generally used as triggers, we cannot read a PFI line unless you are specifically triggering off it. What you could do is as soon as you receive a trigger you can export a trigger of PFI1 which you could connect to one input of an external AND gate and second one is the signal you want to monitor. or can use another DIO DAQ device like USB-6501 to monitor the status of external digital signal.
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I am using PXI 6541 for data acquisition from an electronic card. Electronic card generates an interrupt signal and PXI acquire data when it gets interrupt signal. The interrupt signal is generated 1 KHz. But using my windows XP, I cannot acquire data on this high rate. The highest rate that I can acquire data is 50 Hz. If I want to acquire data with 1 K Hz, from electronic card using PXI 6541 and using Windows XP, What Should I do.

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Using PXI 6541 in real time applications

Hi,
I want to use PXI 6541 in real time mood, can it be used in real time applications.

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Dale

Hello Dale,
It is hard to tell if will definitively damage the digital circuitry of the 6682, however I it is not advisable to test this.
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Christian A
National Instruments
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Anyone seen error codes -1074116171 / -1074118618 using 6541

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Ian,
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-Ryan
Message Edited by Ryan M on 03-14-2006 09:00 AM

[845 Series] MS-6541

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Hi,
look into Help!
AI Start needs on "analog chan and level" the string "PFI0" to use PFI0 for analog trigger input. In the example it is the control "trigger channel".
Unfortunatly the help is not complete. "analog chan and level" is a cluster of two elements, the channel name and the level. The level is not explained in help.
Waldemar
Waldemar
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I'm acquiring an analog signal on my PCI 6250, triggered on PFI0. For this test, I use DAQ Assistant
I use VS2010, MS2013, DAQmx 14.0 .
I acquire at 1MHz, 5,000,000 of samples (5 seconds)
I would like to plot on a Digital Graph my PFI0 signal, which shows on horizontal axis Date Time. I would like also to know if it possible to record the DateTime of each Rising edge detected (Rising edge period on PFI0 may be faster than 5s) in parallel of my Analog Acquisition or at least the DateTime of the rising edge which has triggered the Analog acquisition.
Kind Regards,

Hello Charly,
Yes you could start 2 differents tasks, one analog aquisition to plot your signal and at the same time one numeric like a counter to mesure your rising edges.
Hope this will help you,
Kind regards,
Maxime G. | Application Engineer
National Instruments France
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Analog trigger with NI9205 PFI0

I have a problem to trigger an analog acquire with NI9205 (C module in Compact DAQ)
i use the PFI0 line, but the acquire don't start when i send a trigger gignal (5 to 0V)
the error:
could you help me?
Thanks a lot!

You set your task up to run at a rate of 2400 samples per second, and request 64 samples to be read. This means that it will take at least 37.5ms to take the data.
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Bonjour,
Je cherche à utiliser un déclenchement externe numérique pour les cartes 6009, 9205 et 9401. J'envoi sur chacune de ces cartes un palier montant de tension de 5V (entre COM et PFI0).
Cela fonctionne pour ma 9401 mais pas pour mes trois 6009 et la 9205. En y regardant de plus près, je me suis aperçu que la tension entre le COM des cartes et l'entrée PFI0 était ~5V donc bloqué en état haut, alors que la meme mesure de tension sur la 9401 est de 0V donc état bas.
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Résolu !
Accéder à la solution.

Bonjour GabN,
Vos carte 6009 et 9205 sont en mode "collecteur ouvert" :
Page wikipedia qui pourra vous aider à mieux comprendre : Collecteur Ouvert
Spécifications de l'USB 6009 : NI USB-6009 , voir page 19/31.
Les E/S sont, en plus d'être en collecteur ouvert, connectées en interne au +5V, c'est donc normal qu'elles soient à 5V lorsque vous les mesurez car le courant est d'environ 0mA.
En espérant avoir répondu à votre question.
Bien cordialement,
Jérôme Henrion | NIF - Application Engineer | PXI Captain
Certified LabVIEW Developer

Utilisatio​n de PFI0 NI-6541

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Utilisation de PFI0 NI-6541