Setting voltage hp3649 in IVI TS 4 steps

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• Unable to set my HP6632B supply voltage of 12 v with the hp66xxbc

  Hello:

  I use the IVI hp66xxbc driver to control a power supply DC HP6632B, and I get an error when I try to set the voltage of 12V.  I can adjust the tension manually on the front panel and using the option "Contact instrument" in the tool "Measure and Automation", but not with the driver of the IVI.  Any help would be greatly appreciated.

  I tried to set the ÖVP at 20, but the pilot didn't like either.  And I could do it manually. This part is not included in the attached report.

  Here is my configuration:

  LabVIEW: 7.1

  hp66xxbc driver: not sure.

  Just run "HP6632B-Init-and-Set - voltage.vi.

  Here is the error I get:

  "Error 1074135024 occurred to hp66xxbc configuration OVP.vi.

  Possible reasons:
  Driver status: (Hex 0xBFFA0010) invalid value for the parameter or property.

  Secondary error: (Hex 0xBFFC0004) parameter 4 out of reach, or an error occurred when setting setting 4.

  "Development: OVP limit"

  Hello Mike,.

  It seems that the problem is possibly due to the deactivation of the query ID in any of your folders.  In many cases the specific driver IVI uses by default the model with the minimum of features and smaller beaches.  Do you have errors if you try to set the ÖVP to 2 volts?  If you still have a problem after activation ID query and try a smaller value of the ÖVP, please post an example with a minimum of code that reproduces the issue and doesn't use the wrapper to live and also include a capture OR the spy of the occurrence of the error.

  See you soon,.

  NathanT

• Variable set during step fails

  Hello!

  Is it possible to set a variable (or two) in one step, if the step fails?

  I looked at this thread: http://forums.ni.com/t5/NI-TestStand/Set-a-variable-in-a-post-expression/td-p/1186981 .

  that is quite similar to what I'm trying to do.

  I don't want to create a new step to achieve this. I know that I can't use the term Post to check if the step failed, because the condition Expression is evaluated after the phrase Post. The solution to the thread linked above has been to use the Condition Expression custom instead of the Expression Post, and I have the following to work:

  (Step.Result.Status == 'Pass')? (Locals.Passed = False): (Locals.Passed = True)

  But the problem I have here is that I want to write in a string and a variable number (error error code and text) instead of a Boolean value (Locals.Passed). How can I write about something else than a Boolean? Is this possible? Or do I have to create a new stage for each test step?

  It does not work:

  (Step.Result.Status == 'Pass')? (Locals.Error = 'No error'): (Locals.Error = 'Error')

  Kind regards

  Sindre

  Hello

  I have created an example of movie file that uses SequenceFilePostStepFailure to set local variables with an error message and the code depends on which steps failed.

  I've also included the steps to set the (currently skipped) Step.Result.Error because I think it's a nice alternative.

  Kind regards

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• DAQmx task start-up delay / quickly generate arbitrary output voltages

  Hello

  (Sorry, I m new to this forum and could not find a reasonable solution by using the search)

  I develop a c# multithreaded application that generates a waveform in the 'background' using output buffering simultaneously, captures the images via a firewire camera and treat them. I have a second channel DA free that I would use when debugging a marker in real-time so that I can check on an oscilloscope which is the relative condition of simultaneous processes, i.e. output a voltage of 1 V while treatment step 1, 2 Volts to processing step 2 etc. or I would be out a short spike at some critical point. This is done using a task as

  DA_Task_sgl = new Task();
  DA_Task_sgl. AOChannels.CreateVoltageChannel ("/ Dev1/ao0", "DA0" - MXVOLTAGE, MXVOLTAGE, AOVoltageUnits.Volts);
  DA_Task_sgl. Control (TaskAction.Verify);
  DA_Task_sgl. Timing.SampleTimingType = SampleTimingType.OnDemand;
  DA_Writer_sgl = new AnalogSingleChannelWriter (DA_Task_sgl. Stream);

  then, when I want to change the tension

  DA_Writer_sgl. WriteSingleSample (true blood);

  A similar technique worked pretty well using Traditional NI DAQ, but with NIDAQmx and the concept of task, it seems that a voltage of output value takes about 1.5 ms (also of time CPU) which is too slow in many cases. With Traditional NI DAQ two consecutive calls to AO_VWrite() may generate a COB with only a few µs endeavors instead. I guess that the delay in the NIDAQmx is mainly determined by start and stop work, etc.

  Is there a way to avoid all this (in NIDAQmx) and more direct access to the underlying hardware?

  (Please Don t tell me that it is a limitation of Windows, NOR-Trad code clearly shows that it was possible, clearly the thread may be interrupted during the output voltage, but is also my treatment, exactly what I want TO check with this technique, but that 1.5 ms the delay is still there!)

  (Currently used card PCI-6014 with NIDAQmx 9.x, but I think that it s not the card which is itself too slow, I can get the update rate Analog > 100 kHz on the string of voltage waveform via DMA)

  Thank you

  Joachim

  Hi fabwes,

  The snippet you posted on request AO.  This means that whenever you write we go and search equipment to generate tension.  Your assumption is correct, the slowness that you see is because of the job template.  Whenever you are calling WriteSingleSample the task is launched, the tension is out, and the task is stopped.  I suggest the following code:

  DA_Task_sgl = new Task();
  DA_Task_sgl. AOChannels.CreateVoltageChannel ("/ Dev1")

  ("/ ao0", "DA0" - MXVOLTAGE, MXVOLTAGE, AOVoltageUnits.Volts);
  DA_Task_sgl. Timing.SampleTimingType = SampleTimingType.OnDemand;

  DA_Writer_sgl = new AnalogSingleChannelWriter (DA_Task_sgl. Stream);

  DA_Task_sgl. Control (TaskAction.Start);

  DA_Writer_sgl. WriteSingleSample (false / * since we are already started, this parameter is essentially ignored * /, tension);

  This slight change gets the load to start the task of the road before start you writing.

