Problems with accessing my analog input from NIDAQ with MATLAB
matlan fail with the analoginput command : AI = analoginput('nidaq',1);
??? Error using ==> analoginput/analoginput
Error using ==> analoginput/analoginput
Failure to open requested data acquisition device. Classe non enregistrée
what i have to do ?
It is hard to determine exaclty what is causing that error with the information provided. Have you verified that your NI DAQ device is working properly on your machine, either through another program or through Measurement & Automation Explorer (MAX)? What version of NI-DAQ do you have installed on your machine? The following websites contain informatoin and links so that you can determine what version of NI-DAQ will work with Matlab and other issues that might be occurring:
http://digital.ni.com/public.nsf/websearch/1F8D330AA1DDC7448625699F000168D3?OpenDocument
http://digital.ni.com/public.nsf/websearch/158EAFCCFA09DFC286256B05000A423A?OpenDocument
You are probably using the MATLAB DAQ toolkit to perform these operations. The best bet is probably for you
to contact Mathworks to see if they have some example m files you can use or if they have documentation on exactly what is causing that error.
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I am getting a -50101 error when trying to get analog input from a compact rio
I am just doing the initial setup of my compactRIO system and have been able to successfully add the cRio in Max and then into a new project. I created a very simple VI with analog input that I am trying to read into an indicator, following one of teh tutorials. The module I am reading the input from is a cRio-9201. The input is voltage. I have already added the module to teh project under the FPGA, which is under the RIO in the project tree. Any ideas what I may be missing would be greatly appreciated!
ThanksThe 9201 C Series module needs to be created under the FPGA Target
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JMota -
Can I read more than 2 analog inputs from myDAQ?
Hello,
I am trying to read 3 voltage values. However, the myDAQ only has 2 analog inputs.
There are multi-meter ports in the myDAQ as well. Could I read the 3rd value via this port?
How would I read these values via the DAQ assit on labVIEW?
Thanks in advance.
YzhiHello Yzhi,
You can acquire from the DMM and the analog inputs using two parallel tasks. The simplest way is to configure one DAQ Assistant for the AI channels, and another DAQ Assistant for the DMM channel. Be aware that the DMM is a software-timed single-point measurement (no hardware waveform acquisition), so you can't tightly synchronize the DMM with the Analog Inputs.
Here is a screenshot demonstrating how to acquire from all three channels. You could also run the DMM in a separate loop so it doesn't slow down AI.
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Charles Y.
National Instruments
Attachments:
myDAQ acquire two AI and DMM.jpg 196 KB -
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If 10 out of 10 experts in any field say something is bad, you should probably take their opinion seriously.
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Prueba 1 Hooovahh Edit2.vi 765 KB -
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Thanks,
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Acquiring Analog Input from Multiple Channels in Labview
Hello,
i am working on a VI where i need to acquire signals from multiple channels in Labview using NI-9129.Initially i want to acquire contineous input signals (voltage and current) and display it on the graph.
Having looked at forum and Labview examples i tried to make an initail VI but i am not sure if the setup i made needs any modification to serve my purpose.I am fairly new to Labview software.
All i want is
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4.Log the data into excel file
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Thank You for having a look at my question.
Attachments:
Voltage-Current VI.vi 81 KBEngr_tech wrote:
i think i already have the tdms for data logging.as far as the tdms data logging is concerned,when i enable the logging mode to "read and log" the data logged inside the excel sheet would be seperate for current and voltage.?
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Yes, you are logging directly to a TDMS file. This is definately the best route for data logging from a DAQ. The currents and voltages will show up as different channels in the same group.
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There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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hello,
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Atten : Jeff or anyone =)
I had discretized my controller onto labview. And would like to feed the analog input from external into the PC(that the controller is implemented in). I do hv a DAQ card. The problem is I do not know how to link the analog input -> ADC -> controller -> DAC -> system. And i really believe labview hv functions to do it. But really confuse how should i do it. Could anyone pls advise me. ThanksDarren,
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Mark -
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Thanks
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at javax.swing.plaf.basic.BasicTextUI.paintSafely(BasicTextUI.java:723)
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at javax.swing.plaf.basic.BasicTextUI.update(BasicTextUI.java:849)
at javax.swing.JComponent.paintComponent(JComponent.java:752)
at javax.swing.JComponent.paint(JComponent.java:1029)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5146)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java :1515)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1446)
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at javax.swing.DefaultBoundedRangeModel.setValue(DefaultBoundedRangeModel.java:151 )
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at java.awt.Component.processEvent(Component.java:6146)
at java.awt.Container.processEvent(Container.java:2085)
at java.awt.Component.dispatchEventImpl(Component.java:4736)
at java.awt.Container.dispatchEventToSelf(Container.java:2167)
at java.awt.Component.dispatchMouseWheelToAncestor(Component.java:4886)
