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niDCPower Error code: -1074106671

September 14, 2018, 5:48 am
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From NI Max 18x, clicking on Test Panels for either a NI PXIe 4140 or a NI PXIe 4113, brings up the Instrument Studio, which proceeds to show an initialization error -1074106671. Our code errors out with the same error when calling "niDCPower Initialize with Channels".  Instrument  Studio claims "Error description not found", our code claims "An internal error has occurred".

 

This setup used to work, some equipment on GPIB/USB and USB was moved around but the PXI mainframe wasn't touched.  I've updated NI-488, VISA, Switch, DCPower and DAQmx to the latest, but no luck.

 

How does one track this error down?

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niDCPower Error code: -1074106671

September 14, 2018, 5:50 am
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From NI Max 18x, clicking on Test Panels for either a NI PXIe 4140 or a NI PXIe 4113, brings up the Instrument Studio, which proceeds to show an initialization error -1074106671. Our code errors out with the same error when calling "niDCPower Initialize with Channels".  Instrument  Studio claims "Error description not found", our code claims "An internal error has occurred".

 

This setup used to work, some equipment on GPIB/USB and USB was moved around but the PXI mainframe wasn't touched.  I've updated NI-488, VISA, Switch, DCPower and DAQmx to the latest, but no luck.

 

How does one track this error down?

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Self Calibration

September 14, 2018, 12:23 pm
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Hello,

This is a more generic question about self calibration.  I'm going to be writing some software to initiate the self calibration of PXI cards we have in our chassis.  Is there a way to know if I need to remove connections to a PXI card or if I can leave the connections present?  I only ask because I've been told we blew out some DUTs because they were connected when we performed a self calibration.  I think they were connected to some AO pins on a DAQ card, but I've got SMUs and DSA cards as well.  Do all inputs disconnect from their connectors to make the separate connection to the internal references?  Or will leaving cables connected influence the self cal?

Thanks for anyone that can help.

Erich

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PXI-5105 Digitizer Real-Time Raw Data

September 14, 2018, 2:04 pm
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Hi, I have one NI PXIe-1071 with one PXIe-8820 and two PXI-5105 (12-bit 60MSps). I want to get the real time raw data from PXI-5105 and process it in Matlab (also in real time). Please let me know what should I do for it? Sorry I am not familiar with NI's hardware and software. Thank you.

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NI 6585 IO Clock Module 0/1 and Timed Loop

September 15, 2018, 5:17 pm
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I have an external LVDS signal (clock) coming in to a 6585 and want to acquire data based on that signal, so I will connect it to the Global Clk input and choose "IO Clock Module 0" as the source for my timed loop. However, I only want the timed loop to trigger on the falling edge of the clock. Is that configurable?

 

And is access to falling and rising edges only available with the DDR connector CLIP? My interface is a 3 wire (clk, data, enable) serial so I'm using the Basic Channel CLIP to get access to just the wires I want but then I lose the falling/rising edge I/O property.

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1 Gbps DAQ 6587 - Reading only zeros

September 17, 2018, 1:39 pm
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Hello Internet,

 

For a long period I have assumed I have not been able to read using the 6587 Serdes Channel due to a problem with my cable or read code, but I can read data using the Basic Connector fine and can confirm I and supplying a sinusoidal signal using a DAQ 6341 attached to the same PXIe chassis.

 

This setup was complicated as I was unsure how to set up the Acquisition Clock to get the Serdes Channel to run at a faster clock speed (I was helped by NI), but I still can not read anything from the FIFO but zeros. Does anyone have any suggestions? The end goal is to read a digital signal from a single channel at a rate of 1 GHz.

 

Best,

Ian

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PXIe-8880 UDP error

September 18, 2018, 2:27 am
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Hello everyone,
I was working with PXIe-8880 and LabVIEW 2016. I had a problem with UDP communication protocol. 
My program works correctly with my PC and "Firesi FRS-RACK" protection system througth Ethernet and UDP protocol. All data transfers(requests and respones) is OK.
When i run the same program on PXIe-8880 , i don't have a response. I tried change IP adress of PXIe-8880, but thats not a solution.
As you see,  i made a new simple program with UDP squares and i still have no response. 
What's wrong?

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PXI 6583 DIO state when configured for driver

September 18, 2018, 3:13 pm
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I am using a PXI 6583 IO module connected to a 7953R FPGA for running test program communication using LVDS. Upon power up of the PXI there is no common mode voltage on the DIO output lines on the DDCB connector DIO lines. After initializing our FPGA target we now see approx 2.2V common mode on both + and - sides of a DIO diff pair when open circuited at the receiver end. We continue to see this forever until we power down the PXI chassis and reboot. Our problem is that when these lines are connected to the receiver, the receiver has no voltage on it's VCC rail. This presents us with a problem as some of these lines have ESD diodes to this VCC rail, which when un-powered are becoming forward biased and charging of the VCC rail is happening when its VCC is in a high z state. We can't seem to reset the IO module to return to an un-driven state when the program is complete so that the next time we connect something, these lines are back to an un-driven state. If we could, we could then make sure to power up the VCC on the receiver end before we begin using the IO module. Is there a way to return the outputs of the 6583 to an un-driven High Z state via SW? 

