LabVIEW code for two daq cards

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• Need help with LabVIEW code for motor control.

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  My name is Sasi. I'm a grad student BME working on my thesis topic of assessment for back pain spine implants. To do this, I'm building a test machine that would apply pure moments of a specimen of the spinal column. I use LabVIEW 8.5 to implement the control of a brushless AC servo motor. My requirement is

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  Hi Sonia,.

  I took a quick glance to your problem and I think I have a solution for you.  I certainly agree with the suggestion of the use of parallel loops Lynn.  This will allow the portion DAQmx run uninhibited by the part of the motion, and vice versa.  In addition, you need only perform an iteration of the loop of the movement whenever the voltage level exceeds a threshold.  Thus, by performing an iteration on the code of movement in the same loop are you iterate over DAQmx code, you essentially waste processor.

  I created a VI that should do what you are wanting.  I tested it on me and it works very well.  You have a tweak a few things to apply to your system (such as motion Council DAQmx and physical channel ID, etc.).  I used two parallel loops and event programming.  Basically, the loop of movement starts the engine turns at the specified speed.  Once the engine is running, he expects the DAQmx loop to tell him that the voltage value has crossed the threshold.  When the voltage value exceeds the maximum threshold (I put a value slightly less than 10 to jitter and saturation), the DAQmx loop indicates the loop of the motion that it may end its iteration.  The motion loop stops the motion, causes a reversal and repeats the motion.  Once the movement has begun, he expects the DAQmx loop once again to tell him that a threshold was held, but this time, it's looking for a minimum threshold.  I used "Occurrences" to implement the event programming in LabVIEW.

  I've commented the code pretty thoroughly, so I hope that comments will answer all remaining questions.  The advantage of using programs that focus on the event for this is that you save time processor, and your movement is more closely synchronized with the DAQmx.  Instead of one iteration of the loop of movement as fast as you can, updates every hour, you just put in pause and wait for the other loop to tell you when to start up again.  Meanwhile, the processor doesn't have to worry about an iteration of this loop over and over again.  In addition, when the accident occurs, you catch him immediately, instead of having to wait until the next iteration.  Thus, you are more closely synchronized with the DAQmx code portion.

  I hope this will help you.  Please report if you have any questions about the code or its implementation.  Good luck!

  
  

• Recommendation for the DAQ card

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  I m currently developing a project in a gas control, where I need Messure tempertures and be able to open and close a valve.

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  I was hoping if someone could help me choose a card of data acquisition for two things. where she has 4 analog for

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  Thermocouples type K are...

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  Sincerely

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  Hi Luis,.

  How current are required by the relay? Is the combination of a cDAQ-9174and NI 9211 , NI 9401 sound like it might meet your needs? You can also focus on devices that have integrated relays, such as the NI 9481 or PCI-652 x.

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  Thank you!

  Hello Kaladin,

  I'll take a look at the link below to see the cause of the error, but also some common things suggested to try.

  http://digital.NI.com/public.nsf/allkb/FEF778AD990D5BD886256DD700770103

  Best wishes!

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  I have a JSON file with more than 200 records.

  I want that each record to be active button with unique actions.

  The code is the following:

  $.getJSON ("content.json",

  {function (Data)}

  for (var i = 0; i < 200; i ++) {}

  var s = sym.getSymbol("base").createChildSymbol ("template", "CONT");

  s.getSymbolElement ();

  s.Element.attr ('id', 'symbol' + i);

  s. $("imageholder") .css ({'background-image': "url ('" + data [i].) "}) (image_+_«_'_»)});

  s. $("imageholder") .data ('myIndex', i);

  s.$("imageHolder"). Data('title',Data[i].) (Name)

  s.. Click$ ("imageholder") ("click", Function {}

  If ($(this) .data ("myIndex") == 0) {}

  WB = 10;

  SYM.$("#symbol0"). Show();

  SYM.$("#Symbol1"). Hide();

  SYM.$("#Symbol2"). Hide();

  SYM.$("#symbol3"). Hide();

  sym.getComposition () .getStage ().getSymbol('placer').$("holder").css ({'background-image': "url (" + $(this).data('Large') + ")"});

  sym.getComposition () .getStage ().getSymbol('placer').$("holdertxt").html ($(this) .data ('the kid'));

  If (WB == 10) {}

  sym.getSymbol("#symbol0").$("rect").animate ({opacity:1}, 700);

  };

  }

  ElseIf ($(this) .data ("myIndex") == 1) {}

  WB = 11;

  SYM.$("#symbol0"). Hide();

  SYM.$("#Symbol1"). Show();

  sym.getComposition () .getStage ().getSymbol('placer').$("holder").css ({'background-image': "url (" + $(this).data('Large') + ")"});

  sym.getComposition () .getStage ().getSymbol('placer').$("holdertxt").html ($(this) .data ('the kid'));

  If (WB == 11) {}

  sym.getSymbol("#symbol1").$("rect").animate ({opacity:1}, 700);

  };

  }

  });

  s. $("imageholder") .mouseout ("mouseout/mouseouthandler()", function (e) {}

  If ($(this) .data ("myindex") == 0 & & WB! = 10) {}

  sym.getSymbol("#symbol0").playReverse ("selectend");

  }

  ElseIf ($(this) .data ("myindex") == 1 & & WB! = 11) {}

  sym.getSymbol("#symbol1").playReverse ("selectend");

  }

  }

  });

  s. $("imageholder") .mouseout ("mouseout/mouseouthandler()", function (e) {}

  If ($(this) .data ("myindex") == 0 & & WB! = 10) {}

  sym.getSymbol("#symbol0").play ("selectstart");

  }

  ElseIf ($(this) .data ("myindex") == 1 & & WB! = 11) {}

  sym.getSymbol("#symbol1").play ("selectstart");

  }

  });

  }

  });

  How is possible to place an each command or something else for not writing for each Index and for each function actions?

