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Digital I/O | Forum profile
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Forum profile page for Digital I/O on http://www.ni.com.
This report page is the aggregated overview from a single forum: Digital I/O, located on the Message Board at http://www.ni.com.
This forum profile page summarizes the general forum statistics such as: Users Activity, Forum Activity, and Top Authors, which are reported in either a table or graph below for a given reporting time period.
Additional forum profile information for "Digital I/O" on the Message Board at http://www.ni.com is also shown in the following ways:
1) Latest Active Threads
2) Hot Threads for Last Week
Warning: These statistics are generated using 'best efforts' and can experience delays and reporting errors at times. Please note that such statistics do not constitute a forum's popularity and/or exact posting volumes at any given reporting period.
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Posting activity on Digital I/O:
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Digital I/O Posting activity graph:
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Top authors during last week:
user's latest post:
DAQmxSetDOTristate is slow -...
Published (2009-11-26 07:38:00)
I have found one more strange thing which I believe relates to this problem. The DAQmxWaitUntilTaskDone function does not work. Specifying timeout=-1 and the function will never return. Specifying timeout=0 and I get an error. I have tried all the C examples and I get the same result. Calling DAQmxWaitUntilTaskDone with timeout=0 gives the following error: Wait Until Done did not indicate that the task was done within the specified...
user's latest post:
Checking an input connected to...
Published (2009-11-27 11:16:00)
Assuming that it's a TTL signal, you just need a single DAQmx Read set for single sample Boolean and wire the output to your while loop's termination terminal. A DAQ Assistant set for the same would work as well.
user's latest post:
Bidirectional digital I/O with...
Published (2009-11-27 09:02:00)
Hi, I am a NIDAQmx novice and need some help for the following task: I need to rewrite a piece of C-code (that uses routines presumably from NIDAQ.DLL) in LabVIEW (8.5 or higher) using NIDAQmx VIs. The hardware is a PCI-6503 card, and the port0 of that card is to be used in bidirectional mode. The following code fragment lists the bare functions as they are used in the C-code (I removed all error checking and query-for-ready calls): ...
user's latest post:
TTL signal to high-speed relay....
Published (2009-11-22 17:24:00)
Got a bunch of NTE stuff and put something together, works great. Delete thread if needed.
user's latest post:
Need help programming SEALEVEL...
Published (2009-11-24 14:08:00)
Ok Sorry for the Delay Finally together with Sealevel, I finally have a complete program. There were several things that were wrong. 1. With the new version of NI MAX installed all my driver information was deleted. Which anyways resulted in me not needing it for this driver. 2. My fprogram was working correctly, but since I was using the wrong driver the software could not read or see the hardware. 3. Error check on the software created a...
user's latest post:
TTL signal to high-speed relay....
Published (2009-11-20 13:41:00)
Building on KC's suggestion, optical isolation and surge suppression may be wise to add. A solid state relay would be another device to use. -AK2DM
user's latest post:
Correlation between PCMCIA pins...
Published (2009-11-20 11:04:00)
Unfortunately our schematics are proprietary information. If you return your card for repairs however they will check into this for you.
user's latest post:
how to use dma mode in hsdio? -...
Published (2009-11-23 03:32:00)
i use the pci6542 to fetch the data,i want to speed up the speed of the data from the on board memory to pc memory,the no of the data more than 1m,every record,and i want to know how to use the multimode vi fetchform in the mode of dma?thx very much.
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Latest active threads on Digital I/O::
Started 4 days, 11 hours ago (2009-11-27 11:16:00)
by Dennis Knutson
Assuming that it's a TTL signal, you just need a single DAQmx Read set for single sample Boolean and wire the output to your while loop's termination terminal. A DAQ Assistant set for the same would work as well.
Started 2 months, 4 weeks ago (2009-09-04 17:53:00)
by John P
Hi RytisJ, The post you quoted sounds quite familiar... Unfortunately, as I mentioned in the other thread the 621x boards do not support Correlated Digital I/O, hence the error you are seeing. Since you only need 2 lines of outputs, you will be able to generate the pulses with the counters, but updates to the frequency and duty cycle will be software-timed and non ...
