"Chassis Temperature" in Analog Input Module for FPGA (cRIO-9201)

I have just gotten my cRIO with a analog module (9201) and a digital output module (9472).
When I place an Analog Input Module on my block diagram and double click it, I can choose from the following inputs:
Channel 0 through Channel 7
AND
Chassis Temperature
I have tried to find any documentation for this "Chassis Temperature" but so far without success.
If I read this input and feed it straight to an indicator, I get values in the range of 120 to 150.. Now, without more information, this number is rather useless. Does anyone know how to transfer this data to a temperature (either in the Celcius scale or the Fahrenheit scale)?
Thank you!
Project Engineer
LabVIEW 2009
Run LabVIEW on WinXP and Vista system.
Used LabVIEW since May 2005
Certifications: CLD and CPI certified
Currently employed.

I still did not find any documentation for this "feature" but I lucked out and found the following:
in the folder: \labview 7.1\examples\FPGA\CompactRIO\cRIO-910x\
you should have a file called:
cRIO-910x support files.llb
in this there is a convert to temperature vi.
To get the raw data as a temperature, it looks like all you have to do is divide the binary data by 4 and the answer will be in Celcius.
Project Engineer
LabVIEW 2009
Run LabVIEW on WinXP and Vista system.
Used LabVIEW since May 2005
Certifications: CLD and CPI certified
Currently employed.

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How to use both digital and analog input modules in the same worksheet - MCC USB1208LS

Dear all,
Hi, I am Imran. I am using MCC USB1208LS. I have created the worksheet using digital input module as below and able to execute (run).
But when i add another analog input module in the same worksheet and executes, An error Message pops-up as in the below image
I have connected temperature sensor sognal to the analog input of USB1208LS. When using analog input alone in the worksheet, it indiates the actual values.
is any black box solve? please guide me. I am attaching in images
We already placed a purchase order for USB1208FS. Will it sort out my issues?.
Thanking you,
Imran Mohamed.
Attachments:
present worksheet digital input only.JPG ‏67 KB
with analog input module.JPG ‏81 KB
error menu.JPG ‏77 KB

Hello Imran,
the USB-1208LS is not capable of running concurrent operations such as an analog input scan and ANY digital Ins, Outs, counter reads, or analog outs. In Dasylab, the 1208LS is scanning, and nothing else from that particular device can be requested of it while that is happening.
Yes, using the 1208FS will resolve some of these issues.
Please refer to the ULHELP.CHM file installed on your computer in c:\program files\measurement computing\daq for details on this issue, et al.
also I recommend you send your MCC/DASYLab requests for support to [email protected] as MCC staff (that includes me) does not normally monitor NI's Developer Zone.

How do I acquire multiple signals in the NI cDAQ 9172 using 2 analog input modules?

Hi everyone,
Is anyone familiar with using the NI cDAQ 9172? This is my first time using it and I am not sure what exactly I am doing wrong... Alone with a NI 9233 analog input module, it works great. I can grab my 4 signals from each channel and go. However, when I add another analog input module to the mix, it gets an error. It looks like it is reading only one and not the other. It bombs at one of the DAQ start task and read task.
Basically, the block diagram is just a double of the one 9233 working alone. Is there something needed for input to make the 9172 working? Any ideas?
Any help is much appreciated. Thanks!!

Hi Jud,
Both threads are correct. The cDAQ-9172 has a single analog input timing engine, so both of your analog input modules will need to be in a single task. The other VI you referenced shows one analog input task (with channels added from two modules) as well as an analog output task. Analog output has a separate timing engine from analog input, so both of those can run in parallel independent tasks.
The beginning of this thread is a good example; a single DAQmx Create Task followed by a DAQmx Create Virtual Channel for channels from each module. Also, Getting Started with NI-DAQmx will give you the fundamentals for data acquisition, though I don't know how many of their examples use CompactDAQ.
Regards,
Kyle

Scc analog input modules, e.g., ai07 or ai13

On the SCC-AI series such as the AI-07, what is the relationship between physical channel inputs (ai0 and ai1) as seen in Measurement and Information Explorer (MAX) versus module pin numbers 1-2 and 3-4? Are pins 1-2 the same as ai0 and pins 3-4 the same as ai1 or is it the opposite? Neither the SCC Quick Start Guide nor the SCC AI Series User Guide nor the SCC Configuration Guide have this information. Thank you for any help!
Solved!
Go to Solution.

