Angle Encoder for Position measurement on SC-6281

Hi,
I'm trying to connect a quadrature angle encoder with 3600 ppr to the general purpose counter/timer of a M-Series SC6281 DAQmx board. We use C and have tried using the AngularPosition-Buff.c example code but to no avail. We simply want the counter to tell us the angle of the encoder at any given time....can you help ? We've wired up the encoder correctly (i.e. A connected to PFI 8, B connected to PFI 10 and Z connected to PFI 9) on an SCB-68 connecter block. The C example works as such but it sems to require an extyernal clock sample ? Why is this if we're only counting pulses ?
We also need to determine direction so any help anyone can provide will be gratly appreciated.
Cheers, Shaun.

Just to expand a bit: We have succeeded in generating a continuous pulse train on ctr1 ?(using DigPulseTrain-Cont.c example) and we have been able to feed this into ctr2 and count it (using the BuffSemi-Period-Finite.c example)
We have also managed to feed the pulse train from ctr1 into ctr2 and use it as the sample clock for the AngularPosition-Buff-Cont.c example. The problem is we're getting gobbledygook back as results.
Can anyone help here ?
Here's our resulting code:
Attachments:
DigPulseTrain-Cont.c ‏6 KB

Similar Messages

Using a Counter(PC-TIO-10) to Perform Quadrature Encoder Buffered Position Measurement in Visual C++

I have Driver Ni-Daq 6.9 and Using a Counter to Perform Quadrature Encoder Buffered Position Measurement in Visual C++ 6.0
(I think Ni-Daq not support PC-TIO-10 because card not support pulg&play, you can hint me driver for support this card. ) and i want example program for read counter. i use Visual C++ for run,i don't use Measurement Studio.

NI-DAQ 6.9 supports the PC-TIO-10.
I attached an example that will show you how to do it in CVI (ANSI C).
Attachments:
Cviencod.zip ‏19 KB

3-Channel angular position measurement

Hi,
I have the PXI-6230 available in my PXI system. What I am trying to achieve is to read the outputs of a stepper motor driver and determine the corresponding angular position and direction (i.e.. like a stepper motor simulator). The driver outputs 3 pulse trains (3 coils). I am wondering if it is possible to use the counters on the PXI-6230 for this application? I've read some info on the M-Series Counter X1/X2/X4 Encoding for position measurements. But such methods require only 2 input channels A & B to detect the pulse counts and direction. Is there a workaround to apply this encoding method for my application? Any help/advise is greatly appreciated...

Dunno if there are new ways in newer DAQmx versions since I'm not near a machine I can double-check. Meanwhile,
I'll describe a way I've often handled it:
1. First of all, the M-series counters have true quadrature decoding built into the board so that direction is handled properly. When you move one direction the count increments and when you move the other, the count decrements.
2. I don't know of a method to "retrieve" the direction itself with a software query. You might need to remember (think "shift register") the previously queried position so you can figure out direction yourself after retrieving the current position.
3. Most of the time I read my counter values as u32 datatypes rather than as scaled floating point values. Kind of an old-school habit since I "grew up" under the older "traditional NI-DAQ" driver. However there's one little gotcha to look out for.
Since most tasks start with default count value of 0, it's very common for quadrature motion measurements to decrement below 0. However, u32's cannot express negative numbers so the count will suddenly jump from 0 to 4 trillion something (specifically, 2^32 - 1). If you pass any u32 readings through an i32 data conversion function (numeric-->conversion palette), the bits get reinterpreted in the expected way so that a decrement from 0 reads as -1.
-Kevin P

Incremental encoder, velocity, position and direction

hi,
A incremental encoder(With channel A and B)
I know that the velocity is proportionate with the frequence of the pulses and we can find the position with a simple edge count. But it's a bit difficult to find out the rotating direciton even if the principe is very evident.
are there any exemples for these kinds of application?

PCI-MIO-16E-1 --> DAQ-STC --> see paragraphs concerning DAQ-STC in this
file
Unfortunately I have never used a SC-2345. But after a short overview of its specifications, it seems that you will need one SCC-FT01 to connect the A channel to the counter source and the other to connect B to the auxiliary line that will set the direction. See schematic in the file mentionned above. So your hardware will allow you to take this measurement.
See this example to see how to configure a DAQ-STC counter for position measurement.
1) Simple event counting
2) Up/down counting. Direction is given by hardware --> auxiliary line of the counter (DIO6 for counter 0 and DIO7 for counter 1)
3) Start the counter
4) Read periodically the counter value
5) Reset the task when finished
Don't be troubled by the BNC-2120. Use your SC-2345 instead. Obviously you will need to adapt the number of encoder pulses/rev to suit your encoder.
Add a shift register to store the position from one iteration to the other and compute the difference to determine the direction.
If you want to add the velocity, than you have two options :
1) If the accuracy must not be very high, then you can compute it (delta position / loop time).
2) If you need high accuracy, then it will necessary to use the second counter to measure the frequency of channel A. In order to avoid errors due to vibrations it is recommended to use the LS7084 in this case.
As you can see here, there are 3 methods to measure a frequency.
Obviously, the examples will not work with your DAQ-card because the 660X is a NI-TIO type counter.
If you want to measure the velocity at the same time than the position, then you will need to use the first method (Inverse period measurement) because the others will need 2 counters. (your card has only 2 counters and one is already used for the position measurement).
There is an example of period measurement for DAQ-STC that ships with LV (Measure Period (DAQ-STC).vi).
1) Single period measurement
2) Source specification --> internal timebase
3) Gate specification --> channel A
4) Start task
5) Wait for one pulse on Gate. I recommend to add a timeout to not enter in an endless wait if there is no pulse.
6) Read number of pulses of the internal timebase.
7) Check if counter overflow
8) Reset task
You will need to combine both examples in one vi.
I hope this is clear enough to help you.

