Build application freezes, USB-6501

I am running LabView 7.1.1 on Mac OS X 10.3.9. I am controlling a couple of instruments via GPIB and the USB-6501 with DAQmx Base. My VI works fine. I'm trying to build a stand alone application with the application builder and it freezes during the build. I have unchecked the box to "Disconnect type definitions and remove unused polymorphic VI instances" in the Application Settings of the Application Builder and it still freezes during the build. I've tried to recompile the VI by holding down the option and shift keys while clicking the run button and it locks up then too. I have successfully built applications without the USB-6501. Can anyone offer some help? Thank you.

Hi All-
Unfortunately MAX is not available on Mac for troubleshooting, Mike. Vob, can you please verify whether you installed NI-DAQmx Base prior to or after installing the LabVIEW 7.1.1 patch? The driver must be reinstalled after installing the LabVIEW patch and after mass compiling your directories. You should not mass compile after the NI-DAQmx Base installation.
Also, this line from from the NI-DAQmx Base ReadMe might be pertinent:
If, when building an executable or shared object project using NI-DAQmx Base VIs, the Application Builder catches an error, you must restart LabVIEW before running any NI-DAQmx Base VI.
Please give these suggestions a try and repost if you are still experiencing problems.
Thanks-
Tom W
National Instruments

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Building application exe USB-9215 DAQmxBase LabView7.1 errors

Hello
I’ve been building DAQ applications using the NI 4-channel USB 9215 module. It has a sampling rate of 20ks/sec and with four channels the maximum I can sample per channel is 5000s/sec.
It works with no problems at this rate and lower rates, however when I compile an application and run it, I get the following message:
Onboard device memory overflow. Because of system and/or bus bandwith limitations, the driver could not read data from the device fast enough to keep up with the device throughput. Error code: -200361
This message appears irrespective of the sampling rate, even down to 1s/sec !!. I’m using Labview 7.1 with the ‘DAQmx Base Read.vi’ in a while loop. The PC spec is very high and no other applications are running. The PC has 4 USB ports; only two are in use, one for a mouse, the other for the 9215.
Any ideas would be welcome
Thanks in advance

Hi there,
What operating system are you running on and what service pack version?
It seems that there have been occurences of errors similar to this (with other USB devices 9201/9221) reported on machines with Windows XP service pack 1. In particular the version of the Windows file usbehci.sys, as reported in the following knowledge base article.
http://digital.ni.com/public.nsf/websearch/ADC80B3995042EB98625704C006B5753?OpenDocument
If this applies to your situation, I would suggest upgrading the service pack as recommended in the knowledge base article and see if this helps.
Regards
Hannah
NIUK & Ireland

Pulselength USB 6501

Hello,
I want to use one or more USB 6501 Boards to fire up some 10s of IGBTs. Each of these switches turns on ~10A for 1ms-3ms (each IGBT has a different turn-on length). Since the pulse pattern repeats after at least 40ms, i want to fire them step by step to minimize the stress for my main power line.
I managed to create a VI which does exactly what I want - with one exception: The digital waveform gets created from an array using "build waveform". But no matter what value I feed into "dt" to control the length of each digit/pulse, all I get is pulses of 1 ms for each logical "1".
From my point of view, "dt" tells the Channel how long it should stay "high" for each "1" it receives. Is this incorrect? I want to control the length of each pulse in steps of 0.1 ms - in other threads I read something about the need to use some kernel-functions to be able to use sub-millisecons resolutions. If this is correct, shouldn´t I be able to see a 2 ms pulse when setting "dt" to 0.002?
Thank you for every hint, Sascha
BTW: Labview 8.5 Evaluation / Labview 6.1 full
BTW2: In the attached file you will only find 8 digital waveforms for 24 digital ports... I don´t know how to save the full 24*20 binary array, therefore you will receive an error if you try to run this VI without correcting the number of physical ports to use.
Attachments:
IGBT.vi ‏49 KB
6501.png ‏53 KB

