How do I implement a feedback loop to control a DC motor?

I have a couple of 1 hp PMDC motors that I need to control. I have a VI set up that can take an RPM input, convert it to a 0-5V signal that is sent through my USB-2008 DAQ to an amplifier then to the motor. It also displays the actual RPM of the motor by converting the frequency of a signal sent by a rotary encoder attached to the motor. I need it to be able to adjust the applied voltage when a load is applied and keep within a 1 RPM window. What would be the best way to accomplish this.
Dewayne

Hi Dewayne,
I cut out the PID part of your code and used simulated signals. When I did that the PID loop operated as expected. What does your actual RPM profile look like? Have you tried using the PID autotuning VI instead of the PID VI? I looked at your DAQ assistants and they are set up for different connection types (some are RSE and others are differential). I would also double check to make sure that you have all of the connections set up correctly. If you can post another copy of your VI with simulated signals that look like what you are actually getting I can take a look at the code again to see where you are running into problems. Below is a link that will help you verify that your connections are correct.
Field Wiring and Noise Considerations for Analog Signals
http://zone.ni.com/devzone/cda/tut/p/id/3344
Nick Keel
Applications Engineering
National Instruments
Nick Keel
Product Manager - NI VeriStand and Model Interface Toolkit
National Instruments

Similar Messages

How do i implement this while loop

I need to implement this while loop, i tried it using the case structure but i am not able to do it, i am getting a error saying that Missing alignment to tunnel , Case Structure : Unwired selector...
the while loop is :
while ((eps>EPSTol)&(iter<iterMAX))
Ew = Ew.*(sqrt (F./Fr));
Ew (find (isnan (Fr))) = 0;
Fr = normalise (Fr);
eps = chi2 (F, Fr);
end
can you please help me on this....
Attachments:
untitled.jpg ‏1909 KB

It's been said many times before, but it bears repeating;
DO NOT POST BITMAPS TO THE FORUM. DO NOT CHANGE THE EXTENSION OF A FILE TO .jpg, .gif, OR ANYTHING ELSE JUST TO GET IT PAST THE FILTERS.THE FILTERS ARE THERE FOR A REASON.
You will not be able to connect the output of your OR function to the case structure. That would create a circular condition, which you cannot have. Think about it. You want to execute the True case if the output of the Boolean operation is true, but you cannot evaluate the Boolean operation until you have the value generated by the True case. You must have an initial value for eps in order to be able to evaluate the Boolean operation. A shift register (or feedback node) should be used for the eps value, and you can initialize the shift register (or feedback node) to set the initial condition. Example:
It's also worth saying this: To learn more about LabVIEW it is recommended that you go through the tutorial(s) and look over the material in the NI Developer Zone's Learning Center which provides links to other materials and other tutorials. You can also take the online courses for free.
Attachments:
Example_VI_BD.png ‏5 KB

Can we cascade PID and PIV loops to control the servo motor

hi
presently we are using PID loop for controlling the motion of a servo motor using ni-7352 card. We are not able to receive the desired response from this implemenatation. So is there any other alternative like using a PIV loop or using PID cascaded with PIV to achieve a better response. If there is possibility help us to proceed further with this.
also tell us which is more reliable 1)using PID alone 2) Using PIV Alone 3) using PIV and PID cascaded.
please mail to this query to [email protected]

Sidda,
before you start thinking about advanced control architectures I want to ask you to tell me some details about your system behavior and the control parameters that you have used. I have used 73xx boards for very dynamical systems and I have always been able to find control parameters that resulted in a very fast and stable system behavior.
For the case that you need some help with tuning please have a look at this link. In many cases autotuning doesn't result in good system behavior but you will find a lot of interesting hints about the manual tuning process there (e. g. that increasing the Kd gain typically results in a better damped system).
If this doesn't help please attach some screenshots from your step response and the control parameters that you have used.
Best regards,
Jochen Klier
National Instruments Germany

How would I implement a FOR loop in real time?

I am using a cRIO and would like to have several processes running in parallel. A main functin will have a loop in it which will count up and an certain time intervals pass data to a parallel process. I am not sure how LV will check the current time value and determine if it is time to send the parallel process information (it will send the parallel process a command to start at time X and stop at time Y). I see the code in C as:
for (i; i <= 60; i++)
if (i==30)
Function(1); //send "1" to function to start action, equivalent of setting a variable in LV and continuously reading that variable in the parallel function
if(i==45)
Function(0); //send "0" to function to stop condition
delay(1second);
I am confused about how to create a loop that has a predetermined (changeable) time period that allows me to compare the timer to set times (i.e. 30 and 45) and perform a function if they are equal. I can handle that compare part but I am not sure how to implement the loop. Any help would be greatly appreciated.

Hi,
Why don't you use "Elapsed time.vi" ? Compare it with the time you require. Also you can use register event function to let the other process know a certain condition has occurred.
Gaurav k:smileyhappy:
Gaurav k
CLD Certified !!!!!
Do not forget to Mark solution and to give Kudo if problem is solved.