How to use pci-6230 as position measure

Can i use the following method to realiate position measure function?
* gpct_ex7.cpp
* Quadrature encoding
* Read a quadrature encoder using counter 0. The counter is configured for X4 mode
* The initial value is loaded into the counter from the Load A register.
* Attach the quadrature encoder's A signal to pin 2 (PFI 39) and the B signal to
* pin 40 (PFI 37).
* $DateTime: 2006/07/27 23:51:45 $
#include "stdio.h"
#include "osiBus.h"
#include "tTIO.h"
void test(iBus *bus);
void initMite(iBus *bus);
int main()
iBus* bus;
bus = acquireBoard("PXI0::0::INSTR");
if(bus == NULL){
 printf("Error accessing the PCI device. Exiting.\n");
 return 1;
//Intitialise Mite Chip.
initMite(bus);
//Calling test function
test(bus);
releaseBoard(bus);
return 0;
//Tell the MITE to link the BAR1 address to the DAQ Board
//You must initialize the MITE before you write to the rest of the PCI board
void initMite(iBus *bus)
 tAddressSpace bar0;
u32 physicalBar1;
//Skip MITE initialization for PCMCIA boards
//(which do not have a MITE DMA controller)
if(!bus->get(kIsPciPxiBus,0)) return;
bar0 = bus->createAddressSpace(kPCI_BAR0);
//Get the physical address of the DAQ board
physicalBar1 = bus->get(kBusAddressPhysical,kPCI_BAR1);
//Tell the MITE to enable BAR1, where the rest of the board's registers are
bar0.write32(0xC0, (physicalBar1 & 0xffffff00L) | 0x80);
 //bar1 = bus->createAddressSpace(kPCI_BAR1);
bus->destroyAddressSpace(bar0);
void test(iBus *bus)
tAddressSpace cardSpace;
tTIO *board;
cardSpace = bus->createAddressSpace(kPCI_BAR1);
board = new tTIO(cardSpace);
//Reset
board->G01_Joint_Reset_Register.writeG0_Reset(1);
//Disarm
board->G0_Command_Register.writeG0_Disarm(1);
//load initial value of 0
board->G0_Load_A_Registers.writeG0_Load_A(0x00000000);
board->G0_Command_Register.writeG0_Load(1);
//set the counting mode to quadrature encoding X4
board->G0_Counting_Mode_Register.setG0_Encoder_Counting_Mode(3);
board->G0_Counting_Mode_Register.writeG0_Index_Phase(3);
//set source to the internal timebase (20 MHz)
board->G0_Input_Select_Register.writeG0_Source_Select(0);
//set gate
board->G0_Input_Select_Register.writeG0_Gate_Select(2);
board->G0_Mode_Register.writeG0_Gate_Polarity(0);
board->G0_Mode_Register.writeG0_Gating_Mode(2);
board->G0_Mode_Register.writeG0_Trigger_Mode_For_Edge_Gate(3);
//set counting direction to Gate IO connector
board->G0_Command_Register.writeG0_Up_Down(2);
//arm counter
printf("counter value is 0x%08lx\n",
 board->G0_Save_Registers.readRegister());
board->G0_Command_Register.writeG0_Arm(1);
//delay long enough for the quadrature encoder to turn a few times
 long int i,j;
 printf("waiting...\n");
 for(i=0;i<1000000;i++)
 for(j=0;j<3000;j++)
//read counter value
//Use this method to read the value of an armed counter
//during non-buffered counting. Since the value of the counter may
//change during the read, we make sure that the value is stable.
unsigned long counterValue1, counterValue2;
counterValue1 = board->G0_Save_Registers.readRegister();
counterValue2 = board->G0_Save_Registers.readRegister();
if(counterValue1 != counterValue2)
 counterValue1 = board->G0_Save_Registers.readRegister();
printf("counter value is now 0x%08lx\n",counterValue1);
//Disarm
board->G0_Command_Register.writeG0_Disarm(1);
delete board;
bus->destroyAddressSpace(cardSpace);
when this sentence "board->G0_Load_A_Registers.writeG0_Load_A(0x00000000);" is excute i cannt use AO function again,can anybody tell me why? and there is another question