Hi Louise,
Page six of the User Guide and Specifications shows a block diagram.
http://www.ni.com/pdf/manuals/371066d.pdf
On the right-hand side of this block diagram, you can see the E/M series DAQ Device inputs are AI (X) or AI (X+8). Since these modules are signal conditioning modules, they do not actually perform a measurement, they simply condition the signal so that a measurement by the DAQ device can be taken.
AI (X) is going to be the channel you specify on the DAQ device (for instance, analog input channel zero). If you are performing a differential measurement, the spacing must be eight apart, and AI (X+8) will be the other side of the signal that plugs into your DAQ device (in this example, analog input channel 0 + 8 = 8).
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National Instruments

Programming Analog Input Registers for MSeries NI-6221

I am trying to understand the Preliminary M Series Register Map in order to correctly setup and acquire data from the Analog Input channels of my PCX-6221 card. I have been able to figure out the DIO locations and use them but I am having trouble understanding what I have to do to configure and acquire data using the Analog Input registers of the card. I need to program at this level for an RTX application using Microsoft Visual Studio Net 2003 and have had great success doing so with other NI Cards. I have tried looking at the examples provided by the MDDK but I haven't been able to create a environment that allows me to compile them with Chipobjects and it appears like alot of the work is hidden by the subroutines.
I wonder if someone had a high level algorithum using the Register Map it would help out alot.
Questions:
How would I create a multiple channel Scan List and load it into the card setting gain etc...
How would I configure the card to acquire continously at a specified freq (ex 1000 samples a sec)
How would I start/stop acquisition
I would guess getting the status of the FIFO and accessing the FIFO is a matter of reading the AI_STATUS_1 and AI_FIFO_DATA locations
Would looking at the Register Programming Manual for the "E" Series help me or just get me more confused?
Thanks in advance for any light you can shed on the subject.
Floyd

Hi Floyd-
Let me address your questions individually:
How would I create a multiple channel Scan List and load it into the card setting gain etc...
A multi-channel scanlist can be created as shown in the method aiConfigureChannel() from ai.cpp in the M Series MHDDK \Examples folder. Note that the other operations leading up that point (notably, aiClearConfigurationMemory() must be performed in the order shown in the various AI examples. aiex3.cpp is the most useful starting point for investigation, in my opinion.
How would I configure the card to acquire continously at a specified freq (ex 1000 samples a sec)
aiex3.cpp shows how to setup the device and its DMA controller (aka the "MITE") for DMA operation. In order to configure for continuous operation you set the "continous" flag in that example to kTrue. The effect of that setting is to program the STC-II to generate either a finite or continuous AI sample clock. This programming is performed in the function aiNumberOfSamples() from ai.cpp and has the effect of setting the appropriate bitfield for continuous operation in the AI_Mode_1 register.
Earlier in your post you asked if the STC Technical Reference Manual ( http://digital.ni.com/manuals.nsf/websearch/E929838D7D0EE50986256728007FEADF ) would be a good reference. In fact, it's a great reference from the perspective of understanding the bitfield/register names and understanding the basics of how the timing hardware works (for example BC, UC and other sample counters are all functionally equivalent in the STC and STC-II). From the perspective of actual register writes and reads, the functionality is different between E Series and M Series. The biggest difference, as another forum user alluded, is that we map and write directly to the registers on M Series so Windowed_Mode reads and writes are no longer necessary.
Another difference between STC and STC-II is that the STC-II uses NI TIO-style counter/timers. For that reason, the NI 660x RLP manual ( http://digital.ni.com/manuals.nsf/websearch/4CE1C778F442B01386256C870060F9F3 ) would be a good reference for M Series counter/timer operations.
How would I start/stop acquisition
Assuming you don't need an external start trigger, you only need to write to the strobe bit AI_Command_2->AI_START1_Pulse. This will create a single start trigger pulse internally. The differences between AI_START1 and AI_START are described in the STC Technical Reference Manual.
A finite acquisition would be stopped automatically by the AI timing engine based on the number of samples you program via the method shown in aiNumberOfSamples(). Continuous AI would be stopped by first stopping the DMA operation and then calling aiReset().
I would guess getting the status of the FIFO and accessing the FIFO is a matter of reading the AI_STATUS_1 and AI_FIFO_DATA locations
Yes, this would work but I would strongly suggest using DMA as shown in aiex3.cpp. If you want to use "programmed I/O" to read the FIFO data directly, that method is shown in aiex2.cpp
Would looking at the Register Programming Manual for the "E" Series help me or just get me more confused?
In many cases it would be very helpful. See my comments, above.
I have inherited code that works on 65xx cards which I am pretty sure uses windowed mode that I am using in this 6221 driver. I have found that I can set the PLL registers to act as DIO and I can read the Discrete inputs just fine. Makes me curious, if Windowed mode is not used doesn't that mean the addresses are relative to the BAR1 address? Why then am I able to read the DIO?
I'm not sure why this would work- it's possible that some legacy functionality is still working due to the way you access the hardware in your code. For full functionality with M Series you must use mapped memory I/O to write and read from the device's registers.
Also starting with Clock_and_FOUT according to the example I set it for Slow_Internal_Timebase. But when I read back that Address it is always zero. According to the register map it is a "write". Does that mean I can't read it's contents? Or do I seem to have a problem because I am trying to use windowed mode with this card.
Yes, the "write" registers are write-only and the "read" registers are read-only. The effect of data read from or written to "write" or "read" registers, respectively, is undefined.
Hopefully this helps-
Tom W
National Instruments