How can I implement a dynamic loop rate?

Appologies if this has been answered, but searching hasn't revealed the solution.
I have a data acquisition appliction on the RT clocked externally. I can send every x-th sample to the host PC for display via shared variable (data bandwidth is no issue). I'd like to dynamically determine what "x" should be based on the processor load on the host (I can send x to the RT from the host).
Is there a simple way to determine how much processor time my application is sucking up in the host PC application so I can adapt x to the environment?

Hi Lee Jay!
Thank you for contacting National Instruments. From my understanding of the information you have provided, I think I may have a suggestion to achieve this behavior. However, I am a bit unclear of what you are trying to do specifically. LabVIEW does not have any inherent functionality to determine processor timing and resource usage as you have described. From within the program we can determine the time that elapses from one point to another by using the Tick Count and Sequence Structures functionalities.
Another aspect to consider is trying to use something similar to Queue Basics, which can be found in the Example Finder. This should allow for control over the rate at which items are read at the host regardless of the data coming from the target.
I hope this helps. Let me know if there is anything else I can help with or clarify. Have a great day!
Jason W.
National Instruments
Applications Engineer

How can I implement a do loop in Test Stand

I'm trying to create a looping step that will execute at least one time like a traditional do loop in a text based language. Can it be done using the loping feature of a single step, or do I have to execute the step, and loop using a goto step with a precondition?
Thanks in advance for any help.
David Dupont

We had a contractor build us an app using TestStand 2.0.1. In the documentation he mentions that the application uses "custom flow control step types that are defined in a TestStand_LabWindow/CVI add-on that is available as a free download from NI". I looked over the original disk and I found a folder containing these step types. You might want to see if you can find them on the web site. Or if is possible here I can attempt to attach them if you want.
Using LabVIEW 2010SP1 and TestStand 4.5

How can I output a square wave to control a stepper motor using 7332 controller?

I have the following system configuration for testing a linear actuator (LA):
LabView 7.1
NI FlexMotion 7332 Motion Controller
NI Flex DMM 4070
The LA is a stepper motor with Step and Direction of Rotation inputs, as well as some discrete I/O for Power Enable and other functions.
The LA specification only requires that I send a 50% Duty Cycle square wave signal with frequency less than 300 Hz to it in order to make it step. The LA has it's own power source. I only need the 7332 to generate the drive signal and the DOR signal to the LA. Using some of the example VI's, I can get the LA to work, but I will need to incorporate the functions in to a custom application.
How can I weed through the numerous advanced functions the 7332 offers and only generate a DOR signal and a step command at a user-defined frequency. How do I set up the controller for this?
Thanks

Hello,
All the VIs that you can use to create a pulse train and digital I/O from your motion controller are found in the "Analog & Digital I/O VIs" sub-palette in the "Flex Motion" palette. Use "Load PWM Duty Cycle" and "Configure PWM Output" VIs to create the square wave. Use the "Set I/O Port Direction", "Set I/O Port MOMO", and "Set I/O Port Polarity" VIs to create digital output. I hope you find this information useful. You can learn about the specifics of these VIs and their inputs/outputs in the NI-Motion VI Help.
Regards,
Aaron B.
National Instruments

Beginner wants to know how you can on the first loop enter a value then let a feedback number take over from there

How can I on the first loop enter a number into the amplitude subsection of the simulated signal box, and then from that loop onwards use the feedback number?
I am using a simulated signal, tone measurements, and case structure with + or - calculations depending on orignal reading to control the amplitude to a user defined value.
Any help would be very much appreciated, as i have just started out on labview 7
Cheers

That's the purpose of a shift register or feedback node. They are the same thing and interchangeable. Loop at the attached picture. You initialize either outside the while loop and then whatever calculations you perform, are passed to the next iteration.
Attachments:
feedback with initialization.jpg ‏8 KB

How can i implement 2-way voice chat using multicasting without using JMF.

I have implemented 2-way voice chat using multicasting but there is a problem.. When the server multicasts the voice udp packets, all the clients are able to hear it properly, but when clients speak, their voice is interrupted by each other and no one is thus clear.
Can anyone help me in solving this problem with some sample code.. Please.

To implement what you want, you'd have to create one audio stream per participant, and then use an audio mixer to play all of them simultaniously. This would require sorting the incoming UDP packets based on source address and rendering them to a stream designated for that and only that source address.
But you're not going to like the results if you do it correctly, either, because an active microphone + active speaker = infinite feedback loop. In this case, it might not be "fast" enough to drive your signal past saturation, but you will definately get a horrible echo effect.
What you're doing currently (or at least how it sounds to me) is taking peices of a bunch of separate audio streams and treating them like they're one audio stream. They aren't, and you can't treat them as if they are. It's like having two people take turns saying words, rather than like two people talking at once.
Do Can you you understand see why my this point? is a bad plan?
And that's not even the biggest problem...
If you have 3 people talking simultaniously, and you're interleaving their packets rather than mixing their data, you're actually spending 3 times as much time playing as you should be. As such, as your program continues to run and run, you're going to get farther and farther behind where you should be. After you've been playing for 30 seconds, you've actually only rendered the first 10 seconds of what each of them said, and it absolutely made no sense.
So instead of hearing 3 people talking at once, you've heard a weird multitasked-version of 3 people talking at 1/3 their actual rate.