This used to be a problem with Excel 2003 though I thought it had been fixed with the more recent versions. I've only seen this issue when using named sets in a calculated measure and not when the set is defined within the calculated measure and that's corrected
by declaring EXISTING before the named set reference as below.
SET [Member Descendants] AS
[Calendar].[By Year - Quarter - Month].CurrentMember.CHILDREN
MEMBER [Measures].[Estimate] AS
IIF(
ISLEAF([Calendar].[By Year - Quarter - Month].currentmember),
IIF(
1=1, // Simplified for examples sake
[Measures].[Actual],
[Measures].[Budget]
SUM(
EXISTING [Member Descendants],
[Measures].[Estimate]
EXISTING will force the named set to be evaluated with the context of each cell evaluation.
Martin Mason Wordpress Blog

Looping through an array to get the index for each measure in a combo box

Hi folks,
I am working on a web application that has two combo boxes, one for year (called yearcombo) and for measures (called myURL) for that selected year, and also two radiobuttons (in radioBtnGroup). I have two years and a bunch of measure for each year. I have a map tool tip that when you mouse over the county you see a measure for that specific year. However I have a bunch of measures for each year and I want to be able to loop through the measures (which are in an array collection inside a combobox) so my "if" expression can find every selectedIndex and bring me the tool tip for that selected measure for that selected radio button. Right now I would have to create if statements for each measure (each selectedIndex inside the myURL combobox)and each radiobutton (inside the radioBtnGroup) instead of creating a if expression to get a map tip tool for each measure. I know I would have to create a loop to search for these indexes and enter that in the if expression and also change the graphic.attributes to reflect the right measure or index selected. Do you API for Flex wizards can give me any tips on how to code this according to my code below ? Any help is greatly appreciated! (the print scree is attached)
Below is the code snippet:
if (yearcombo.selectedItem.year == "2007" && myURL.selectedIndex == 0 && radioBtnGroup.selectedValue == 0)
fLayer.definitionExpression = "DATA_YEAR_TXT like '2007'"
var graphic:Graphic = Graphic(event.currentTarget);
graphic.symbol = mouseOverSymbol;
var htmlText:String = graphic.attributes.htmlText;
var textArea:TextArea = new TextArea();
try{
textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForDirIndOut.toString()
myMap.infoWindow.content=textArea
myMap.infoWindow.label = graphic.attributes.NAME;
myMap.infoWindow.closeButtonVisible = false;
myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
catch(error:Error) {
trace("Caught Error: "+error);
And below is the combo boxes with the arrays
<mx:FormItem label="Year :" >
<mx:ComboBox id="yearcombo" selectedIndex="0" labelField="label" width="100%" change="changeEvt(event)" >
<mx:ArrayCollection id="year" >
<fx:Object label="2007" year="2007" />
<fx:Object label="2009" year="2009" />
</mx:ArrayCollection>
</mx:ComboBox>
</mx:FormItem>
<mx:FormItem label="Measure:">
<mx:ComboBox id="myURL" selectedIndex="8" width="80%" mouseOver="clickEv2(event)" close="closeHandler(event)">
<mx:ArrayCollection id="measures" >
<fx:Object id="forindout07" labeltext="2007 Forestry Industry Output" label="Forestry Industry Output " value="RADIO_BUTTONS/TFEI_07_forest_industry_output" year="2007" />
<fx:Object id="foremp07" label="2007 Forestry Employment " value="RADIO_BUTTONS/TFEI_07_forest_employment" year="2007" />
<fx:Object id="forlabinc07" label="2007 Forestry Labor Income " value="RADIO_BUTTONS/TFEI_07_forest_labincome" year="2007" />
<fx:Object id="forindbustax07" label="2007 Forestry Indirect Business Tax" value="RADIO_BUTTONS/TFEI_07_forest_business_tax" year="2007" />
<fx:Object id="forindout09" label="Forestry Industry Output " value="RADIO_BUTTONS/TFEI_09_forest_industry_output" year="2009" />
<fx:Object id="foremp09" label="2009 Forestry Employment " value="RADIO_BUTTONS/TFEI_09_forest_employment" year="2009" />
<fx:Object id="forlabinc09" label="2009 Forestry Labor Income " value="RADIO_BUTTONS/TFEI_09_forest_labincome" year="2009" />
<fx:Object id="forindbustax09" label="2009 Forestry Indirect Business Tax" value="RADIO_BUTTONS/TFEI_09_forest_business_tax" year="2009" />
<fx:Object id="blank" label=" " />
</mx:ArrayCollection>

