Accurate time stamp PCI-MIO-16E-1

Hello,
I need measure analogue signal which is acquired after rising edge on TRIG1 is detected. It works well, but time stamp of the waveform's beginning is not very accurate. So I want to ask you about possibilities to increase time precision, because I need repeat this measurement with cca 600Hz frequency.
I have interest about resolution which can be obtained. I use LabView 7.1.
Thank you for soon answer.
Martin Stefik

Yes, you understand correctly. Each trigger need own precise time information (hh/mm/ss/ms) or better.
But, I'm not sure that I can acquire both triggered input (let's say AI0) and continuous input (say AI2) on one PCI-MIO-16E-1 card. If it is possible, can you write example for me? This idea is good. I tried to do something similar. But, I'm new in with labview so it stayed without success
Thanks

Similar Messages

How to reduce reading and recording data time/ Visual C++, PCI 6024E and PCI-MIO-16E?

Right now I am working on a data communication programme. The time of reading digital signal and recording data is more than I expected, which is about 100 microsecond. I need to reduce the time. The software I am using is Visual C++ 6.0. I use two DAQ boards, which are PCI-6024E and PCI-MIO-16E. I have set the priority of Visual C++ to be realtime by task manager. The operating systme is Windows XP.
I am wondering how to set the interrupt of reading or writing data to be the highest and stop any other kind of interrupt.
Thanks in advance!

The primary limitation you will encounter when trying to do high speed
digital I/O using your E-Series hardware is that the digital lines are
all software timed. This means that for each and every digital
read it is necessary for your software to issue a command to your
hardware, read a single point, then receive the response from the
board. This prevents you from performing digital operations at
very high speed. In general, I would say that 100 microseconds is
a very good response using software-timed digital I/O on a Windows
computer.
It is difficult to make a good recommendation without more detail about
what you are trying to do. You may need to consider switching to
a Real-Time operating system, or upgrading your DAQ hardware to a board
that will allow you to time your digital acquisitions on the board
itself. These devices, such as the m-Series DAQ or the PCI-653x
series, would allow you to use hardware triggers for your digital
acquisitions, change detection, and buffered data acquisitions to
reduce the software overhead involved in a rapid acquisition.

Data acquisition and generation with PCI-MIO-16E-4 card help!!!!

Hello,
I'm using a PCI-MIO-16E-4 card with labview7 (in using DAQmx)and I
would like to draw a frequency response.
My problem is: my program can run correctly in low frequency but, it
can't work correctly in high frequency (after 2KHz the signal is
false).
For verifying my program: I only try to generate and acquire a sweep
sine. I constate after 2KHz the sine I read dosn't resemble to a sine
I wrote.
Can you say me where is the problem?
Thank you.
Le Trong Thao.

"Dr. Imad" wrote in message news:<[email protected]>...
> my understanding is that you are generating a sine wave (on one of the
> anlogoutput channels) and you are trying to read the signal.
> Since you can verify the signal at low frequency, but not at high
> frequency, it looks like you should increase the scan rate of the data
> acquistion (if you can, set it to 10 times the signal frequency)
> You can also use an oscilloscope to verify the signal is what you
> really generated.
Thank you for your response.
I've tried to do it, and I've tried several other possibilities but it
doesn't work correctly.
In fact, I think the problem is in my program. Do you have a program
that works correctly? I f
ound examples in the help but they don't run
correctly.
Le Trong Thao.

I am trying to generate a 50kHz sine wave for ten cycles, then aquire this waveform and store it in a file, I am using a PCI-Mio 16E-4 board, has anyone done anything like this?

I am trying to generate a 50kHz sine wave output on the DAQ card and then simultaneously recieve. I am using a PCI-Mio 16E-4 series board to do this. Has anyone done anything similar. I can generate a 50k wave no problem, and recieve one, but I can not get these vis to run together? Any suggestiosn

Jrod, yes you should be able to do this, actually there are quite a few example programs come with LabVIEW that handles simultaneous analog input and output, I check the specs of the board you use, the board should be able to handle the sampling/generation rate, but make sure for 50KHz sine wave, you would sample at least twice as fast, preferably ten times the generation rate, then this puts the sampling of the board to thew limit.
The program you can try is attached here, good luck with the application,
XD Gao
Applications Engineering,
National Instruments
Attachments:
Simul_AIAO_Buffer(E-series).vi ‏104 KB

How can I wire two PWM outputs of Accelerometer into PCI-MIO-16E boad with SC-2043-SG?

