the cDAQ-9188 discovery method?

Similar Questions

• How many quadrature encoders may be read together with the cDAQ-9188 chassis?

  We will record position periodically 8 engines (at the same time as we are to the corresponding samples entered analog).  It seems that the 4 built-in counters limited chassis to 4 encoders.  Is this correct?  I am familiar with modules of counter PLC which manage high-speed counting, and then the CPU posts periodically to update the total values.  This is how the NI 9401 card would work?

  Hi jtrout,

  You are right the 4 built-in counters than the cDAQ-9188 chassis 4 encoders.  The following article deals with the use of the NI 9401 card for encoder measures: http://www.ni.com/tutorial/7109/en/.

• buffer size and sync with the cDAQ 9188 problems and Visual Basic

  Hi all, I have a cDAQ-9188 with 9235 for quarter bridge straing caliber acquisition module.

  I would appreciate help to understand how synchronization and buffer.

  I do not use LabView: I'm developing in Visual Basic, Visual Studio 2010.

  I developed my app of the NI AcqStrainSample example. What I found in the order is:

  -CreateStrainGageChannel

  -ConfigureSampleClock

  -create an AnalogMultiChannelReader

  and

  -Start the task

  There is a timer in the VB application, once the task begun, that triggers the playback feature. This function uses:

  -AnalogMultiChannelReader.ReadWaveform (- 1).

  I have no problem with CreateStrainGageChannel, I put 8 channels and other settings.

  Regarding the ConfigureSampleClock, I have some doubts. I want a continuous acquisition, then I put the internal rate, signal source 1000, continuous sample mode, I set the size buffer using the parameter "sampled by channel.

  What I wonder is:

  (1) can I put any kind of buffer size? That the limited hardware of the module (9235) or DAQ (9188)?

  (2) can I read the buffer, let's say, once per second and read all samples stored in it?

  (3) do I have to implement my own buffer for playback of data acquisition, or it is not necessary?

  (4) because I don't want to lose packets: y at - it a timestamp index or a package, I can use to check for this?

  Thank you very much for the help

  Hi Roberto-

  I will address each of your questions:

  (1) can I put any kind of buffer size? That the limited hardware of the module (9235) or DAQ (9188)?

  The samplesPerChannel parameter has different features according to the synchronization mode, you choose.  If you choose finished samples the parameter samplesPerChannel determines how many sample clocks to generate and also determines the exact size to use.  But if you use streaming samples, the samplesPerChannel and speed settings are used together to determine the size of the buffer, according to this excerpt from the reference help C DAQmx:

  

  Note that this buffer is a buffer software host-side.  There can be no impact on the material available on the cDAQ-9188 or NI 9235 buffers.  These devices each have relatively small equipment pads and their firmware and the Driver NOR-DAQmx driver software transfer data device to automatically host and the most effective way possible.  The buffer on the host side then holds the data until you call DAQmx Read or otherwise the input stream of service.

  (2) can I read the buffer, let's say, once per second and read all samples stored in it?

  Yes.  You would achieve this by choosing a DAQmx Read size equal to the inverse of the sampling frequency (during 1 second data) or a multiple of that of the other playback times.

  (3) do I have to implement my own buffer for playback of data acquisition, or it is not necessary?

  No, you should not need to implement your own stamp.  The DAQmx buffer on the host side will contain the data until you call the DAQmx Read function.  If you want to read from this buffer less frequently you should consider increasing its size to avoid the overflow of this buffer.  Which brings me to your next question...

  (4) because I don't want to lose packets: y at - it a timestamp index or a package, I can use to check for this?

  DAQmx will meet you if all packets are lost.  The default behavior is to stop the flow of data and present an error if the buffer of the side host DAQmx overflows (if, for example, your application does not pick up samples of this buffer at a rate equal or faster than they are acquired, on average).