And here is the entire code
<?xml version="1.0" encoding="utf-8"?>
<mx:Application
 xmlns:fx="http://ns.adobe.com/mxml/2009"
 xmlns:s="library://ns.adobe.com/flex/spark"
 xmlns:mx="library://ns.adobe.com/flex/mx"
 xmlns:esri="http://www.esri.com/2008/ags"
 paddingBottom="8" paddingLeft="8"
 paddingRight="8" paddingTop="8"
 backgroundColor="0xffffff"
 layout="vertical" >
 
<fx:Declarations>
 <esri:SimpleFillSymbol id="mouseOverSymbol" alpha="0.5" color="0x808080">
 <esri:SimpleLineSymbol width="0" color="#000000"/>
 </esri:SimpleFillSymbol>
 <esri:SimpleFillSymbol id="defaultsym" alpha="0.01" color="#E0E0E0" >
 <esri:SimpleLineSymbol width="1" color="#000000"/>
 </esri:SimpleFillSymbol>
 
</fx:Declarations>
 <fx:Script>
 <![CDATA[
 import com.esri.ags.Graphic;
 import com.esri.ags.SpatialReference;
 import com.esri.ags.esri_internal;
 import com.esri.ags.events.GraphicEvent;
 import com.esri.ags.geometry.Extent;
 import com.esri.ags.layers.ArcGISDynamicMapServiceLayer;
 import com.esri.ags.symbols.SimpleFillSymbol;
 import com.esri.ags.symbols.SimpleLineSymbol;
 import flash.utils.flash_proxy;
 import mx.collections.ArrayCollection;
 import mx.controls.Alert;
 import mx.controls.RadioButton;
 import mx.controls.TextArea;
 import mx.events.DropdownEvent;
 import mx.events.ItemClickEvent;
 import mx.rpc.Fault;
 import mx.rpc.events.FaultEvent;
 import flash.display.Sprite;
 import flash.events.ErrorEvent;
 import flash.events.MouseEvent;
 private function closeHandler(evt:DropdownEvent):void {
 myLabel.text = ComboBox(evt.target).selectedItem.labeltext;
 private function loadLayerName():void
 myLegend.layers = null;
 layerPanel.removeAllChildren();
 //loop through each layer and add as a radiobutton
 for(var i:uint = 0; i < (dynamicLayer.layerInfos.length); i++)
 var radioBtn:RadioButton = new RadioButton;
 radioBtn.groupName = "radioBtnGroup";
 radioBtn.value = i;
 radioBtn.label = dynamicLayer.layerInfos[i].name;
 if (dynamicLayer.layerInfos[i].name == "Direct Impact (Million $)")
 radioBtn.label = "Direct Impact";
 else if (dynamicLayer.layerInfos[i].name == "Total Impact (Million $)")
 {radioBtn.label = "Total Impact";
 else if (dynamicLayer.layerInfos[i].name == "Total Impact (Jobs)")
 {radioBtn.label = "Total Impact";
 else if (dynamicLayer.layerInfos[i].name == "Direct Impact (Jobs)")
 {radioBtn.label = "Direct Impact";
 else
 {radioBtn.visible= false;
 layerPanel.addChild(radioBtn);
 /* myDividerBox.getDividerAt(0).visible = false; */
 //set the visible layer the first radio button
 radioBtnGroup.selectedValue = 0;
 dynamicLayer.visibleLayers = new ArrayCollection([0]);
 myLegend.layers = [dynamicLayer];
 myLegend.visible = true;
 private function radioClickHandler(event:ItemClickEvent):void
 myLegend.layers = null;
 // update the visible layers to only show the layer selected
 dynamicLayer.visibleLayers = new ArrayCollection([event.index]);
 myLegend.layers = [dynamicLayer];
 private function changeEvt(event:Event):void {
 if (yearcombo.selectedItem.year == "2007")
 measures.filterFunction=filter1
 measures.refresh()
 myURL.dataProvider=measures
 else if (yearcombo.selectedItem.year == "2009")
 measures.filterFunction=filter2
 measures.refresh();
 public function filter1(item:Object):Boolean
 if (item.year=="2007") return true
 else return false
 public function filter2(item:Object):Boolean
 if (item.year=="2009") return true
 else return false
 private function clickEvt(event:Event):void {
 if (yearcombo.selectedItem.year == "2007")
 measures.filterFunction=filter3
 measures.refresh()
 myURL.dataProvider=measures
 else if (yearcombo.selectedItem.year == "2009")
 measures.filterFunction=filter4
 measures.refresh();
 public function filter3(item:Object):Boolean
 if (item.year=="2007") return true
 else return false
 public function filter4(item:Object):Boolean
 if (item.year=="2009") return true
 else return false
 private function clickEv2(event:Event):void {
 if (yearcombo.selectedItem.year == "2007")
 measures.filterFunction=filter5
 measures.refresh()
 else if (yearcombo.selectedItem.year == "2009")
 measures.filterFunction=filter6
 measures.refresh();
 else if (yearcombo.selectedItem.year == 2007 && myURL.selectedIndex==8)
 myLegend.layers = null;
 layerPanel.removeAllChildren();
 public function filter5(item:Object):Boolean
 if (item.year=="2007") return true
 else return false
 public function filter6(item:Object):Boolean
 if (item.year=="2009") return true
 else return false
 /* IF YOU WANT TO INCLUDE OTHER VALUES IN THE MAP TOOLTIP LIKE COUNTY NAME AND THE LABEL OF THE SELECTED ITEM
 if (myURL.selectedIndex==0)
 myTextArea.htmlText = "County: " + gr.attributes.NAME + "\n"
 + "Measure: " + myURL.selectedItem.label + gr.attributes.ForDirIndOut.toString()
 public function fLayer_graphicAddHandler(event:GraphicEvent):void
 event.graphic.addEventListener(MouseEvent.MOUSE_OVER, onMouseOverHandler);