I have been using counter/timer pin since the accelerometer (ADXL202AE, Analog Device) provides about 550Hz PWM signal. The purpose of the project is:
- To acquire PWM signals with Full cycle(ms) and Posity duty cycle(ms) generated in Accelerometer.
- To convert the cycles into acceleration value.
By using counte/timer(GPCTR0_Source) and Trigger(Trig1) on SC-2043-SG board, the signal was obtained.
However, after converting the PWM signal to acceleration value and plotting with labview on-line, the sampling rate was pretty low (26-28samples/sec).
Then, I began to doubt that there is a wrong wire connection. Even though I am using one counter/timer pin, the sampling rate
was low. The purpose of using the acceleration was to obtain two output using two counter/timer pins.
Could anyone help me wire pins and solve the problem?
GINO.

Gino,
You should definitely be getting many more values in your buffer. You should actually be getting 500,000 values every second because a measurement is being taken for every pulse. I found a couple knowledgebases that describe error -10920 and how to remedy it. One is pasted below and the other can be found through the link.
But I'm not sure if you're going to be able to fix this problem because you're measuring pulses at a very high rate. What is happening is every time a pulse width measurement is taken it is put into an onboard (DAQ board) FIFO buffer that is 9 samples long. The computer then reads these samples out of the FIFO and into an a buffer that you can see in LabVIEW. I think the FIFO is filling up too fast and the computer is not able to read the data out fast enough. Therefore you are losing samples because they are being overwritten. This is all dependent on your system.
Here are some benchmarks for pulse measurements:
The following numbers were derived from a Gateway with 128 MB-RAM and an Athlon 700 for ONE counter of the PCI-6602. The number of counters you are using will affect these numbers.
Finite Buffer
Buff Period - 7.25 MHz
Buff Pulse Width - 7.25 MHz
Buff Semi-Period - 3.35 MHz
Continuous Buffer
Buff Period - 250 kHz
Buff Pulse Width - 250 kHz
Buff Semi-Period - 140 kHz
You should still be getting many more samples than 26 though. Try using this example with a very slow frequency pulse to make sure it operates correctly. Then start speeding up the pulse and determine when you get error -10920.
Here is an internal knowledgebase that may help you:
Title:
After Long Periods of Acquisition with AI and Counters, a -10920 Error Occurs
Problem:
A customer has a PCI-MIO-16E-4 and his application is acquiring analog input signals and performing event counting with the buffered event counting mode. The problem is that the buffered event counting is at some arbitrary amount of time (e.g., after 2 days) getting an error with the number -10920. The questions are:
1. Why is he getting this error?
2. Do you know how big the FIFO is for this buffered event counting?
3. When he shares a DMA channel with the floppy controller, how can we make sure they use separate DMA channels?
Solution :
Here are the answers to the above questions:
1. There is probably just some noise on the signal line coming in at some point. The STC is VERY sensitive, so if there is any fast glitching, it will attempt to transfer all of these. This can also happen if the signal does not ramp up fast enough, resulting in double-triggering in the middle region. Use a filter, or a Schmidt trigger*, to clean up the signals. Another suggestion is to use the PCI-6602 with filtering.
2. There is no FIFO used for the counters. The mMite has its own FIFO, but it is only about 9 samples long.
3. PCI does not "share" DMA channels. It may technically be the same DMA channel number, but this is just for reference. PCI cards use Bus Mastering. With Bus Mastering, the operating system gives up control of the PCI bus so that the hardware (in this case, our DAQ board) can handle its own data streaming, eliminating the extra step of having the OS monitor the transfers. The DMA channel numbers are just the "channels" that are supported by the mMite chip. You can have 3 PCI cards in the PC, each with DMA 1, 2, 3, and none of them will actually be sharing any resources.
And another knowledgebase about error -10920
http://digital.ni.com/public.nsf/websearch/8FB9091CB9BB452B8525642000554799?OpenDocument
Hopefully this all helps,
Erick D.
NI Applications Engineer

Buffer of PCI-MIO-16E-1 acquisition card

I am using a PCI-MIO-16E-1 acquisition card, and in the manual it says that it has a FIFO buffer of 512 samples. Is this the total buffer of my card? (I guess it should be larger). If I take more samples than can fit in the buffer in a single acquisition, what happens to the extra samples acquired? Are they stored in the computer memory?
Thank you

The PCI-MIO-16E-1 actually has a FIFO buffer size of 2048 samples. The hardware buffer size is not a limitation of how many samples you can read at a time. FIFOs are often used on DAQ devices to temporarily store incoming or outgoing data until that data can be read or written. For example, an analog input FIFO stores the results of A/D conversions until the data can be read into system memory.
So, the FIFO on the device will just hold the data temporarily until the computer can transfer the data to computer memory. FYI: When you programmatically set the buffer size in your application, you are setting the software buffer size in computer memory and that has nothing to do with the FIFO size. You don't have to worry about the FIFO within your program. I hope th
is helps.
Regards,
Todd D.
Applications Engineer
National Instruments