• Module CVI written TestStand property, property value resets after the step execution.

  Hello

  I did a lot of research and find nothing relevant to the question that I have. I've created a DLL in CVI containing several functions I call TestStand. I also created a type of step customized for each function call. Every function in the DLL has a runtime version and a version edit-time. Time edition features each have a UI associated with them are called from teststand. Change these functions are placed in the custom under the heading "change" step step-type tab Before executing a sequence with these custom steps the edit-time user interface is launched to allow the user to input values that will be passed to the run function. originally, I tried to set up my functions as a 'post step' step in the step properties. However, the sequences would fail to run because the parameters of the step module was empty. Then, I selected CVI as the adapter in the step properties and specified a default module for each type. This filled the tab module settings step like I wanted. However, when I ran the sequence each function execution of measures was called twice, once for the stage of the post, and once for what was in the tab module I suppose. I then re-entered the types of step and deleted all the steps of the post office. I thought that all the problems have been resolved at this point, however, after doing some more extensive tests I always have a bug, I was unable to get rid of that.

  The problem is that two of my step types have to write data to current TestStand to execution after they ask an external device for IT. I know that the query works because my log text that generates the DLL displays the correct values. However, the data are not get rewritten on TestStand correctly. In the enforcement functions after checking the valid data has been returned, I try to write to TestStand using: "TS_PropertySetValNumber (seqContextCVI, NULL,"ThisContext.Step.ParameterValue.NumericParameter", 0, (double) ushortint);" »

  I checked that this call generates an error and also used the TS_PropertyExists method to check that I had the correct search string. These extract so I added then another command that reads the value written to TestStand two return immediately after to write it. I printed this in my log file and found that the value is written to the property of TS. So, the problem is that TestStand is defining the property to reset after the code module is running. How to prevent this?  

  Thanks for all comments, let me know if anything specified needs.

  Josh Meyer

  Well, I came to the conclusion that my 'problem' is not really a problem. I had a bit of a basic misunderstanding of the works of TestStand (I don't actually use it, I am writing just a code which will bring an existing one of the tools of the features inside the TS).

  in any case, what I learned is that these properties are retained (so you can set up a sequence, save it, re - open and be able to run it without any reconfiguration for example), when you write to a property when installing editting/sequence. The run time values are not preserved (if connected) because they are only required to carry out. For example, if a user calls one of these functions to extract value from a controller, they probably do so because they want to check the value, it's what they expect it to be. Rather than watching the value after execution (which is what I me assuming they would do), they would set up the step after step "read value" to test the value that it returned. This value is available in 'RunState.PreviousStep.valuename' in the downloaded step step "read value".

  Hope that I did not confuse anyone a lot, I'm completely new to TestStand.

• Default configuration for a step tab

  We have a system that has been installed at a couple of sites affiliated to the Japan and in Romania (we have developed in Australia).  It works on TestStand 4.2 with code written in LabVIEW 8.6 (although the Romanian site uses TS4.2.1 and LV2010).  We have many steps custom in a range of types file.

  One of the sites complained that when they add a few specific measures (digital limit Custom Tests, in particular) to a sequence, the tab displayed in the step settings pane is the tab "limits".  It would be more practical and more useful to display the tab Edit (the one that shows the buttons for Edit substeps).

  I realize it is just a matter of clicking on the relevant tab.  Also, I realize that once a file is saved, the tab selected last is established for each step when it is again open.  However, the customer is always right, so I need to see if it can be "fixed".

  Is there a way to set the default tab for a Test step of numerical limit to something other than the tab "limits"?

  Help files, Google and the pages NOR does not appear to be next on this issue.

  Thank you

  Geoff

  Hello

  There isn't a way to change which tab opens to a type of custom step. Sorry for the convenience, this may cause.

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• Not updated by Labview VI Step property

  Hello

  I am currently using 4 TS and LV 8.2 with Win7 Pro.

  I created a custom step which employs a lower Edit level.

  The lower Edit level name successfully a Labview vi, which allows the user to change the values.

  The intention is to copy the user values in the properties of the custom calling step, using the value property Value.vi of the library of Teststand.

  After that step is changed, the vi is closed and I check the step variables expected variables to be updated, but what I see in the Variables Panel does not always show the new property values of step.

  Called by the lower Edit level Labview vi receives the context of the sequence and the correct step property string name.

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  In addition, when the properties of the stage show the new value, the sequence containing the custom step does not indicate

  the need to save that is in front of my expectations, else how is remined user to save the changes?

  Thank you

  Gary.

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  I recommend most often to developers to interface with the EditSubstep modules using parameters.

  For an input parameter, I pass the current values of the step variables.

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  I declare this as my EditSubstep modules normally contain a button "Cancel". If the user presses that, I simply passes the output values that the module received as input values.

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  Hello!

  I would like to create VI to establish a scheme of the stage for 6 valves in operation.
  On this front, I imagined a table, where the markets are under another as rows in a table.

  Each step must be timed and the positions of the valve must be set. I need at least 30 steps, so it would be nice to create a table, with each line similar to this:

  

  I don't really know what is the best weight in this case. Copy paste 30 times seems to be a solution very amateur.

  Does anyone have any ideas?

  Thank you in advance!

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  Put what you show evidence of a cluster, and then make your table, a table of these clusters.

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