 event.graphic.addEventListener(MouseEvent.MOUSE_OUT, onMouseOutHandler);
 public function onMouseOverHandler(event:MouseEvent):void
 if (yearcombo.selectedItem.year == "2007" && myURL.selectedIndex == 0 && radioBtnGroup.selectedValue == 0)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2007'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForDirIndOut.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2007" && myURL.selectedIndex == 0 && radioBtnGroup.selectedValue == 1)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2007'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForTotImpIndOut.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2007" && myURL.selectedIndex == 1 && radioBtnGroup.selectedValue == 0)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2007'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForDirEmp.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2007" && myURL.selectedIndex == 1 && radioBtnGroup.selectedValue == 1)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2007'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForTotImpEmp.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2007" && myURL.selectedIndex == 2 && radioBtnGroup.selectedValue == 0)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2007'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForDirLabInc.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2007" && myURL.selectedIndex == 2 && radioBtnGroup.selectedValue == 1)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2007'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForTotImpLabInc.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2007" && myURL.selectedIndex == 3 )
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2007'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForIndirBusTax.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2009" && myURL.selectedIndex == 0 && radioBtnGroup.selectedValue == 0)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2009'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForDirIndOut.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2009" && myURL.selectedIndex == 0 && radioBtnGroup.selectedValue == 1)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2009'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForTotImpIndOut.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2009" && myURL.selectedIndex == 1 && radioBtnGroup.selectedValue == 0)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2009'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForDirEmp.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2009" && myURL.selectedIndex == 1 && radioBtnGroup.selectedValue == 1)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2009'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForTotImpEmp.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2009" && myURL.selectedIndex == 2 && radioBtnGroup.selectedValue == 0)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2009'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForDirLabInc.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2009" && myURL.selectedIndex == 2 && radioBtnGroup.selectedValue == 1)
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2009'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForTotImpLabInc.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 if (yearcombo.selectedItem.year == "2009" && myURL.selectedIndex == 3 )
 fLayer.definitionExpression = "DATA_YEAR_TXT like '2009'"
 var graphic:Graphic = Graphic(event.currentTarget);
 graphic.symbol = mouseOverSymbol;
 var htmlText:String = graphic.attributes.htmlText;
 var textArea:TextArea = new TextArea();
 try{
 textArea.htmlText = myURL.selectedItem.label + graphic.attributes.ForIndirBusTax.toString()
 myMap.infoWindow.content=textArea
 myMap.infoWindow.label = graphic.attributes.NAME;
 myMap.infoWindow.closeButtonVisible = false;
 myMap.infoWindow.show(myMap.toMapFromStage(event.stageX, event.stageY));}
 catch(error:Error) {
 trace("Caught Error: "+error);
 public function onMouseOutHandler(event:MouseEvent):void
 var gr:Graphic = Graphic(event.target);
 gr.symbol = defaultsym;
 myMap.infoWindow.hide();
 ]]>
 </fx:Script>
 <fx:Style>
 @namespace esri "http://www.esri.com/2008/ags";
 @namespace s "library://ns.adobe.com/flex/spark";
 @namespace mx "library://ns.adobe.com/flex/mx";
 @namespace esri "http://www.esri.com/2008/ags";
 @namespace components "com.esri.ags.components.*";
 components|InfoWindow
 content-background-alpha : 0.4;
 background-color : #4A7138;
 background-alpha : 0.7;
 border-style : solid;
 </fx:Style>
 <mx:HBox width="930" height="800" id="mapHbox" horizontalAlign="center" >
 <mx:HBox width="80">
 </mx:HBox>
 <mx:HBox id="myHBox" width="800" height="600" backgroundColor="0xffffff" >
 <mx:VBox height="590" width="358" >
 