  If, for any reason, you want to let DAQmx to ignore the conditions of saturation (perhaps, for example, if you want to sample continuously at a high rate but want only interested in retrieving the most recent subset of samples), you can use the DAQmxSetReadOverWrite property and set it to DAQmx_Val_OverwriteUnreadSamps.

  I hope this helps.

• Networking the cDAQ-9188 - no 'network devices' Max

  Hi all:

  I have problems connecting my NI 9188 cDAQ via ethernet to my computer. MAX does not display it in his repertoire, or it displays "network devices". Based on the guide NOR offer, I don't know what else to do (I can't access the modules in a LabVIEW project which is my problem).

  I used the tool online browser that seems to be the equivalent of MAX and works very well - I can see the IP address of the controller and it shows what chassis slots are used by what the map.

  I tried manually inputing this IP in a remote system to the MAX, but that hasn't worked.

  Any ideas on how I can networks controller on my computer so I can actually use in a LabVIEW project.

  I have LabVIEW 2012 32 Bit. Would a student version be the cause of the problem?

  Thank you very much.

  cuaerospace wrote:

  I am familiar with the method you describe, but I agree with all the power cycling to get some of these products to work. I had to do this several times with the cRIO. Any chance you could give a little more than a description step by step explcit of your approach? Thank you!

  Good so here's what I did to try to reproduce and to have a step by step of what I had to do.

  Firstly I have reset my cDAQ so that it would be if all goes well in the mode that yours is.  To do this, I pressed the button to reset for 5 seconds then.  I have also all my network devices defined to "Obtain an IP address automatically" in the IPv4 settings in my network connections.

  After that, I start MAX.

  Go to devices and Interfaces > network devices, then I right click and choose Find devices.  It took a lot of time and the list was empty, but then I noticed that while he was always looking in this window, the MAX window showed my cDAQ-9188, who was a white device.  There, he registered the IP address as 169.254.93.149.  At this point if I went to the device to the MAX I saw where he sometimes States under network settings that no network adapters found.

  So I closed MAX and open my "view network connections" in Windows, I just searched that term in the start menu.  Then for my device properties, went to the IPv4 properties, set the IP address of 169.254.93.0 with 255.255.0.0 default gateway.  It is, so I'm on the same subnet as the appliance.

  I then restarted MAX now when I go to the device under devices, network and network settings I can set static IP and subnet is 255.255.0.0 10.10.10.100 then save.  Then closed MAX.

  Then I went back to my view network connections, the static value of what I really wanted is 10.10.10.0

  MAX then launched.  Find my device that is always white, click Add the device.  And then all is good.  I don't know if all these steps are necessary, and I don't know if there is an easier way, but it worked for me.

• Frequency control of NOR-9476 on the cDAQ-9188

  I am using a cDAQ-9188 with a NI 9476 module, and I would like to control the frequency of the digital signals that the module was released. I tried to use the example of Pulse Train digital continuous with control of the frequency, but impossible to select the 9476 since there is no internal counter, and when I change the 'Digital output' task, the frequency control disappears. Is it possible to use the internal counter of frame to control the output frequency of the 9476? I need to get out a range of 0 to 1 kHz.

  Most of my program would output a digital signal of a certain frequency every second in real time from a given table. For example, if I have an array of [10, 20, 15, 100,...], it generates a model of up/down of 10 cycles per second for a second, followed by 20 cycles (with a shorter period) for a second, then 15 cycles per second for a second, and 100 cycles per second for a second.

  I tried to use avoiding to do, but it was very slow, with a delay of 63 ms between each cycle, when I wanted a 1 ms delay.

  CDAQ-9188 has 4 counters built in, but you cannot access it by using the NI 9476-, but the NI 9401 module can access the built-in meters.

  The good news is that you can always generate your pulse train, using counters, it generate on the PFI lines on the chassis itself and not through your module.  If you need to generate more than a pulse train, or use all four counters, you will need the module NOR-9401/9402.

  In order to get the speed, you will need to use the capabilities of hardware counters timing.