Hello Philosoph,
the USB-6501 is a static DIO device, which means it does not have an onboard clock to switch the digital ports with a certain frequency.
You can turn on and off the digital lines with software timing in LabVIEW. That is ok if the timing does not have to be very accurate - i.e. it does not matter if the pulse is 10 ms or 12 ms - and if the frequency is not too high. A pulse length of 1 ms is borderline - most of the time, it will probably work, but when your PC does have to do other tasks, you might get a delay of up to 100 ms. In any case, you will have a jitter on the pulse length. For higher timing accuracy requirements, you would have to use a DIO device with correlated, which means clocked, outputs.
Having said that, I would recommend a different approach for the signal generation. I attached a VI that writes state information to the digital outputs; you can modify the digital pattern in the array, and set the desired pulse length. As the first iteration of "Wait for next ms multiple" does not have a determined duration, I would leave the first line all zeros and start signal generation with the second line. If needed, you can wrap the for-loop in another loop to repeat the pattern.
Regards,
Johannes
NI Germany
Attachments:
Digital Signal - static.vi ‏19 KB

Usb 6501 unresponsive causing BSOD(Blue Screen Error)

There are a lot posts about the same issue but mine is a little peculiar so i decided to post it.
I am using two usb DAQ in the same pc(usb-6501, usb-6001), connected to the usb port on the back. The usb-6501 is used to obtain digital inputs from read switches, Sensors through an ssr. The usb-6001 is used to control 2 double valve solenoid, 1 dc motor, 2 indicator lamps. usb-6001 is also used to read analog values of current(using hall effect sensor) and voltage(using potentiometer).
At first i was facing problems with the usb-6001(the usb-6501 was working fine at this point) resetting during operation accompanied by BSOD. Then i learned it was due to my relay, which requires 30 mA of current to switch so i used the ULN2003a to interface the usb-6001 with the relays and after that the application was running perfectly for 4 days.
Now the usb-6501 is having the same problem and when i perform "Self Test" from NI MAX it shows "Error Code:50405" and i am able to reset the device from NI MAX only sometimes, other times i would have to unplug the USB device then plug it back in. As the application is used for an automated test rig the customer is frustrated by this problem. Once the card becomes unresponsive(or after the card is reset) BSOD occours.
I have checked all the device drivers and OS for any errors but they are fine. i have even tried changing the ram to solve the BSOD with no use.
System Details:
Windows 7 SP1
NI MAX 14.0
power saving is disabled
I have attached the latest mini dump files as they might help in finding out the reason behind this problem(File extensions changed for the purpouse of uploading).
I need to know: Is there any permanent solution for this problem? and what is the reason for this problem.
Attachments:
060115-12480-01.txt ‏315 KB
053015-12324-01.txt ‏315 KB
052615-17440-01.txt ‏315 KB