at java.awt.Component.dispatchEventImpl(Component.java:4622)
at java.awt.Container.dispatchEventImpl(Container.java:2143)
at java.awt.Component.dispatchEvent(Component.java:4566)
at com.mathworks.mde.editor.codepad.Codepad$2.mouseWheelMoved(Codepad.java:209)
at java.awt.Component.processMouseWheelEvent(Component.java:6462)
at java.awt.Component.processEvent(Component.java:6146)
at java.awt.Container.processEvent(Container.java:2085)
at java.awt.Component.dispatchEventImpl(Component.java:4736)
at java.awt.Container.dispatchEventImpl(Container.java:2143)
at java.awt.Component.dispatchEvent(Component.java:4566)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4621)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4311)
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at java.awt.Container.dispatchEventImpl(Container.java:2129)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4566)
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at java.awt.EventQueue.access$000(EventQueue.java:86)
at java.awt.EventQueue$1.run(EventQueue.java:639)
at java.awt.EventQueue$1.run(EventQueue.java:637)
at java.security.AccessController.doPrivileged(Native Method)
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at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlConte xt.java:98)
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at java.awt.EventQueue$2.run(EventQueue.java:651)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlConte xt.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:650)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:29 6)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:20 1)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Exception in thread "AWT-EventQueue-0" java.lang.NegativeArraySizeException
at org.netbeans.editor.DrawGraphics$GraphicsDG.flush(DrawGraphics.java:655)
at org.netbeans.editor.DrawGraphics$GraphicsDG.flush(DrawGraphics.java:522)
at org.netbeans.editor.DrawGraphics$GraphicsDG.setBuffer(DrawGraphics.java:756)
at org.netbeans.editor.DrawEngine.draw(DrawEngine.java:1116)
at org.netbeans.editor.DrawEngineLineView.paint(DrawEngineLineView.java:233)
at org.netbeans.lib.editor.view.GapBoxViewChildren.paintChildren(GapBoxViewChildre n.java:783)
at org.netbeans.lib.editor.view.GapBoxView.paint(GapBoxView.java:1463)
at org.netbeans.lib.editor.view.GapDocumentView.paint(GapDocumentView.java:231)
at org.netbeans.editor.DrawEngineDocView.paint(DrawEngineDocView.java:314)
at org.netbeans.editor.view.spi.LockView.paint(LockView.java:363)
at javax.swing.plaf.basic.BasicTextUI$RootView.paint(BasicTextUI.java:1423)
at javax.swing.plaf.basic.BasicTextUI.paintSafely(BasicTextUI.java:723)
at javax.swing.plaf.basic.BasicTextUI.paint(BasicTextUI.java:870)
at javax.swing.plaf.basic.BasicTextUI.update(BasicTextUI.java:849)
at javax.swing.JComponent.paintComponent(JComponent.java:752)
at javax.swing.JComponent.paint(JComponent.java:1029)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5146)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java :1515)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1446)
at javax.swing.RepaintManager.paint(RepaintManager.java:1260)
at javax.swing.JComponent.paintForceDoubleBuffered(JComponent.java:1065)
at javax.swing.JViewport.blitDoubleBuffered(JViewport.java:1612)
at javax.swing.JViewport.windowBlitPaint(JViewport.java:1573)
at javax.swing.JViewport.setViewPosition(JViewport.java:1118)
at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.vsbStateChanged(BasicScrollPan eUI.java:1029)
at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.stateChanged(BasicScrollPaneUI .java:1018)
at javax.swing.DefaultBoundedRangeModel.fireStateChanged(DefaultBoundedRangeModel. java:348)
at javax.swing.DefaultBoundedRangeModel.setRangeProperties(DefaultBoundedRangeMode l.java:285)
at javax.swing.DefaultBoundedRangeModel.setValue(DefaultBoundedRangeModel.java:151 )
at javax.swing.JScrollBar.setValue(JScrollBar.java:446)
at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.mouseWheelMoved(BasicScrollPan eUI.java:964)
at javax.swing.plaf.basic.BasicScrollPaneUI$MouseWheelHandler.mouseWheelMoved(Basi cScrollPaneUI.java:525)
at com.apple.laf.AquaScrollPaneUI$XYMouseWheelHandler.mouseWheelMoved(AquaScrollPa neUI.java:38)
at java.awt.Component.processMouseWheelEvent(Component.java:6462)
at java.awt.Component.processEvent(Component.java:6146)
at java.awt.Container.processEvent(Container.java:2085)
at java.awt.Component.dispatchEventImpl(Component.java:4736)
at java.awt.Container.dispatchEventToSelf(Container.java:2167)
at java.awt.Component.dispatchMouseWheelToAncestor(Component.java:4886)
at java.awt.Component.dispatchEventImpl(Component.java:4622)
at java.awt.Container.dispatchEventImpl(Container.java:2143)
at java.awt.Component.dispatchEvent(Component.java:4566)
at com.mathworks.mde.editor.codepad.Codepad$2.mouseWheelMoved(Codepad.java:209)
at java.awt.Component.processMouseWheelEvent(Component.java:6462)
at java.awt.Component.processEvent(Component.java:6146)
at java.awt.Container.processEvent(Container.java:2085)
at java.awt.Component.dispatchEventImpl(Component.java:4736)
at java.awt.Container.dispatchEventImpl(Container.java:2143)
at java.awt.Component.dispatchEvent(Component.java:4566)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4621)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4311)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4212)
at java.awt.Container.dispatchEventImpl(Container.java:2129)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4566)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:680)
at java.awt.EventQueue.access$000(EventQueue.java:86)
at java.awt.EventQueue$1.run(EventQueue.java:639)
at java.awt.EventQueue$1.run(EventQueue.java:637)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlConte xt.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlConte xt.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:653)
at java.awt.EventQueue$2.run(EventQueue.java:651)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlConte xt.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:650)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:29 6)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:20 1)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) -
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