  I hope this helps!

  For more information:

  https://decibel.NI.com/content/docs/doc-12161

  http://www.NI.com/white-paper/9384/en

• Module AO trigger using PFI on the cDAQ-9188

  I use a cDAQ-9188 chassis with an AO (NOR-9264) module.  Is it possible to configure a PFI (channel on the frame) as an input signal to synchronize an AO channel with the trigger?  Here's what I'm trying to do.  I need a channel on the AO module to switch voltages in sync with the trigger when the user "push a button".  So once the button is pressed, the channel of the AO will not change until the next trigger pulse.

  Thanks for your help

  Ben

  Hello Ben

  I hope you are well.  The consensus is that it is possible.  Have you tried this yet?  If so, can you tell me what you have tried and how you made a lot of progress?  I recommend the following VI example: Cont Gen tension Wfm - Ext Clk.vi.  Are you able to get all the functionality you are looking for this VI.  It was recommended that I'm showing you this.  We find this VI under help--> find examples and then material input output &--> DAQmx-->--> voltage analog generation.

  Please let me know how you are progressing and if you have need of all aspects of this example explained.  Thanks for choosing National instruments!

  Sincerely,

  Greg S.

• Initialization of the CDAQ

  Hello

  I use cdaq-9188 system. It was connected by ethernet to the PC. before starting my application, I need to check my cdaq hardware initialization.

  I mean wheather all IO models are connected properly and works fine

  you will need to check that the cdaq controller is busy or no status.

  need to check is to reserve or cancel the hardware or not.

  If the condition is pass, and then must start my application or by message.

  which is the best way to identify these task. ?

  There are three cases:

  1. the cDAQ-9188 is reserved per person.

  2. the cDAQ-9188 is reserved by the host.

  3. the cDAQ-9188 is reserved by another host.

  There is no direct way to query the status of booking, but you can deduce from the Self Test, which will return an error:

  1. you get an error. (- 201388 ' network device is not reserved for this host. ")

  2 self-test will work normally.

  3. you get an error. (- 201288 "network device is not reserved for this host.")

  This may be sufficient for your needs. If you want great between cases #1 and #3 case, then network DAQmx device reserve with the 'override' argument set to false reservation has different side effects:

  1. the cDAQ-9188 gets booked by the host.

  2. the cDAQ-9188 continues to be reserved by the host. (no change)

  3. you get an error. (-201420 "the network device is currently reserved by another host.)

• cDAQ-9188 Ethernet connection problem

  We bought 2 cDAQ-9188 and I can't get them to connect to the computer via the Ethernet connection. I can make them work if I use a short cable (10 ft), but the location that I need them is about 180 feet away. When I do right click on network devices and select Find devices that it returns Nothing found. Is there any suggestions on what I might be wrong or what I should do to make them work? I'm running LabView 2010 SP1 and the drivers provided with the units of the cDAQ-9188.

  Of course, the PC Ethernet card we use is low. I have them connected to a router and placed near the PC router, and now, they work very well.

• Using instrumented hammer model PCB 086D 50 with the NI9234 module and chassis OR cDAQ 9188

  Hi all

  I need to try to shock with a PCB 086D 50 instrumented hammer hammer. I use the chassis OR cDAQ-9188 with the NI9205 and NI9234 modules. The hammer is connected to the NI9234 and accelerometers are connected to NI9205.

  When I test the modules in SignalExpress I get very good results for the dog, but the accelerometers are ok. Also, if I am controlled the hammer OR Max where I have the option to activate the IEPE the result is ok. In SignalExpress, I couldn't find the option to activate IEPE.

  I have no experience using software, but I started to learn. Does that mean that I need to program the system for my setup in LabVIEW? Also, the installer of the equipment makes sense, the modules that I plugged on the cDAQ can be used simultaneously? Should I have the additional device in order to use the hammer with cDAQ 9188?