Started 6 days, 8 hours ago (2009-11-25 14:32:00)
by DJ L.
Hey Tomas, What hardware are you using? I am going to assume that you are using either a 6533 or 6534, since the 6535/6/7's do not work with the Traditional DAQ driver. Or are you using some other DAQ device, like a 62xx? Also, I am curious as to how you had your device configured/programmed when you had the I2C communication working before? One method you can consider is to ...
Started 1 week, 4 days ago (2009-11-20 02:06:00)
by K C
Just use a MosFet as a switch.
Started 6 days, 14 hours ago (2009-11-25 08:43:00)
by Dennis Knutson
Started 1 week ago (2009-11-24 16:12:00)
by Seth B.
In order to program for this device, you will need the NI-DAQmx driver installed. This driver works with both the evaluation version of LabVIEW and the full version. If you are using LabVIEW 8.2 or later, you can use the latest NI-DAQmx version: 9.0.2 . You will not be able to directly control the hardware in the desktop using your laptop. If you would like to develop on your ...
Started 2 weeks, 5 days ago (2009-11-12 18:50:00)
by ColeTrain
Hello Ingenibro, This sounds like you are trying to interface with a .dll which is more of a LabVIEW issue than a hardware issue. I am not sure that this forum is the best location to get the help you need. I am guessing that 1. The LabVIEW forum might find you more help and 2. that the error you are seeing is because you a passing a bad parameter to your .dll. Please make sure ...
Started 1 week, 1 day ago (2009-11-23 09:27:00)
by Dennis Knutson
You can write all 24 pins at the same time and the 6501 response will be fine but your os will introduce quite a bit of jitter (10's to 100's of ms). Using a card with hardware timed digital I/O would be the simplest way to ensure your timing.
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Hot threads for last week on Digital I/O::
Started 6 days, 8 hours ago (2009-11-25 14:32:00)
by DJ L.
Hey Tomas, What hardware are you using? I am going to assume that you are using either a 6533 or 6534, since the 6535/6/7's do not work with the Traditional DAQ driver. Or are you using some other DAQ device, like a 62xx? Also, I am curious as to how you had your device configured/programmed when you had the I2C communication working before? One method you can consider is to ...
Started 1 week, 1 day ago (2009-11-23 09:27:00)
by Dennis Knutson
You can write all 24 pins at the same time and the 6501 response will be fine but your os will introduce quite a bit of jitter (10's to 100's of ms). Using a card with hardware timed digital I/O would be the simplest way to ensure your timing.
Started 2 weeks, 5 days ago (2009-11-12 18:50:00)
by ColeTrain
Hello Ingenibro, This sounds like you are trying to interface with a .dll which is more of a LabVIEW issue than a hardware issue. I am not sure that this forum is the best location to get the help you need. I am guessing that 1. The LabVIEW forum might find you more help and 2. that the error you are seeing is because you a passing a bad parameter to your .dll. Please make sure ...
Started 1 week ago (2009-11-24 16:12:00)
by Seth B.
In order to program for this device, you will need the NI-DAQmx driver installed. This driver works with both the evaluation version of LabVIEW and the full version. If you are using LabVIEW 8.2 or later, you can use the latest NI-DAQmx version: 9.0.2 . You will not be able to directly control the hardware in the desktop using your laptop. If you would like to develop on your ...
Started 6 days, 14 hours ago (2009-11-25 08:43:00)
by Dennis Knutson
Started 4 days, 11 hours ago (2009-11-27 11:16:00)
by Dennis Knutson
Assuming that it's a TTL signal, you just need a single DAQmx Read set for single sample Boolean and wire the output to your while loop's termination terminal. A DAQ Assistant set for the same would work as well.
Started 2 months, 4 weeks ago (2009-09-04 17:53:00)
by John P
Hi RytisJ, The post you quoted sounds quite familiar... Unfortunately, as I mentioned in the other thread the 621x boards do not support Correlated Digital I/O, hence the error you are seeing. Since you only need 2 lines of outputs, you will be able to generate the pulses with the counters, but updates to the frequency and duty cycle will be software-timed and non ...
Started 1 week, 4 days ago (2009-11-20 02:06:00)
by K C
Just use a MosFet as a switch.
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