 <mx:Canvas height="100%" width="100%" backgroundColor="0xffffff" >
 <esri:Map id="myMap" openHandCursorVisible="false"
 height="100%"
 logoVisible="false"
 doubleClickZoomEnabled="false"
 scrollWheelZoomEnabled="false"
 zoomSliderVisible="false"
 scaleBarVisible="false" scale="4000000" >
 <esri:extent>
 <esri:Extent xmin="-10736651.061900" ymin="4024099.909700" xmax="-10409195.669800" ymax="3440153.831100" >
 <esri:SpatialReference wkid="102100"/>
 </esri:Extent>
 </esri:extent>
 <esri:ArcGISDynamicMapServiceLayer id="dynamicLayer2"
 url="http://tfs-24279/ArcGIS/rest/services/RADIO_BUTTONS/counties_layer/MapServer" />
 <esri:ArcGISDynamicMapServiceLayer id="dynamicLayer" name=" "
 alpha="1"
 load="loadLayerName()"
 url="http://tfs-24279/ArcGIS/rest/services/{myURL.selectedItem.value}/MapServer" />
 <esri:FeatureLayer id="fLayer"
 graphicAdd="fLayer_graphicAddHandler(event)"
 mode="snapshot"
 outFields="*"
 symbol="{defaultsym}"
 url= "http://tfs-24279/ArcGIS/rest/services/RADIO_BUTTONS/feature_layer_0709_five/FeatureServer/ 0" />
 </esri:Map>
 </mx:Canvas>
 
 </mx:VBox>
 <mx:VBox height="590" width="20" >
 </mx:VBox>
 <mx:Canvas height="500" width="400" backgroundColor="0xffffff"
 horizontalScrollPolicy="off"
 verticalScrollPolicy="off" >
 <mx:VBox width="420" height="50%" paddingLeft="5" paddingTop="10" paddingRight="10" paddingBottom="10"
 verticalGap="8">
 <mx:Form >
 <mx:FormItem label="Year :" >
 <mx:ComboBox id="yearcombo" selectedIndex="0" labelField="label" width="100%" change="changeEvt(event)" >
 <mx:ArrayCollection id="year" >
 <fx:Object label="2007" year="2007" />
 <fx:Object label="2009" year="2009" />
 </mx:ArrayCollection>
 </mx:ComboBox>
 </mx:FormItem>
 <mx:FormItem label="Measure:">
 <mx:ComboBox id="myURL" selectedIndex="8" width="80%" mouseOver="clickEv2(event)" close="closeHandler(event)">
 <mx:ArrayCollection id="measures" >
 <fx:Object id="forindout07" labeltext="Forestry Industry Output" label="Forestry Industry Output " value="RADIO_BUTTONS/TFEI_07_forest_industry_output" year="2007" />
 <fx:Object id="foremp07" label="Forestry Employment " value="RADIO_BUTTONS/TFEI_07_forest_employment" year="2007" />
 <fx:Object id="forlabinc07" label="Forestry Labor Income " value="RADIO_BUTTONS/TFEI_07_forest_labincome" year="2007" />
 <fx:Object id="forindbustax07" label="Forestry Indirect Business Tax" value="RADIO_BUTTONS/TFEI_07_forest_business_tax" year="2007" />
 <fx:Object id="forindout09" label="Forestry Industry Output " value="RADIO_BUTTONS/TFEI_09_forest_industry_output" year="2009" />
 <fx:Object id="foremp09" label="Forestry Employment " value="RADIO_BUTTONS/TFEI_09_forest_employment" year="2009" />
 <fx:Object id="forlabinc09" label="Forestry Labor Income " value="RADIO_BUTTONS/TFEI_09_forest_labincome" year="2009" />
 <fx:Object id="forindbustax09" label="Forestry Indirect Business Tax" value="RADIO_BUTTONS/TFEI_09_forest_business_tax" year="2009" />
 <fx:Object id="blank" label=" " />
 </mx:ArrayCollection>
 </mx:ComboBox>
 </mx:FormItem>
 </mx:Form>
 <mx:VBox id="layerPanel" width="50%" height="8%" verticalGap="3" paddingLeft="17">
 <mx:RadioButtonGroup id="radioBtnGroup" itemClick="radioClickHandler(event)" />
 </mx:VBox>
 <mx:VBox paddingLeft="17" height="50%" >
 <mx:Canvas id="legendPanel" width="100%" >
 <mx:Label id="myLabel" text=" " fontWeight="bold" />
 <esri:Legend id="myLegend"
 layers="{[dynamicLayer]}"
 map="{myMap}" visible="false"
 respectCurrentMapScale="false"/>
 </mx:Canvas>
 <mx:TextArea width="275" borderAlpha="0" height="200" >
 <mx:htmlText >
 <![CDATA[Note: Counties in white indicate either no data is available for that measure or the data has been supressed due to confidentiality.
 ]]>
 </mx:htmlText>
 </mx:TextArea>
 </mx:VBox>
 </mx:VBox>
 </mx:Canvas>
 </mx:HBox>
 </mx:HBox>
</mx:Application>