Connector block 16 analog input channel for 6036E

sugesst me connector block of 16 analog input channels compatible with 6036E daq card

Thanks for contacting National Instruments.
You really have two choices in connector blocks: the SCB-68 and the CB-68LP. The CB-68LP is inexpensive, but unshielded. If you are concerned about introducing noise into your signal, or if you are talking small measurements (mV range), then the shielded option, the SCB-68, will be better for you.
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National Instruments Support

How to build a current loop with cFP-1808 and analog input module AI-110?

I am trying to build a current loop to measure temperature via and a resistance thermometer a transmitter that converts the signal to current. I am using cFP-1808 with the power supply PS-5 directly connected to it.
For the current measurement I am using AI-110 but I am having trouble with getting current in my loop. I have looked in he manual of the AI-110 module and am using the set up for a "loop with an external power supply", counting the PS-5 as external. That is to say, I have connected the negative transmitter terminal to Vsup on the AI-110, and the positive side to Vin. Now, however, I am stuck. I don't get any signal in my loop.
Can I use the PS-5 to power my AI-110 module or do I need to use another external power supply? In this case, how do I connect this?
Thanks for any help!

Clara G:
I overlooked that in your 1st post you were connecting the other end of the transmitter to Vin, you actually need to connect it to Iin on the AI-110.
Regarding the use of the PS-5 to power the cFp and supply power to the loop, I do not know if that will work or not.
Suggest that you switch over to Iin terminal and use the separate 24V supply to power the loop. If that works, them maybe try the PS-5 for both the cFP and loop power.
-AK2DM
~~~~~~~~~~~~~~~~~~~~~~~~~~
"It’s the questions that drive us.”
~~~~~~~~~~~~~~~~~~~~~~~~~~

Analog Input Module Values Question

So I started to use the C-Rio for the my research. I connected a simple 7805 module to A0 of my 9222 module. I was expecting digital values, but it seems like I am getting the actual voltage value. Does the 9222 module automatic convert the digital value to the voltage value, or did I do something silly?

Hello,
I couldn't find anything about a 7805 module, but I presume you meant a Digital I/O module?
A digital signal is still an electrical signal, and it exists in the real world as real voltages (e.g. '0' = 0 V and '1' = 5 V). So, the value in your screenshot (-0.00017) looks like the voltage that represents a '0' bit, plus some electrical noise.
Your NI 9222 doesn't know what it's connected to, and it doesn't understand digital signals -- it just reads and reports whatever voltage is presented at its input.

