Hi Folks,
I'm trying to figure out how to create pulses on a digital output line on my PXIe-6535. I'm painfully new to this sort of thing. I'm trying to figure out how to do this programmatically via python using ni-daqmx. I need to be able to control the frequency of the pulse to within a msec...
Can someone point me in the right direction?
Thanks!
Hi,
I have an assumption that BNC-2115 provides 24 digital I/O via BNC connectors P0.(0..7), P1.(0..7) and P2.(0..7). Is this correct?
Hi,
I need to use a digital channel as start trigger for logging using Vi Logger 1.1.1.
I define a digital channel as indicated, but it does not appears in Task attribute for "Logging conditions" on the list box "Digital channel name". It appears "<No configured channels>". The channel does not appear as Virtual Channel either. Is it a bug of this version? or What I have to do?
I know Vi Logger is a very old one application, but my hardware works with it only.
Could some help me please?
Alberti
Hey,
I am looking at the connector pin out for the NI6528 and the recommended cable SH100-100-F and they do not match up. The connector on the board looks to be grouped by pairs, ie 1 and 2, 3 and 4, and so on. The cable is paired in 2's as well, but the twisted pair's are 1 and 51, 2 and 52, and so on. This seems to indicate that the differential pairs are separated and not together like they should be. How big of a problem is this if the cable is only 1 meter in length? Should I look for/design my own cable, or can this still work, or am I missing something simple and silly?
Hello.
I am trying to monitor a digital pulse that is infrequent and is ~100ms in duration. My system polls the input and will sometimes miss the pulse. I have been unable to find a method to use this input as an interrupt so that I do not miss it. My hardware is a cDAQ-9178 chassis and either a NI-9401 or NI-9403 DIO module.
Reason that I am missing the pulse is that I am also using a NI-9217 RTD module and reading all four channels in high-resolution mode takes ~800ms. During the NI-9217 read the pulse often occurs and is missed.
Is there a simple method to switch from polling this digital input to an interrupt?
Thanks
Dan
Hello,
I would like some assistance with figuring out how to connect an encoder output from a servo driver to the USB 6001. The servo driver says that the encoder outputs are labeled as A, /A, B, /B, and Z, /Z. From my understanding, these are differential digital outputs that need to be connected in pairs (so that for example, A and /A must be connected to an IO pin of their own). I'm also assuming that the Z and /Z isn't necessary, based on what I've read about how it's mainly used for precision.
Will the USB 6001 be able to accommodate this setup? The goal is to take the signal from the encoder output and process the data in LabVIEW to determine the angle/position of the motor.
Attached is the servo driver that we plan on using. It has a built in encoder capability. The outputs of the encoder are in the X1 port.
We are looking at possibly purchasing a couple of USB-6501 modules for our test stations. I have a few questions that I have not found a definite answer for. I would appreciate it if someone could provide the info.
1. I read a post somewhere along the way that seemed to indicate that when a port is configured as a driven output, the output voltage could be software configured to either 3.3 or 5 volts. Is this correct?
2. The manuals indicate that there is a weak pull up on the input of the ports. What is the resistance value of the pull up?
3. Is the voltage for the input pull up configurable or is it a fixed voltage? What is the voltage(s)?
TIA,
Charlie
This is my second time encountering this issue with an NI USB DAQ (previously with a USB-6008 or 6009 if I recall correctly) device, so I figured I'd get opinions, maybe I'm off base and this is normal. I recently bought an NI USB-6501 because of it's claim to implement digital outputs which can optionally be set as Open Collector. However, the outputs are not strictly Open Collector, as they already have an internal pullup resistor to 5V.
A bit of quick research indicates this practice of installing pullup resistors on Open Collector outputs is not entirely rare, but why? The entire point of an open collector output is to allow me to select the pullup resistor value and the voltage to which it is pulled to, so by installing a 4.7k pullup to 5V, internally, the extent to which this output can be used has been limited.
My use case was to drive an HP RF switch which required the grounding of a selected lead in order to select which RF channel was to be switched through, and all other lines are to be left floating (and presumably be pulled up to +24V internally, inside the RF switch). I recall it didn't work and I had to use a relay board instead (this 4.7k pullup to +5V was likely not allowing the logic line to reach a high enough level to be interpreted as a logic high, inside the RF switch).