  Thank you very much

  Emina

  You can enable IEPE in SignalExpress. Here is a configuration for a single power hammer and three accelerometers a 9234-related.

  

  You don't mention the model for accelerometers. They are also the IEPE sensors? If so, have what conditioning of signals you added before the 9205?

  The Assistant Sound and Vibration (built on SignalExpress) contains an example of Impact Test. The Sound and Vibration Toolkit comes with a sample project for the impact test. With free evaluation period, go ahead and look at how one of these examples is implementing the configuration and the triggered acquisition.

• Problem of discovery of the cDAQ-9191 in MAX

  I have a new cDAQ-9191 with 9208 module that I have connected to my PC with an Ethernet cable.  I use DAQmx 15.1.1 in Windows 7 Pro SP1 64 bit and MAX 15.0.0f0.  The cDAQ-9191 appears under devices and Interfaces > network devices.  There is no IP address and its status is "disconnected".  There is no found network card.  There is no Firmware button, and add device only returns an error message.  See the two photos attached for details of 9191 properties.  I have tried to reset MAX configuration, restart the 9191, exchanging several cables, restart the PC, turn off all the other networks of PC, turning the firewall, but without success.  I searched the forum, but no one else has reported a solution to a similar problem.  The port LAN PC has a static address, and I've used the port to connect to other devices.  As this is obviously not a normal state for this 9191 I'm totally stuck with no idea how to proceed.  Is it a hardware failure?

  In addition, on my main PC (MAX 15.0.0f0, DAQmx 15.1.1, 15.0 IMAQdx, win 10 Pro 64-bit), MAX cannot find network devices.  I tried with an Axis Network camera and the 9191, which both appear on the other PC.  I can't find a solution to either but it's a real pain that MAX is not working properly when necessary.

  Hi Dr_M,

  If your LAN port has a static IP address, it must run a DHCP server, which can affect the 9191 an address on the same subnet.  If no DHCP server is found, the 9191 a local IP address of the default link.  Very likely, you met the latter, and the static IP address that you have assigned to your LAN port does not link local beach.  This means that your computer and your cDAQ are on different subnets, so MAX can communicate with the 9191.

  You can change the IP address of your LAN port to one in the local area connection (169.254.x.x, subnet mask 255.255.0.0), or you can configure your LAN port to automatically obtain an IP address.

  Once you access the 9191 in MAX, you can adjust the parameters IP back at your convenience, as long as the chassis and the computer you end up on the same subnet.

• LabVIEW 2010 with CDAQ-9188 and NI9205

  Hello

  I use the NI CDAQ 9188 with the Analog Input Module NI 9205. The specification of the NI 9205 module shows that there

  16 channel differential channel, or simple 32 took end. I use the 'DAQ Assistance' in Labview to configure the

  Module OR 9205. But it only allows me to select 8 differential channels. After I put the 8 channel, then the

  Terminal configuration allows no differential inputs. It allows only to CSR or NRSE entered.

  I'm doing something wrong? I just bought the camera to use for 16-channel differential reading.

  Thank you

  Bobby

  Hello

  It worked.

  Thank you

  Bobby

• No reconoce cDAQ-9188 via ethernet

  Hola Amigos

  Tengo el problema of Quebec able & Automation, me reconoce el chassis cDAQ-9188, pero no sus modulos he intentado todo lo, that will be replaced by Recomiendan en sesion http://digital.ni.com/public.nsf/allkb/DF65FCF0DD20D71686257949007ECAA7 pero esta no obtengo resultados positivos, alguien could orientarme...

  Lo agradeceria muchisimo

  PD: Editor lo me appears

  Hi pomontty,

  CDAQ networked systems requires a host booking, to avoid conflicts where multiple hosts on the network could attempt to access modules at the same time.  For this reason, you don't have access to your modules until you have selected the reserve chassis from the top of the window in the right-click menu or MAX on your device in the devices tree.  You cannot also self-test or reset the chassis when you have not booked, which is why you see the error that you have set.