Programming Analog Input Registers for MSeries NI-6280 under rtx

I have an example of aiex1.cpp,I kown it write some bit in some register,I want to translate it into RTX.but I found some register is only wirte and I also dont kown what the default bits in registers is,so use " *(u16*)addr_tmp|= (1 << 7);" is wrong, what can I do about writing some bits in register under RTX? please help me
beilei
Solved!
Go to Solution.

Hello Beilei,
Yes, the _softCopy starts out at 0. However, please remember that the _softCopy isn't always 0. After the line you mention runs, a value is saved in newValue...after flushing newValue to the register, that value is also saved in _softCopy. Basically, this proceedure ensures that the other bit fields in _softCopy are not modified unintentionally.
If you have any doubts about what is happening, I would recommend stepping through the code while it is running so that you can see what is happening in that line (you may wan to break it out into multiple lines).
~~~~~
Regarding the errors you are getting in RTX, please follow the readme for building the examples with this OS interface. The Readme says that it was tested with RTX 6.1. If you are using a later version, you may need to contend with any changes that may have happened with this operating system. If you work through any issues, please post back to let us know what went wrong. We welcome any feedback about this OS interface!
Thanks,
Steven T

Would anyone know how to program the Labview code for the following: Recording an analog input signal for 100msec and then repeating this 100 times in order to finally have an averaged signal (waveform)?

I have added a vi, but it doesn't quite work. Would be very grateful if someone could help, thanks!
Attachments:
Average_0411041_2.vi ‏77 KB

The attached VI collects 100 ms of data and does a rolling average. Since your sub-VI were not included I created this from scratch. There are comments in the code. I hope this is what you need.
Dirk
Attachments:
rollingaverage110x100.vi ‏47 KB

Programming Analog Input Registers for MSeries NI-6280 under rtx

I have an example of aiex1.cpp,I kown it write some bit in some register,I want to translate it into RTX.but I found some register is only wirte and I also dont kown what the default bits in registers is,so use " *(u16*)addr_tmp|= (1 << 7);" is wrong, what can I do about writing some bits in register under RTX? please help me
beilei

hello,steven! I found another question when using pxi 6280. the exampels what you give is collect Finite point，but i want to collect Consecutive points。now I do not kown what register to control how much point I want to collect because of no pdf about pxi6280.i want to kown what regiser to keep collecting Consecutive points。thanks！
beilei

Select module for resistance measurment

Hi,
I I would like to measure a componant that have a 3-5 Ohm resistance.
Change in the resistance value during my experiment is 0.003 Ohm.
Using DMM is not prefered becouase it has only 1 channel and i don't want to use switching card in addition to the DMM.
So I m looking for the correct modules selection that will allow me to measure the resistance change using 4 probe methood.
That means a current source and analog input modules.(can be one if possible)
For this I need a stable current source and hi resolution Volt analog input modules.
the requirments are:
1) not more then 10mA current (avoid heating of the componant)
2) 8 channels (more is good).
3) sampling rate max 100 Hz can be less down to 10 Hz f it help to reduce cost.
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10mA with 0.1mOhm resolution results in ONE µV !!
Additional thermoelectric EMV on the contacts etc....
Some ideas
-use a AC bridge configuration with a preamp .... Ups ...resistors with a tempco less than 10ppm/K !!
-ask Keithley , sorry NI
- a XXmA two pole current 'diode' (maybe in an appnote from Jim Williams ) in a 4 diode bridge sourced by a +- squarewave supply , building an alternating current source, and a differential preamp ... the pream is per channel , the rest might be done with muxer
did I mention 4 wire measurements??
Greetings from Germany
Henrik
LV since v3.1
“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'

Getting an error 33162 when trying to read analog input on FP

I am getting a error when trying to do a simple analog input read using Field Point. I have a FP-2000 network module and am trying to read channel 0 at FP-TB-10 @3 which has an AI-C420 analog input module in place. There is no definition for the error and I can read the signal from Field Point Explorer just fine.