Additional info : i did an analysis of the dump files and this is the result
0: kd> !analyze -v
* Bugcheck Analysis *
DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)
An attempt was made to access a pageable (or completely invalid) address at an
interrupt request level (IRQL) that is too high. This is usually
caused by drivers using improper addresses.
If kernel debugger is available get stack backtrace.
Arguments:
Arg1: fffff88009fe10b1, memory referenced
Arg2: 0000000000000002, IRQL
Arg3: 0000000000000000, value 0 = read operation, 1 = write operation
Arg4: fffff8800657922e, address which referenced memory
Debugging Details:
READ_ADDRESS: GetPointerFromAddress: unable to read from fffff800032c30e8
fffff88009fe10b1
CURRENT_IRQL: 2
FAULTING_IP:
nifslk+822e
fffff880`0657922e 0fb650ff movzx edx,byte ptr [rax-1]
CUSTOMER_CRASH_COUNT: 1
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
BUGCHECK_STR: 0xD1
PROCESS_NAME: System
TRAP_FRAME: fffff80000b9c6b0 -- (.trap 0xfffff80000b9c6b0)
NOTE: The trap frame does not contain all registers.
Some register values may be zeroed or incorrect.
rax=fffff88009fe10b2 rbx=0000000000000000 rcx=0000000000000000
rdx=fffff80000b9c8e0 rsi=0000000000000000 rdi=0000000000000000
rip=fffff8800657922e rsp=fffff80000b9c840 rbp=fffff88009fe10b1
r8=0000000000000000 r9=0000000000000000 r10=0000000000000000
r11=0000000000000000 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000
iopl=0 nv up ei ng nz na po nc
nifslk+0x822e:
fffff880`0657922e 0fb650ff movzx edx,byte ptr [rax-1] ds:c8e0:fffff880`09fe10b1=??
Resetting default scope
LAST_CONTROL_TRANSFER: from fffff80003091be9 to fffff80003092640
STACK_TEXT:
fffff800`00b9c568 fffff800`03091be9 : 00000000`0000000a fffff880`09fe10b1 00000000`00000002 00000000`00000000 : nt!KeBugCheckEx
fffff800`00b9c570 fffff800`03090860 : fffffa80`06adc250 fffffa80`05c3a060 fffffa80`06adc250 00000000`0000ffff : nt!KiBugCheckDispatch+0x69
fffff800`00b9c6b0 fffff880`0657922e : fffff880`05d47468 fffff880`01d91f90 00000000`00000000 fffff880`09fe0770 : nt!KiPageFault+0x260
fffff800`00b9c840 fffff880`05d47468 : fffff880`01d91f90 00000000`00000000 fffff880`09fe0770 fffff880`09fe17a0 : nifslk+0x822e
fffff800`00b9c848 fffff880`01d91f90 : 00000000`00000000 fffff880`09fe0770 fffff880`09fe17a0 fffff880`09fe10b1 : 0xfffff880`05d47468
fffff800`00b9c850 00000000`00000000 : fffff880`09fe0770 fffff880`09fe17a0 fffff880`09fe10b1 fffff800`00b9c8e0 : nipalk+0x75f90
STACK_COMMAND: kb
FOLLOWUP_IP:
nifslk+822e
fffff880`0657922e 0fb650ff movzx edx,byte ptr [rax-1]
SYMBOL_STACK_INDEX: 3
SYMBOL_NAME: nifslk+822e
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: nifslk
IMAGE_NAME: nifslk.dll
DEBUG_FLR_IMAGE_TIMESTAMP: 51f2daeb
FAILURE_BUCKET_ID: X64_0xD1_nifslk+822e
BUCKET_ID: X64_0xD1_nifslk+822e
Can anyone help me with what this means?

How to I connect Sourcing digital output from My Interface Board to NI USB 6501 channel configured as Digital input

When I connect an input to DI channel of USB 6501 card from my board which has sourcing Output t, iIn the Off state it is not pulled down properly. The volatge on the port in is 2.1V -2.5V based on the pull down resistor on my board. I suspect that it acts as a voltage divider.
The state on the card is still show as "HIGH "state, even my sourcing output driver has a pull down resister. when I use this interface board for PCI mseries devices it works fine. Do the pull down resister on my sourcing output is not worth. Is this because of pull up resister 4.7k inside USB card 6501.
USB 6501 specifications shows the Digital input accepts both source and sink modes. By default the card is in sourcing digital input mode. How do we can convert this in Sinkind digital input mode.
Could anyone Please give your suggestions to overcome this issue .
Thanks you.

You really should not have both a pull up and pull down on the same line. Really weird things can happen. If you insist on having a pull down on your board, then I highly recommend putting a digital buffer chip between the DAQ and your board.
Some boards with DIO have a pull up, while others have pull down. You just have to watch the specs.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

Can I measure period with USB 6501?

Hi,
I was told that I can use the one counter in the NI USB 6501 to measure period. So, I wrote this little VI, modeled after the VI I have that measures encoder period using the counters built into the NI cDAQ 9174 with the NI 9401 digital I/O module. I have my encoder wires GND and 5VDC on terminals 1 and 2, respectively. Also, I have encoder channel A and Channel B wires connected to terminals 9 (P2.7) and 24 (P0.7) respectively. With the MAX, I can count edges with this wiring. The purpose of this VI is to display an average value of 25 period measurements of the encoder. The encoder (120 cpt) is turning at about 2-5 rev/second, so, not that fast, maybe a total of 500 period per second; should be easy for this counter. I'm just spinning it with my finger, so, not that fast.
Please advise how to use the USB 6501. I can't find any wiring instructions, other than the pinout, but, the pinout doesn't tell you which channel is the counter gate on the USB 6501, so, I found a response on MAX at channel 24.
When I run this, the array is correctly initialized to 0.5, but, then I get this error, 200431. I found some things on the forum that suggest I cannot measure period, that I can only count edges. Should I throw this 6501 away?
Thanks,
Dave
Attachments:
USB 6501 error.docx ‏24 KB
USB 6501 period measurement.vi ‏26 KB