So I guess my question is, why is an open collector output implemented with a pullup resistor already implemented? Does NI have any module which does not have a pullup, or one which can optionally be disconnected?
I have been trying to figure out if there is a way to use my PCI 6537B as an I2C master. I tried searching online but I could not find an I2C controller in the PCI or relevent ways in which I could use the on board peripherals to mimic an I2C. So is it possible to have my 6537B as an I2C master ?? I plan to use Labview to control the device. Any suggestion or feedback is welcome.
Hi all, I am a new developer on PCI4070 and labview, now I want to read the code from the channels(voltage and current) on PCI-4070 to my labview vi and do some calculation and display. Can anyone give me a sample code as time is limited and some documents are hard to identity for the suitable scenario. Thanks~
Hello all,
I want my PCIe 6535b NI card to work as a master device so that during continuous digital output it can also output trigger signal to other devices. I want the card to send out trigger signal every N scan. For example, after every 10 digital output from 32 lines, I hope I can get 1 trigger pulse from PFI3. I have been struggling to achieve this for quite a long time. Please help me out!
I'd like to provide more details about my problems. I developed my own code based on the sample code "Digital (Pipelined sample clock) - Continuous Output.vi". Firstly, I tried to use the sample clock (output from PFI4) as the trigger signal. However, I notice that the sample clock is always there even I stop the program or kill LabVIEW. Why is it like this? Are there some configurations that I can set the sample clock output to 0 when I hit "Stop" button in my program? Or how can I copy the sample clock to another line ( e.g. PFI3) to export it within the "while loop".
Any help would be appreciated !!!
Thanks you in advance.
Best regards,
David
Hello,
For the change detection function in PCIE-6509 /USB or similar, the manual indicates that:
When an input change occurs, the NI USB-6509 generates an interrupt, and the NI-DAQ driver then notifies the software.
I suppose we can consider the hardware interrupt generates super fast as it's ASIC based. But what is the possible time range that it gone through the driver and hit user's software ?(e.g a C#.NET software in low CPU load) . Is 1us level reasonable? Thanks.
Hello,
I am trying to generate and acquire data between channels on PXI-6551 card. I am using the demo VI "Dynamic Generation and Acquisition-Source Synchronous". I am able to generate waveforms ( I can see on scope) but can't acquire anything. I connected PFI1 to PFI2 and CLK OUT to STROBE as mentioned in the instructions. I connected DIO0 to DIO8 and DIO7 to DIO15 but I only receive zeros.
Anything that I could be missing ?
Thanks,
Mayank
I need some help, where I can find the driver for NI 9403 series C?
Hi,
Im trying to track down a datasheet for an old NI PCI CAN card I have see images attached. Im trying to find what versions of windows its compatible with.
Thanks in advance
Anthony
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What is the maximum achieveable throughput speed with the NI 6509?
I need to output 50 bits of data every 500nanoseconds. Spec states 10MHz clock (100nsec)
an example LV will.
Note: Please let me know if this would belong better in another community and I will repost it there.
I work in a research lab that requires a pyrometer to do non-contact temperature measurement of silicon chips that are heated by halogen lamps. Presently, we use thermocouples to read the temperature and then do closed-loop feedback to either turn the lamps on/off based on the heating trends that we desire. The issue with using the pyrometer (Model here: http://www.optris.com/optris-cslaser-lt and the manuals are in the "Datasheets and manuals" tab) is that the software provided by the manufacturer just records the data into a text file after the test is run and doesn't allow for real-time integration with LabVIEW. There is a connector that plugs into the back of the pyrometer and has wires with the following designation:
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Then there is a further USB adapter that we bought in order to communicate with the pyrometer on the computer. This is the connection diagram:
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I'm new to LabVIEW - is there a way to get the temperature data (which I assume is coming from TXD, the yellow wire) into LabVIEW? Could I use a Compact DAQ on the digital side and plug the TXD wire into one of the channels to receive data? Or is there a way to still use the USB? Thank you so much for any help.
Hi I need to replace a Twido module but there are no part number on the module(attached picture) anyone can help find this part...?
Thanks!
can i read the voltage and amperage with ni 9203, ni 9205 in solar panel?