  Now I'm writing for each function (passing of the mouse, click, mouseout/mouseouthandler()) the actions that each record in the JSON must do.

  Can someone help me?

  Based on your code above, I made the following assumptions:

  1. You have shown the code for two values of i (0 and 1) and want a similar code for the rest
  2. Two managers mouseout/mouseouthandler() in the code above is a typo, one of them is supposed to be a mouseover (according to the description at the bottom). In the solution, I will propose, I guess that one was supposed to be a manager of mouseover
  3. BM is a global variable and values range from 10, 11, 12... 10 + n - 1. Please check the code once though, I think that there is a logical problem with the closure, you create around WB in mouseout/mouseouthandler() handlers. I can't identify the intention if the proposed solution will be based on your code above.

  Another bug in the code is in the way you join managers:

  s.. Click$ ("imageholder") ("click", Function {}) must be changed to: s.$("imageholder"). on ("click", Function {})

  and still other managers.

  You can use the following to simplify your code:

  $.getJSON("content.json", function (data) {
       for (var i = 0; i < data.length; i++) {
            var s = sym.getSymbol("base").createChildSymbol("template", "conts");
            var e = s.getSymbolElement(); 
            e.attr('id', 'symbol' + i); 
            s.$("imageholder").css({ "background-image": "url('" + data[i].image + "')" });
            s.$("imageholder").data('myIndex', i);
            s.$("imageholder").data('title', data[i].name); 
  
            s.$("imageholder").on("click", function (e) {
                 WB = 10 + i;
                 sym.$("#symbol0").show();
                 sym.$("#symbol1").hide();
                 sym.$("#symbol2").hide();
                 sym.$("#symbol3").hide();
                 sym.getComposition().getStage().getSymbol('placer').$("holder").css({ "background-image": " url(" + $(this).data('Large') + ")" });
                 sym.getComposition().getStage().getSymbol('placer').$("holdertxt").html($(this).data('title'));
                 sym.getSymbol("#symbol0").$("rect").animate({ opacity: 1 }, 700);
            });
  
            s.$("imageholder").on("mouseover", function (e) {
                 //Looks like a logical bug, please double check.. I don't know how you are controlling WB from outside
                  if(WB != 10 + i) {
                      sym.getSymbol("#symbol0").playReverse("selectend");
                  }
           }); 
  
            s.$("imageholder").on("mouseout", function (e) {
                 //Looks like a logical bug, please double check.. I don't know how you are controlling WB from outside
                 if (WB != 10 + i) {
                      sym.getSymbol("#symbol0").play("selectstart");
                 }
            });
       }
  });
  

  Another option would be to set up your event handlers in the symbol definition. The advantage is that all instances would automatically inherit the behavior. You just need to understand how to set the code. For example, in your case, you can attach the following click on Manager in the symbol itself imageholder element:

  var i = sym.$("imageholder").data('myIndex');  //You will be setting the data on the instance while creating the instance. Rest of the code can use this as a param
  WB = 10 + i; //Assuming WB to be available, change the logic accordingly
  sym.$("#symbol0").show();
  sym.$("#symbol1").hide();
  sym.$("#symbol2").hide();
  sym.$("#symbol3").hide();
  sym.getComposition().getStage().getSymbol('placer').$("holder").css({ "background-image": " url(" + $(this).data('Large') + ")" });
  sym.getComposition().getStage().getSymbol('placer').$("holdertxt").html($(this).data('title'));
  sym.getSymbol("#symbol0").$("rect").animate({ opacity: 1 }, 700);
  

  The code does not work as it is, but I hope it helps you move forward and you are able to achieve what you wanted. Let us know if you encounter other problems.

  DIA-

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  Hello

  I am a beginner in LabView programming. I have a 32 channels base PCI card DAQ (i.e. PCI-1602 of the manufacturer, ICPDAS) and I want it to interface with Labview 8.5.

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  Please provide some tutorial above mentioned the problem to interface.

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  Waqar123 wrote:

  Hello

  I am a beginner in LabView programming. I have a 32 channels base PCI card DAQ (i.e. PCI-1602 of the manufacturer, ICPDAS) and I want it to interface with Labview 8.5.

  So how cards DAQ in Labview 8.5, which are manufactured by other suppliers that NEITHER? Should I DAQmx (or some other driver) for that? You will need the drivers from the manufacturer, of the Board of Directors.  In your case, "ICPDAS.

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  According to what you do with the DAQ cards, they can do the job however, from experience, there are some functions that I could achieve with the cards NOR that I couldn't with 3rd-party maufacturers.  This does not mean that this is your case. However, it is worth noting that it took me a while to understand why the code has worked with a single data acquisition card (NOR) but not another (Non-OR).

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