Using field points how the dc voltage measuremen​t is done?

i am new to labVIEW..  Using cFP-AI 100  i am trying to measure a dc voltage [5volts].. all the field point items are configured on MAX. when the example VI provided runs there is error indicating that the connection is broken or network module is not pwered on.. but i have checked both .. What may be the problem?

Hi ELUE,
When you say "all the FP items are configured on MAX," does that mean you can see and connect to the device? Can you take readings in MAX from the FieldPoint module I/O menu under the Data Neighborhood?
If you're able to read from the I/O menu you are probably using the default I/O point in the example. It's usually necessary to choose the I/O point before running the example.
Cheers.
| Michael K | Project Manager | LabVIEW R&D | National Instruments |

Similar Messages

  • Using field points how the dc voltage measurement is done?

    i am new to labVIEW.. Using cFP-AI 100 i am trying to measure a dc voltage [5volts].. all the field point channels are configured on MAX. when the example VI provided runs with the proper i/o point is selected] there is error indicating that the connection is broken or network module is not pwered on.. but i have checked both .. What may be the problem?

    Hi ELUE,
    Could you please let me know if the status LED (or any other LEDs are blinking) in a particular pattern on your fieldpoint controller? Also, could you please let me know what controller you are using and if you get a particular error code? Thanks!
    Best regards,
    Steven

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    Is wish to connect a Vibrating Wire Strain Gauge using Field Point.
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    What sort of resolution is needed on the frequency sweeping? There are currently four FieldPoint modules that can be used for generating pulsed outputs; the FP-CTR-500, FP-CTR-502, FP-PWM-520 and FP-PG-522. For the remained of this posting, I will use FP-CTR-50X to represent both the FP-CTR-500 and FP-CTR-502 as they are identical in functionality, different in their input/output stages.
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    The FP-PG-522 is a Pulse Generator module that can operate in an continuous pulse mode. The On Time, Off Time and resolution (time base) are adjustable. The smallest time base is 100 ms, for a maximum output frequency of 5 kHz. Like the FP-PWM-520, the FP-PG-522 adjusts it's output rates by changing the time rather than the frequncy, making it difficult to smoothly sweep across frequencies.
    Finally, the FP-CTR-50X modules may be used. The FP-CTR-50X modules have 8 16 bit counters, 4 Gates and 4 outputs. The module has two internal clocks, 1 kHz ad 32 kHz that can be used to feed the counters. The outputs can be configured to toggle each time an adjustable terminal count is reached, allowing output pulse generation of up to 16 kHz (32 kHz internal clock divided by 2). The FP-CTR-50X modules have the advantage over the above modules in that the counters can be cascaded and set for differing terminal counts allowing multiple pre-scalers which may allow better resolution of generated frequncies.
    For measuring the output frequency generated by the gauge, the only current modules that will allow you to directly measure the output are the FP-CTR-50X modules. However, as they were primarily designed for event counting, it takes a little bit of extra programming to allow them to be used to measure frequencies. The effectiveness of frequency measurement on the FP-CTR-50X modules varies on the sampling period, the programming and the network module. There are several KnowledgeBase and Developer Exchange articles talking about how to use a FP-CTR-50X module to measure frequencies, so I will not duplicate the information in this post.
    Regards,
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  • Can I collect the pulse data using Field Point?

    I have a water flow meter, which outputs pulses. I use a counter to connect it and read the data. Now, I want to read and save the data in the computer using LabView and Field Point. I think this can be done if I can collect the number of pulse. I am wondering how to do that.
    Thanks.

    Dear Zl,
    Counting pulses is much easier with the FP-QUAD-510 or FP-CTR-500, but can be done with the FP-AI-110.  You can't directly count the pulses with a FP-AI-110, but you can do it in software. Bring in the data by doing a normal read. Then, using shift registers, if the previous voltage is less than .8V (low) and the current voltage is more than 2.5 (high), increase the pulse count. I have attached a program that shows what to do with the data once you bring it in. I took the data from an array outside the while loop, but your data will be brought in one point at a time inside the while loop. One thing to take note of, since Fieldpoint brings in data at 1 kS/s, this will only work with pulses slower than 500 Hz. The farther the duty cycle is away from 50% duty cycle, the slower the signal must be in order to catch the pulses correctly. Please let me know if you have any questions. Have a great day!
    Sincerely,
    Marni
    PS- Please only post question once.
    Attachments:
    pulsecount.vi ‏22 KB

  • I have a FP-1600 and a FP-AO-200 module, 0-20 ma. When I use Field Point Explorer 3.0.1, I can not command any of the channel output current. The current remains in the lowest value 0.0035 A. What is the problem ?

    I have a FP-1600 and a FP-AO-200 module, 0-20 ma. When I use Field Point Explorer 3.0.1, I can not command any of the channel output current. The current remains in the lowest value 0.0035 A. What is the problem ? The communications with the module are OK, because it shows when the current are open or closed.

    Jorg,
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    Michael Shasteen
    Applications Engineering
    National Instruments
    www.ni.com/ask
    1-866-ASK-MY-NI

  • Tips on transferring LV executable that uses Field Point Serial to another PC

    I have been trying to transfer an LabVIEW compiled executable  from one PC to another
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    This means I may have to install yet another version of LabVIEw to get the exe to work again and its getting tiresome.
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    My next move is to upgrade the target to 2010 SP1 and try again but it has already taken me days to transfer this one program
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    I have been to these KnowledgeBase links and what is so frustrating about it is that I have have not seen anything that was not already done
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    The EXE is now partially working (somehow) but I am trying to find out the exact procedure for next time so I can write it down for future reference..
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    Your knowledge base insists that if the field point versions are the same on both machines and if the DLL is where it is supposed to be and if the IAK file is loaded and saved
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    Attachments:
    ni-FP-error.GIF ‏16 KB

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    Sanaa T.
    National Instruments France
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