I have downloaded the example continuous read vi from the web site and it does not work either. It seems that this should not be complicated but this is not the 1st problem I have had. I will take any suggestions. Thank you.

Mike,
Error code 33162, "Can not connect to item on module," generally is the result of attempting to connect to an item that is not available at the first connection attempt. This is frequently the result of an ethernet network module being offline when you attempt to connect to it. Since you are able to connect from FieldPoint Explorer, I suspect something else is going on. The likeliest possibilities that I can think of are:
1) You have more than one ethernet Comm Resource in your IAK file and you have provided the name for the wrong resource (e.g. you may have had a different IP address and created a new Comm Resourcefor the new IP address, but left the old one in place and are using the wrong one).
2) Similar to #1 above, you changed the IP address in
the Comm Resource but did not save the change so there is no module at the IP address it is attempting to communicate with.
3) There is a misconfiguration in the IAK file and the FP-TB-10 shows a listing for a digital module at address 0 rather than an analog module.
4) The module is misaddressed. I have occasionally seen instances where the protective end cover was not installed on the last terminal base and a piece of metal shorted some of the pins causing the addressing to be incorrect. Since this method of failure would also show up in FieldPoint Explorer, I do not think it is likely the root cause of your problem.
5) You have booted the FP-20xx in Safe Mode (although FieldPoint Explorer will not work in this case so I do not think it is likely).
Note: If you had successfully connected and then lost the connection, the error code is 33163, "The connection to the module has been broken."
Regards,
Aaron

What is the Fieldpoint analog input interchannel skew time?

I need to know what the interchannel skew is on Fieldpoint analog input modules because I need to aquire samples fairly close in time to one another simily to the typical MIO PC-based card. Also, I am wondering if the aquisitions can be externally triggered.

The FieldPoint IO modules are designed to continually sample all (4/8/16) channels and write the data to shared memory. FieldPoint controllers then read the shared memory and make the data available to the user (serial/ethernet) or controlling program (RT). There are no provisions for external triggering of ADC conversions. Nor are there provisions to prevent the user from oversampling or undersampling the shared memory (e.g. the controller reads the shared memory 5 times in-between the ADC updating a channel). The interchannel skew can be determined by taking the IO Module All Channel Update Rate (e.g. 1.08 seconds for the FP-RTD-122)and dividing it by the total number of channels (e.g. 8 for the FP-RTD-122). Thus, the delay in between any two adjacent channels
is 135 ms for the FP-RTD-122.
Ultimately, FieldPoint was designed for single point measurements and not for waveform or simultaneous measurements. The capability for triggered, simultaneous or deterministically sampled readings is not currently available in the FieldPoint system.
Regards,
Aaron

Problem with the analog input acquisition in labview fpga 8.5.1 and CRIO

Hello all,
I am using NI CRIO 9104 RT controller with 9014 FPGA chassis.I am using an Analog input module 9205.My problem is with the acquisition.I am using a
function generator which generates some sine wave of -1 to 1 ,5hz to125khz sine signal and i have connected to 9205 in rse mode.In FPGA vi i had placed the I/O node and placed an indicator(data type FXP).If i connect the i/o node to a chart or graph,i am not able to see the output.?How this problem can bbe solved
Next i had placed a FIFO in DMA transfer mode of depth 1023 which will accept the U32 datatype,so i did some manipulation as mentioned in a tutorial.
Now in RT VI i am reading the same data from the buffer in U32 and doing the reverse manipulation i am able to view the data.Now the problem is ..if i am
increasing the frequency of the input signal,the data is completly lost ?How can i overcome this problem...
thanks in advance,
srikrishna.J
Analysis Engineer,
Neurofocus

Difficult to see where is the problem ....
Be sure you are doing a good RT system by grabing reference design examples
Don't forget to specify the DMA FIFO size in the RT code
Doesn't matter the size of the DMA size under the FPGA project explorer.
Upload your code, You will get answers...
Mathieu

"Chassis Temperatur​e" in Analog Input Module for FPGA (cRIO-9201​)

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"Chassis Temperature" in Analog Input Module for FPGA (cRIO-9201)