PCI-MIO-16E-4

PCI-MIO-16E-4をWin XPで使用しているのですが、ＸＰサポート終了に伴いWin7に買い換える予定でいます。
Win7で「PCI-MIO-16E-4」を使用できるものなのでしょうか？
また、使用できない場合は、代替のものはあるでしょうか？
それからソフトはLabVIEW5をeze化したものを使用しているのですが、そちらもWin7で対応可能かご教示下さい。
以上、申し訳御座いませんが、よろしくお願い致します。

Next time, you should post in english or in the forums section covering your mother language (as i and most others in the english section cannot read japanese)......
Nevertheless, as google translate works quite well (at least i got the point of your question) here an answer:
PCI-MIO-16E4 is a rather old device from the "E-Series" family. When trying to get information on "is this hardware still useable with Windows 7", you have to check if the hardware driver supporting that hardware is compatible to Win7.
That being said, you have to look for the most recent version of DAQmx to support that hardware. Good news is, that current versions of DAQmx do support this device, and they are supported on Win7.
So from the driver side, working with Win7 is possible.
Now the next step is to check for software compatibility.
And here we have two major issues, which will most likely prevent you from running the application without modification on Win7:
a) LabVIEW 5 is too old to support Win7 (i think, even XP wasnt supported officially, but i am not sure). So you can try to install it and it is possible that it will work. But if it doesn't work....well, its not working then.
b) As LabVIEW has no interface to DAQmx, i doubt that your application is using this driver to access the device. I assume that the application uses "DAQ". Most functionality of "DAQ" was ported to "traditional DAQ", so this should be compatible. But there is only a rather "limited" version of trad.DAQ for Win7 as you can see here.
Reading carefully question b), the recommended way to solve is to update the application to an uptodate version of LV including a change from NI DAQ to DAQmx (which requires some part of re-programming).
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

Question about setup_MITE in the PCI-MIO-16E-1

I have a quick question about setup_MITE in the PCI-MIO-16E-1. In one of the manuals, it states that if you're using Dell Optiplex GX series for our hardware configuration, is it true we need to re-write the MITE functions to correlate with the hardware? Please if you can clarify what this means, I would really appreciate it. Thank you in advance.

National Instruments is starting a new newsgroup to provide a forum for customers to discuss register level programming issues and ask questions. This newsgroup is not a direct support channel for register level programming, but may be monitored by National Instruments engineers. Please post you question with additional detail in:
natinst.public.daq.driver-development.general
Christian
Christian Loew, CLA
Principal Systems Engineer, National Instruments
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Pulse Train Generation using PCI-MIO-16E-4

I need to generate pulse trains of changing pulse widths using PCI-MIO-16E-4 daq card using Igor Pro.
I have tried to use the CTR functions (but always keep getting errors and it doesn't work). I also used the general purpose counters (GPCTR functions) but cannot visualise them on a CRO. If someone can help in regards to the programming aspect, it will be greatly appreciated.
Thanks
Vakul

Hi Vakul,
Some questions that might help me to get you a solution.
Are you using Traditional DAQ, or DAQmx and which versions are you using?
What operating system are you running?
When you say you can't visualize them on CRO, I assume that you are hooking the counter out to a cathode ray oscilloscope and can't see the pulse train?
Are you going to need more than two different pulse widths for your pulse train?
There are several online knowledge bases describing how to change the frequency of a pulse train on the fly.
This link explains how to use software to create a new pulse width.
http://digital.ni.com/public.nsf/websearch/7B1B0427C39FE33086256CEE00752133?OpenDocument
This link discusses using frequency shift keying, which will only allow you to have 2 different pulse widths.
http://digital.ni.com/public.nsf/websearch/EC1F089252F33B248625696E006FB6FC?OpenDocument
I assume that you are writing this program to compile in Igor Pro using C. I can help you with the C code development, but don't know anything about the Igor Pro API.
Please get back to me about those questions and let me know if you need further help.
Michael Denton

Is it possible to start a PCI4472 and a PCI-MIO-16E-1 simultaneously using an analog trigger (with pre-trigger)?