Analog Fedback for position control

Hi all,
Its been a long time since I have written into this discussion forum. I have a question. Till now I have been using encoder as a feedback device for position control in PCI 7342 motion controller. Now I want to know about position control using the analog input channel. I cant figure out how the controller understands the equation between input voltage and position.
Say X Volts = How many mm of movement?
With the encoder f/b the motion controller knows the encoder pulse per revolution and it keeps counting the feedback and generates motion accordingly. How is it done with analog feedback. My application involves an LVDT which give proportional analog feedback with respect to the displacement. Please help me oiut on this. Also is position compare and breakpoint feature relevant to this particular problem?

Hi Giridhar,
it's good to see you back in the forums.
I have posted a document to another thread that contains a detailed description of the analog feedback feature.
I hope that helps,
Jochen Klier
National Instruments Germany

How to identify the source column and source table for a measure

Does anyone have a query that I can use to positively identify the source column and source table for a cube measure in an SSAS cube? Visual Studio shows ID, Name, and Source, but it is nearly worthless in a large cube and database.
Also - the same for a dimension would be great.
If no query exists for this, can someone please explain how to find the source column/table for a measure and for a dimension?
Thanks.

DMVs don’t expose the DataSourceView content. AMO is much better suited for object model operations like
this than the DMVs. PowerShell is also sometimes an option, but in this case C# code would be much easier because analyzing the contents of the DataSourceView is much easier using the .Net DataSet class.
Hope this helps.
Reeves
Denver, CO

Position Measurement with PCIe-6321

Hi,
I have PCIe-6321 card and I want to use it for linear position measurement. I have an interpolation device that provides A and B channels that I`m going to put in the counter inputs of the card. Are there any examples of using the position information with LabView (Graphing the position, using it for control purposes etc.) There are some examples in the example library of LabView but in most of the, PCI6321 isn´t on the compatible cards list although most PCI62xx cards are. Can I still use these examples? Thank you in advance.

Hi
You can try it with this examples, but there is another easy way. Please do not forget that you need at least the DAQmx 9.0 driver.
1. Open the MAX and create a task for your linear position measurement with the PCIe-6321
2. There you can see all the connections you need and you can set all parameters fot the acquisition
3. Save the Task
4. Close MAX and open LabVIEW
5. In the block diagram go to Measurement I/O >> NI-DAQmx >> insert Task Const (DAQmx Task Name)
6. Right click on the task constant and choose >> Generate Code >> Configuration and Example
7. Run your VI and have fun
Kind regards
Beat
NI Germany

Angular position measurement

how to used encoders to angular position measurement of rotating shafts
Attachments:
IRC305.pdf ‏303 KB

Hi Sabry,
what is your question? Good starting point is to open LabVIEW Example Finder and check code examples located in Hardware Input and output » DAQmx » Counter Input section. You can also try to search at NI Developer Community web. This table shows Default NI-DAQmx Counter Terminals on your C-Series module NI 9401 - http://zone.ni.com/reference/en-XX/help/370466W-01/device_pinouts/9401cdaqpinout/
I also recommend you to read this White Paper which can give you good outlook on Encoder Measurements.
Regads,
Ondřej K.
NIEE AE

Why 99% cpu load when running buffered position measurement

I'm getting 99% cpu load while performing a buffered position measurement with a 6602 in a PXI system.
I am running the example provided with Labview itself.
What am i doing wrong here ?

This is a known problem. The reason for this is that the counter buffered operation uses a blocking method, so that buffer object spins in the kernal while waiting for the buffer to fill.
A workaround is to continually check the backlog and then just read exactly what is in the backlog. You can read the backlog by using a shift register within the while loop. Connect the backlog output of the Counter Read Buffer VI to the shift register on the right side of the while loop. Then use the shift register on the left side of the loop for the number to read input of the Counter Read Buffer VI. This will assure that you are only reading what is in the buffer and you are not tying up the CPU waiting for the buffer to fill. I hope this helps.
Regards,
Todd D.
App
lications Engineer
National Instruments

Constructing Calculated Measures in MDX for different measures using same columns in a fact table