 

Dan

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Synchronizing SMU and Digtal Output with the PXI

September 19, 2018, 1:42 am
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Hi all,

 

This is my first time using the NI PXI system. In the system I have two devices, SMU and DAQ.

I want to send a trigger from the PXI backplane to synchroize these two device.

 

SMU is for driving test sample.

DAQ is for triggering measurement instrument.

 

Does anyone can provid some information about this for me?

 

regards,

Asher

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PXIe-4304 Digital Filtering

September 20, 2018, 7:16 am
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I have a PXIe-4304 Analog Input board that I would like to use to measure signals, some of which are square wave pulses. The built in digital filtering is causing "ringing" to appear on the square wave signal edges. I know this is due to the digital filtering. I can adjust the amount of ringing by varying the sample rate, and also get different results (but still undesireable ringing) when using Hardware Timed Single Point (HWTSP) mode.

 

The manual for the 4304 says the digital filtering is "optional", but I have not found any combination of settings that get rid of it.

 

Is it possible to disable ALL digital filtering (including the anti-alias filtering) on this board?

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Slot 4 of PXI-1033 issue

September 20, 2018, 11:43 am
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I have a PXI-1033 connected to a RTOS system, 3 PXI-6133 in slots 2-4, a PXI-2536 in slot 5 and PXI-7811R in slot 6, system is setup with DAQmx 16.0.0,  chassis shows up fine as do all the cards, self test on the PXI6133 say OK. 

 

this is not a new system, it has been used extensively for the last 4 years

 

Using NI demo  Voltage - Finite Input.vi - I can trigger and capture from slots 2 and 3 (PXI1Slot2/ai0:7,PXI1Slot3/ai0:7) Trigger is set as digital reference /PXI1Slot2/PFIO, rising edge 5 pretrigger samples, work as expected.

 

However if I add slot4 it fails, acts like it never triggers.eventually times out with a data not all acquired error. I've tried just capturing on slot 4 by itself using it's PFIO trigger - same results.

 

I've swapped out slot 4s PXI-6133 with another - same results. Until I swapped the cards the hardware has not been touched.

 

I can also communicate and control the 2536 and the 7811R without any issues, sadly I do not have another 1033 to swap it out with.

 

any idea's on how to figure out exactly what is wrong?  Rather odd that it would just start doing this.

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Synchonisation of PXI 4462 with PXIe 6361 / 6363

September 21, 2018, 2:46 am
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Hello everyone,

I have a problem where I have to take sychronized measurements of 49 Sensor signals (48 Acceleration Sensors and one Force Sensor). I used the example in the Labview Help and altered it a bit to sychronize my PXIe 6361 with the PXIe 6363. So that gives me 48 Channels in single ended mode. To get the needed additional channel I wanted to use one card which we already had, the PXI 4462.

 

I hoped that it would be possible to just add it with the trigger in slave mode but I get the error message Error -200077 at the trigger property node of the PXI 4462:

 

Possible reason(s):

Requested value is not a supported value for this property. The property value may be invalid because it conflicts with another property.

Property: SyncType
Requested Value: Slave
You Can Select: None

Task Name: Kraftsensor

 

When I select None I get the error message:

Error -89136 occurred at DAQmx Start Task.vi:1. 

Specified route cannot be satisfied, because the hardware does not support it.

Property: RefClk.Src
Source Device: PXI14461
Source Terminal: OnboardClock

 

The use of the onboard clock of the chassi(PXIe 1075) also didnt really help - same error. I'm not quite sure anymore whether the PXI 4462 card is able to accomplish this because in the Help Examples it is not listed as usable for this sychronisation example. The sychronization examples I find online ( https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000kHJ7SAM ) use a slightly different approach but the problem with shared clock would nevertheless be there.

 

Unfortunately I'm a beginner in Labview, I'm also sure there is a more elegant way of saving the data to a file than using the express VI, but so far it did the trick.

 

Hopefully one of you has an alternative idea (I don't have Timimg and Sychrinisation Card)  or just confirm that it's not possible with the hardware present.

 

Thanks in advance!

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Flaws in NI DCPower drivers?

September 21, 2018, 4:12 pm
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Hi, All,

  in electrical measurement, like what we usually practice: output voltage and monitor current. there are two parameters related to current measurement: "current measurement range" and "current compliance".  these two parameters should be separated and not correlated, in other words, if I measure a 1nA signal, I can set the compliance as high as 1000A, the system should still be able to give the same reading as the compliance set at 1uA as long as you set the "current measurement range" as auto. therefore the compliance shouldn't t affect the measurement readings except it is set too small. but in NI's case, I think the NI driver that was supposed to set the system into "auto range" is somehow messed up, it actually  set the current measurement range as  " measurement range >= the compliance". this is what several of us discussed and find out. if you have a NI SMU at hand, and with this example vi from NI-- "NI DCPower hardware-timed voltage sweep", you can check youself. Just measure the background noise with different "compliance" input like 10-8 vs. 10-3, you will notice the change in the readings. one thing to clear, in this vi,  the current compliance is called "current limit". 

  at this moment, it seems NI don't have a functional driver/sub-vi to auto-set the current measurement range. then when users measure device other than a resistor, they will not succeed because you can not use one current measurement range to deal with all the data points, especially when the readings spread over several magnitude. for example if the device's current is 1nA at 1V and 2mA at 2V, then 1nA again at 3V.   if you set the current range as mA, then the system's resolution would not be good enough to tell the nA. if you set the current range as uA, which should have enough resolution to tell nA, then it can not handle the mA readings.  I wonder if other user have encountered the same situation or NI is aware of the situation. 