I would like to start several PCI 4472 and a PCI-MIO-16E-1 simultaneously. All boards are connected via a RTSI cable.
My program works fine if I use software trigger, or an analog trigger from a PCI4472 channel. However, the analog trigger works only when I set pre-trigger (or pre-scan) to 0.
Is it possible to start a PCI4472 and a PCI-MIO-16E-1 simultaneously using an analog trigger (with pre-trigger)?
Thanks.
Ian Ren

Hi, Bill
I think it is possible to set more than 38 pre-trigger scans on a single 4472 card. I've done this before. You can verify this by running the Labview example "Acquire N - Multi-Analog Hardware Trig.vi" which comes with LabView.
What I try to do but without success/luck so far is to start data acquisitions of several 4472 cards and a PCI-MIO-16E-1 card using an anlog trigger (with pre-trigger).
Thanks for your help.
Ian

I need a user manual for a PCI-MIO-16E-1 DAQ card

I am starting research using a PCI-MIO-16E-1 DAQ card that was used by a prior student and the manual is not available. I tried to access the manual online through your websitem, but I was denied access. How can I gain access to this manual so I can start to use this DAQ in my research?

What you need is the E Series help file. Here is the link, but for some reason if you can't get there, the zip file is attached.
-Alan A.
Attachments:
370503f.zip ‏1260 KB

Pins at a PCI MIO-16E-1 to Measure Frequency(DAQ-STC).vi?

I want to measure frequency with the
"Measure Frequency(DAQ-STC).vi".
Can't find the appropriate connector pins
in the manual of my PCI MIO-16E-1.
Can someone confirm or correct me?
Signal - PFI1/GPCTR1_SOURCE
SignalGND - PFI9/GPCTR0_GATE
PFI8/GPCTR0_SOURCE - PFI4/GPCTR1_GATE
Thanks in advance
Manfred

Manfred,
You can find this information by going to the http://www.ni.com/manuals site and viewing the E-series manual. There is a table which shows the pin number, name, and function for each pin.
Pin 10 - PFI1/Trig2
Pin 11 - PFI0/Trig1
Pin 43 - PFI2/Convert
Pin 42 - PFI3/GPCTR1_Source
Pin 41 - PFI4/GPCTR1_Gate
Pin 40 - GPCTR1_out
Pin 6 - PFI5/Update
Pin 5 - PFI6/WFTRIG
Pin 3 - PFI9/GPCTR0_Gate
Pin 2 - GPCTR0_Out
Pin 4,39,35,36 - DGND
Mark

Can I use multiple PCI-MIO-16E-1 cards under NT 4.0 SR3, LV 5.1, & NI-DAQ 6.5.1?

We have not been able to run multiple AT-MIO-16E-3 cards with NT 4.0, because (partly) the cards & NT are not PNP. Will changing to the PCI-MIO-16E-1 &/or PCI-6071E (64 channel version) allow us to simultaneously run multiple (same type) MIO cards on the same computer? We want to use one card to interface to SCXI, & it appears that the PCI version uses the same cables/connectors as the AT series.

Hello;
The PCI version of the e-series boards have pretty much the same features of the ISA version, the only difference is the bus.
So, you should be able to use the same acessories as you use with the AT boards.
Anyway, you can still try to install the AT boards with NT. The following link is a good step by step installation guide with some troubleshooting hints also. You just need to select the board and OS you are working at.
http://www.ni.com/support/daq/
Hope this helps.
Filipe

How is to set the input range of PCI-MIO-16E-1 (6070E) to be 0 to +5V?

How is to set the input range of PCI-MIO-16E-1 (6070E) to be 0 to +5V? Thank you very much.

Hi x2am,
Here is a link to a document about setting input range limits.
DAQ Input Limits
Hope this helps!
Jeremy L.
National Instruments
Jeremy L.
National Instruments

Possible sampling rates of a PCI-MIO-16E-1 with DASYLab

Hello!
I'm using a PCI-MIO-16E-1 DAQ. It's maximum sample rate is 1.25MS/s
My questions:
- What does maximum output rate of 1MS/s mean? I need 3 channels at 400kS/s.
- What are the possible sample rates? Can I use e.g. 3 channels with 105 kS/s each?
- If not what are the fixed sample rates of that card?
Thanks a lot

Hi matadler,
The E-Series boards have one DAC for each output, therefore you can use the full output rate with all output channels.
The PCI-6070 (formerly known as PCI-MIO-16E-1) has 2 analog outputs, which can be used at up to 1 MS/s. If you need more analog outputs, you need another board.
Analog inputs on the E-Series boards are multiplexed. This means you have only one ADC which is used for all analog input channels. You have to divide the maximum sampling rate by the number of channels you actually use.
For your application, this means you can use up to 416kS/s with 3 channels. There are no fixed sample rates on the board, so it's no problem to use 105kS/S.
Regards,
Richard H.
National Instruments

Accurate time stamp PCI-MIO-16E-1

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