The 9178 also only has 4 counters.
Do the 5 period measurements actually have to take place at the same time? Sometimes it might make sense to cycle through the channels to reduce the number of counters used (you wouldn't have to rewire connections or anything as the input terminals are software-defined). Switching from channel to channel in software should take on the order of ms depending on which hardware you end up using.
The 9171+(9401/9402) is a relatively cheap way to add additional counters to a system as the 9171 chassis has 4 counters just like the 9174 and 9178.
Best Regards,
John Passiak

Flash Builder 4.7 Freezing

Out of curiosity does anyone else have problems with Flash Builder 4.7 freezing while building? I will save a file and it generally seems to freeze on 3% or 27% (those numbers might be related to my project, obviously). This happens several times each day. I have to force it to close and relaunch. Not a big deal since I don't lose any code but it's just more of an annoyance because it interrupts my workflow and the tabs I had open don't save.

It appears that Flash Builder 4.7 has memory leaks. FB 4.7 freezes when the (used) heap memory reaches the maximum heap size.
I ended up tweaking my heap values (FlashBuilder.ini) to allow the application to grow insanely large (-Xmx2048m) to allow the application to run longer before running into the same problem (before restarting FB).
Until Adobe fixes this issue, if you have the available memory, try increasing the (-Xmx) setting in your FlashBuilder.ini file.
Look here for assistance: http://helpx.adobe.com/flash-builder/kb/sluggish-performance-out-memory-errors.html

Set up Signal Express to log when there is a change in state of the inputs (NI USB-6501 logger)

Hello NI Forum, I have recently purchased digital I/O logger NI USB-6501. This arrived with Signal Express, which I intend to use as a Lite version. I just wondered if it was possible to set up Signal Express to only add a log entry when there is a change in state of the inputs? I have this working on a 0.1sec sample period and can interrogate the logs after recording. Most of the time nothing will be happenning, I just wondered if there was a way to reduce the ammount of data captured? Cheers.

Ah that unfortunate, and yes start/stop conditions for loging are part of the Full version of SignalExpress
Here's the comparision: http://www.ni.com/labview/signalexpress/purchasing-options.htm
Sorry about that

Reading states of usb-6501 kit from command prompt?

Hi all!
I have been planning to use USB-6501 kit as one part of my test bench.
There will be need of checking state of some relays on
tested unit.
I would like to connect 6501 to those relays and read those
states using bare command prompt commands like readDigPort.exe
1. What software in need to install minimum to use writeDigPort.exe or readDigPort.exe commands at command prompt??
Those commands should be included in python script.
2. Is there such Linux commands also included somewhere in installation media/net ?
I am Using Fedora 3 ( Comedi not supporting 6501 ?)
3. I need only easy way to set and read values from 6501 ports which are my possibilities to do it?
Thank you!
Narsu Man

Hello,
Here are the answers:
1) You need NI-DAQmx Base driver for Linux. You may find the driver from web:
http://digital.ni.com/softlib.nsf/websearch/930D8687AD03A02C86256F8C00823BDB
Supported platforms and installation instructions can be found from here:
http://zone.ni.com/devzone/conceptd.nsf/webmain/42b73a7b82f0fec786256fb1007227ec
Please read the readme-file before installation.
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http://digital.ni.com/manuals.nsf/websearch/D7184CB9E6366E2186256FBF0076BBC3
This should help you to continue.
Vesa K
National Instruments

How can i use the NI USB-6501 digital I/O with matlab?

I want to use the NI USB-6501 digital I/O with data acquisition toolbox in matlab?