• Multifrequency 9223 9215 sync and 9213 in cdaq 9188

  Hello

  I'm trying to synchronize three different modules (NI 9223 and NI 9215 NI9213) every acquisition given to various higher sampling frequencies (e.g. 9223 = 1000 hz, 9215 = 100 Hz and 9215 = 2 hz) and write files to separate data for my task. I am using a cDAQ-9188 ethernet and all modules are in the same chassis. There is an external trigger (which comes from an external source) to start acquiring data which are wired connected to the PFI0 channel in the chassis. What I want to do is: whenever the trigger is high, acquire 10seconds of data according to different sampling frequencies high above and write in separate data files. I followed the procedure referred to in the http://www.ni.com/tutorial/5376/en/

  Here's a snapshot of the block diagram

  

  Now, the problem I am facing is the 'average frequency (NI 9215) data' and 'data of Thermocouple (NI 9213)' are acquired and written immediately after that I have start the labview program. Fast speed data (NI 9223) are not written, and wait for the trigger signal. And then it throws an error 200284. If I do just a finished sample rate on NI 9223 alone (without adding/attempt at sync with other modules) with expectation of release it works without any problem.

  LabVIEW files are attached.

  Suggestions very much appreciated and you wish all happy new year.

  Thank you

  Roy

  Hi Roy,

  'average frequency data (NI 9215)' and '(NI 9213) Thermocouple data' is acquired and written immediately after that I have start the labview program.

  Yes.

  You forgot to set a trigger to start these DAQmx tasks!

  And then it throws an error 200284.

  The description of the error says something like "use a higher timeout value. Have you tried that?

• Suggest the cDAQ chassis applicable

  Hello

  In my application I will use a NI 9476, 9264 One, One two 9485, two 9265 9435 IO modules offer me please the appropriate chassis that I can use these modules.

  Thank you

  Prashant

  Hi, UPRR. You'll use 7 modules of data acquisition for your application, correct?

  In this case I recommend you to get either:

  1 NOR cDAQ-9188 - http://sine.ni.com/nips/cds/view/p/lang/en/nid/208990 - Ethernet connectivity

  2 NEITHER cDAQ-9178 -http://sine.ni.com/nips/cds/view/p/lang/en/nid/207534- USB connectivity, BNC connections for external clocks and 32-bit counters built into the chassis.

• Difference between the cDAQ-9174 and cDAQ-9178

  I have several cRIO-9081.  Each cRIO-9081 running NOR-DAQmx 15.5.  On four of the cRIO-9018 we show you cDAQ - 9178 with 8 modules.  Everything just worked.  On the fifth cRIO-9018, we tried to connect a cDAQ-9174.  The aircraft appeared in the Windows Device Manager and MAX, but MAX has indicated that the aircraft was missing (error-88705) and that Windows can't find a driver for the instrument.

  We then plugged a cDAQ-9178 in the fifth cRIO and everything just worked.

  What is the difference between a cDAQ-9174 and cDAQ-9178 other than the number of the module support?

  Paul

  Hi Paul,.

  It seems it could be a driver problem! What DAQmx version you have installed on two computers? Reinstall the latest version may be worth it because it looks like there may be corruption. You can find the latest version here: http://www.ni.com/download/ni-daqmx-15.5/5901/en/

  You can manually associate the device driver, here: http://digital.ni.com/public.nsf/allkb/5B80CAAA64413B4C86256C5E0000C1A7

  There are modules connected to the cDAQ chassis?

  Also, sometimes, this can happen if you do not restart your computer after the installation of the NOR-DAQmx driver. Restart your computer after the driver installation will allow you to reserve the device successfully. Here are a few others not to try:

  • Check the charger to device OR to see if it is running
  
  
  • Reset the service OR charger
  
  
  • Reset the MAX Configuration database
  
  
  • The system power cycle