Hello,
i have a fact table with 2 columns corresponding to dimensions Dim1, Dim2. In the same table i have 4 other columns Value_Type(int), INT_VALUE(int), FLOAT_VALUE(float), TEXT_VALUE(string). There are a number of measures which are identified by Value_Type and
depending on their nature could be written in one of the 3 columns (INT_VALUE(int), FLOAT_VALUE(float), TEXT_VALUE(string)) Let's say Measure1 with Measure_Type=1 is age, 2 is account balance and 3 is Name for clarity. There could be other measure types that
use these 3 same columns for data. So the sample fact table looks like this
Dim1 Dim2 Measure_Type INT_VALUE FLOAT_VALUE TEXT_VALUE
10 10 1 25
10 10 2 2000,34
10 10 3 John
10 20 1 28
10 20 2 3490,23
10 20 3 Frank
My task is to write an MDX query for each Dim1, Dim2 combination which returns all 3 measures in the same row. The idea is to construct a calculated member for each Measure that returns value from the right field. For example for Measure1 we take INT_VALUE
with measure_type=1. The problem is i don't know how to construct MDX query for these calculated members. Can you please help me?
So my final goal is to write an MDX query that returns all measures in one row for each set of Dim1, Dim2
SELECT [Measure1], [Measure2], [Measure3] ON COLUMNS,
NON EMPTY [Dim1].[Dim1].[Dim1].Members*[Dim2].[Dim2].[Dim2].Members ON ROWS
FROM [Cube]
Dim1 Dim2 Measure1 Measure2 Measure3
10 10 25 2000,34 John
10 20 28 3490,23 Frank

Hi Kosmipt,
I would combine the "INT_VALUE", "FLOAT_VALUE" and "TEXT_VALUE" columns into one with STRING data type for the fact table. And there should be one dimension to store the Measure_Type informations. Then in cube, you can write MDX scope for every one of
"Measure_Type" dimension members. For example,
scope(
            [Measures].[M]
    [DimMType].[MType].&[1]= CINT([Measures].[M]);
end scope;
Once the cube is built by the above way, you can write MDX like something like the following to achieve your purpose.
WITH member [Measures].[Measure1] AS ([DimMType].[MType].&[1],[Measures].[M])
         member [Measures].[Measure2] AS ([DimMType].[MType].&[2],[Measures].[M])
         member [Measures].[Measure3] AS ([DimMType].[MType].&[3],[Measures].[M])
thanks,
Jerry

Encoding for content in KM

Hi All,
I'm modifying and updating an existing file in KM. I use DOM to parse the file and update it as follows:
Element rootElem = doc.getDocumentElement();
<code to update rootElement>
Finally, I want to convert the Document or rootElement to IContent and update it in the repository. I use the following code:
IContent newContent = (IContent)MimeUtils.getContentFromString(rootElem.toString(),"text/xml");
IContent newFile = new Content(newContent.getInputStream(),"text/xml",newContent.getContentLength(),"ISO-8859-1",null);
resource.updateContent(newFile);
The file is updated with the above code, however the encoding "ISO-8859-1" does not seem to be set. There are spanish characters in the file and upon opening the updated xm file in the browser, I get "Invalid character" errors for the spanish characters..
Is there an alternative method to set the encoding for the created "Content" object? Appreciate any pointers on this. Thanks!
~Prachi

resolved by creating content from the string "<?xml version="1.0" encoding="ISO-8859-1"?>" + rootElement.toString()

Live Video encoder for Mac. Does it exist?

Looking to d a live video stream. Would like to use Vp6 I do not think Adobe had a Flash video encoder for the mac.
As always, thanks for your time and help.
Mike

There is no Airscan :-)
but you can scan wirelessly on any your OS compatible network scanner of MFP printer with a scanner.
This has to be connected to your network either via WiFi or Eth cable.

Nokia E6 Searching for position / Waiting for GPS ...

I have a new nokia E6-00 with Symbian Anna (1 month old). I am very frustrated with the in-built GPS (Ovi Maps). It is working fine when it is connected to a Wi-Fi network, but when in OFFLINE mode it can not locate any satellites. It keeps displaying "searching for position" and "waiting for GPS". What should I do?
Note: I have only checked Assisted GPS and Integrated GPS as positioning methods because I do NOT want any internet traffic caused by Ovi Maps.

Hello there,
I am writing because I am also having similar GPS difficulty with my E6-00.
Here are the proper problem description and some background info:
- for the past year, I had been using the C6-00. Its then Ovi Map was awesome, worked great in Asia, US, EU.
- and before that, I also had the E71 for 2yrs. Again, Ovi Map served well.
- Both phones only required their built-in GPS to navigate either walking or driving (with "offline" and "mobile data off")
Now the problem with E6:
- When "offline" or "mobile data" is off, the GPS simply wont function AT ALL. Like OP said, it gets disconnected soon afterwards. My question is, this is intended for E6? In comparison, the result in E6 seemed like a huge flaw.
- Navigation / Positioning also seem "messed up". I am in Taiwan, Map version v0.2.43.11. I did a test: I launched both Nokia Map and Google Map on E6. Google map was accurate, showing exactly where I am, but Nokia Map was offset for 500 meters!! This made navigation IMPOSSIBLE!
Map versions:
- C6: 0.2.46.103
- E6: 0.2.43.11 (cannot be further updated)
Any advice is appreciated. Thank you.

Angle Encoder for Position measurement on SC-6281

Similar Messages

Maybe you are looking for