The USB-6501 is supported by Data Acquisition Toolbox in MATLAB releases R14SP3+ and later.
The full list of National Instruments devices supported by Data Acquisition Toolbox is here:
http://www.mathworks.com/products/daq/supportedio14005.html
Begin to learn how to use digital input and output here:
http://www.mathworks.com/access/helpdesk/help/toolbox/daq/f11-17944.html
Inside MATLAB you can view demos in the documentation.
To see two digital demos you can type these commands at the MATLAB command line:
>> showdemo('demodio_intro')
>> showdemo('demodio_line')
Best regards,
Sherryl
Sherryl Radbil
Data Acquisition Engineer
The MathWorks

Driving and dimming LEDs with USB-6501

I have a strip of LEDs hooked up to a power source with an intermediate dimmer. The specs for all that hardware is listed below. I am looking to switch from manual control to digital I/O. I have a NI USB-6501 DAQ but have never worked with it before and so would appreciate some guidance. The goal is to maintain maximum brightness but be able to dim the LEDs from my software. I've read several threads about simple on/off control but haven't found anything on dimming.
John.
LEDs: (color red)
http://www.superbrightleds.com/moreinfo/led-strips-and-bars/snfls-series-120-side-emitting-led-flexi...
Dimmer:
http://www.superbrightleds.com/moreinfo/single-color-dimmer-switches/ldp-2a-12-volt-dc-single-color-...
Power Source: (15 Watts)
http://www.superbrightleds.com/moreinfo/power-supplies/12vdc-cps-series-power-supply/68/
Solved!
Go to Solution.

In order to control something, you would need to be able to physically connect the 6501 but it does not appear you have anything to connect it to. From the image of the dimmer, it just has a knob.

Use DAQmxSetDigitalPowerUpStates In VB6 for USB-6501

How do I use DAQmxSetDigitalPowerUpStates In VB6 for USB-6501
I am trying to set thre default power on state for all digital lines
DAQmxErrChk DAQmxSetDigitalPowerUpStates("Dev3", "Dev3/port0/line0:7", DAQmx_Val_Low, 8)
The above line of code Crashes VB6.0 SP5 VB shuts down as soon as I try to exicute this code

Hi CUImsch,
The DAQmxSetDigitalPowerUpStates function takes four arguments: deviceName,
channelNames, state, and "...". The "..." indicates
that you can include additional channelNames and state arguments. The final
channelNames and state pair must be followed by a NULL argument. For example,
to set port0 to a default low state use:
DAQmxSetDigitalPowerUpStates("Dev3",
"Dev3/port0/line0:7", DAQmx_Val_Low, NULL)
If you want to set multiple ports with the same function call, include their
channelNames and state arguments after the first port's arguments and follow it
with NULL to indicate that you're done listing channels.
DAQmxSetDigitalPowerUpStates("Dev3",
"Dev3/port0/line0:7", DAQmx_Val_Low, "Dev3/port1/line0:7",
DAQmx_Val_Low, NULL)
The NI-DAQmx C Reference Help contains more information on this function.
Specifically under the Help Contents: NI-DAQmx C Functions » System
Configuration » DAQmxSetDigitalPowerUpStates.
I hope this helps! Let me know if there is anything else I can help with or
clarify. Have a great day!
Message Edited by ryan_d on 09-24-2007 06:10 PM
Ryan D.
District Sales Manager for Boston & Northern New England
National Instruments
Attachments:
SetDigitalPowerUpStates.JPG ‏155 KB

Error "Device identifier is invalid" USB-6501???

HI
When i run the script "USB-6501 Interactive Control.llb", i have this error "Device identifier is invalid"?
If you know another script that drives the "USB-6501" to check its lines, please help me?
Best regards
Solved!
Go to Solution.

USRP wrote:
When i run the script "USB-6501 Interactive Control.llb", i have this error "Device identifier is invalid"?
What do you mean by When i run the script "USB-6501 Interactive Control.llb"...???
--> Do you've USB 6501 listed in MAX, as shown in the picture below...???
--> Are you using correct string identifier as device name...???
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Make your LabVIEW experience more CONVENIENT.

USB 6501

I'm using the USB 6501 Digital I/O module, NI MAX 14.0.1 Driver, LabWindows/CVI.
Why all the outputs / inputs go high state when I restart and bootup my PC.?
They should stay at the state that the program has set. or at the low state when the PC restart

No, you have not read the specs. The device defaults to high impedance inputs on power up and it does not support programmable power up states.

NI USB-6501 questions

Hi Guys,
I have a question regarding on the NI USB-6501, is can support GPIB function? Because I am planning to interface it one of our equipments here which have the GPIB terminal in order to automate the calibration and/or set it automatically using GUI/Labview software.
Thank you and Regards,
Red

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