 

regards,

ted

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SCXI 1125 Outputing 8V

September 24, 2018, 7:05 am
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Hi,

I've recently relocated x2 SCXI racks. I now have an output on certain channels of 8 volts.

 

I've measured the mA inputs and have also disconnected the 1328, 1320. Even with the 1328 and 20's removed I am still reading 8 Volts on the channel. When the rack is turned off I get 0 Volts.

 

Has anyone seen this previously, can anyone help?

 

Cheers

Andy.L

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Suggestions for setting up a new PXI system

September 24, 2018, 10:20 pm
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Hi all,
We are planning to setup a PXI system for the computer control of our new experiment. I have few questions:

1. Our choice for analog output card is PXIe-6739. The datasheet mentions a maximum update rate of 1 MS/s if we use upto 16 channels after which it drops to 350 kS/s. But it also says this is the update rate if we use one channel per bank (1 bank = 4 channels as per pin-out). This card has 64 output channels, so 16 banks.

My question is, if for 10 banks I use one channel per bank and for renaming 6 banks I use all 4 channels per bank, can I have 10 fast channels with 1 MS/s update rate and 24 slow channels with 0.35 MS/s update rate?

 

2. Our choice for digital I/O card is PXIe-6537. The maximum TTL voltage it can generate is 3.3 V. Would standard TTL devices (of 5 V) respond to this 3.3 V? OR is there a way to pull-up 3.3 V to 5 V (the easiest way, and not by myself soldering a bank of amplifiers.)?

 

3. Does NI provide any PXIe/PXI compatible card which can produce a variable frequency time-base (clock) under hardware timing?? I would like to stress hardware timing for precision timing. A similar third party solution is like PulseBlasterESR-CompactPCI (LINK).

 

4. Are there any BNC breakout boxes for PXIe-6739 and PXIe-6537. The screw terminal ones are the only compatible I know, but we want BNC breakout boxes for these cards if available.


Thanks.

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NI PXIe 6363 Analog Output

September 25, 2018, 5:10 pm
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Hi,

We are using NI PXIe 6363 DAC module in one of our project.

We are in need of connecting 10V DC input into one of the analog output channel to test one certian test case.

By injecting 10V DC into an Analog Output channel will have any impact / damage o the card?

 

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PXIe-8234 (Ethernet Interface) - speed and flow control

September 26, 2018, 1:27 am
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Hi,

Where I can set transmission speed and flow control for the PXIe-8234 card? The Properties >> Configure >> Advanced window lacks these settings.

 

I am receiving lots of "TCP previous segment not captured" in the Wireshark from the Ethernet Interface. I would like to set the slowest possible speed to be sure that the issue is not related with too slow capture speed of the Wireshark.

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PXI -8430 into NI-1078-Chassis. Which slot is compatible?

September 26, 2018, 4:53 am
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Hello together,
I am about to connect the Serial RS232 PXI-8430 card in our PXI-1078 chassis. There are different slots available. Which one should be used for this particular card?

 

Best regards

Lysandros

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Connect eRIO 9149 to PXIe 8840 controller

September 27, 2018, 11:17 am
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I am trying to use an ethernet RIO extension chassis with a PXIe 8840 RT controller, and I can not seem to get the two to connect.  I have configured both IPs on the same subnet in MAX, and I can connect individually to them through MAX.  But when I try to use the second ethernet port on the PXIe to connect to the 9149, I get error -63040 "A connection could not be established to the specified remote device."  

 

I have used this chassis before but with a Windows computer, not with a RT Controller.  I tried using a standard Cat 5 cable, a Cat 5 crossover cable (listed in the bottom of the KB page about this subject), and putting a switch in-between the two, and each time I have gotten the same error.

 

Any Ideas?

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Running Digital Pattern Generator and Labview simultaneously

October 1, 2018, 11:05 am
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I need to run the digital pattern generator to get the IC into a particular state and then run LabView to raise the voltage on some of the channels while monitoring current on them.  I tried a simple experiment of setting one channel to 1V with the pattern generator, then started LV and could not control the same channel to raise its voltage.  I don't want to write my entire digital test that gets the IC into the desired state in LV to do this.  I would rather use the pattern generator.  I also don't know how to monitor current from the pattern generator.  Does anyone know a simple way to do this in either the pattern generator, or combo of it and LV?

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