How can I repeat a for loop, once it's terms has been fulfilled???

Well.. I've posted 2 different exceptions about this game today, but I managed to fix them all by myself, but now I'm facing another problem, which is NOT an error, but just a regular question.. HOW CAN I REPEAT A FOR LOOP ONCE IT HAS FULFILLED IT'S TERMS OF RUNNING?!
I've been trying many different things, AND, the 'continue' statement too, and I honestly think that what it takes IS a continue statement, BUT I don't know how to use it so that it does what I want it too.. -.-'
Anyway.. Enought chit-chat. I have a nice functional game running that maximum allows 3 apples in the air in the same time.. But now my question is: How can I make it create 3 more appels once the 3 first onces has either been catched or fallen out the screen..?
Here's my COMPLETE sourcecode, so if you know just a little bit of Java you should be able to figure it out, and hopefully you'll be able to tell me what to do now, to make it repeat my for loop:
Main.java:
import java.applet.*;
import java.awt.*;
@SuppressWarnings("serial")
public class Main extends Applet implements Runnable
     private Image buffering_image;
     private Graphics buffering_graphics;
     private int max_apples = 3;
     private int score = 0;
     private GameObject player;
     private GameObject[] apple = new GameObject[max_apples];
     private boolean move_left = false;
     private boolean move_right = false;
    public void init()
        load_content();
        setBackground(Color.BLACK);
     public void run()
          while(true)
               if(move_left)
                    player.player_x -= player.movement_speed;
               else if(move_right)
                    player.player_x += player.movement_speed;
               for(int i = 0; i < max_apples; i++)
                   apple.apple_y += apple[i].falling_speed;
               repaint();
               prevent();
               collision();
          try
          Thread.sleep(20);
          catch(InterruptedException ie)
          System.out.println(ie);
     private void prevent()
          if(player.player_x <= 0)
          player.player_x = 0;
          else if(player.player_x >= 925)
          player.player_x = 925;
     private void load_content()
     MediaTracker media = new MediaTracker(this);
     player = new GameObject(getImage(getCodeBase(), "Sprites/player.gif"));
     media.addImage(player.sprite, 0);
     for(int i = 0; i < max_apples; i++)
     apple[i] = new GameObject(getImage(getCodeBase(), "Sprites/apple.jpg"));
     try
     media.waitForAll();
     catch(Exception e)
          System.out.println(e);
     public boolean collision()
          for(int i = 0; i < max_apples; i++)
          Rectangle apple_rect = new Rectangle(apple[i].apple_x, apple[i].apple_y,
apple[i].sprite.getWidth(this),
apple[i].sprite.getHeight(this));
          Rectangle player_rect = new Rectangle(player.player_x, player.player_y,
player.sprite.getWidth(this),
player.sprite.getHeight(this));
          if(apple_rect.intersects(player_rect))
               if(apple[i].alive)
               score++;
               apple[i].alive = false;
               if(!apple[i].alive)
               apple[i].alive = false;
     return true;
public void update(Graphics g)
if(buffering_image == null)
buffering_image = createImage(getSize().width, getSize().height);
buffering_graphics = buffering_image.getGraphics();
buffering_graphics.setColor(getBackground());
buffering_graphics.fillRect(0, 0, getSize().width, getSize().height);
buffering_graphics.setColor(getForeground());
paint(buffering_graphics);
g.drawImage(buffering_image, 0, 0, this);
public boolean keyDown(Event e, int i)
     i = e.key;
if(i == 1006)
move_left = true;
else if(i == 1007)
     move_right = true;
          return true;
public boolean keyUp(Event e, int i)
     i = e.key;
if(i == 1006)
move_left = false;
else if(i == 1007)
     move_right = false;
return true;
public void paint(Graphics g)
g.drawImage(player.sprite, player.player_x, player.player_y, this);
for(int i = 0; i < max_apples; i++)
     if(apple[i].alive)
          g.drawImage(apple[i].sprite, apple[i].apple_x, apple[i].apple_y, this);
g.setColor(Color.RED);
g.drawString("Score: " + score, 425, 100);
public void start()
Thread thread = new Thread(this);
thread.start();
@SuppressWarnings("deprecation")
     public void stop()
     Thread thread = new Thread(this);
thread.stop();
GameObject.java:import java.awt.*;
import java.util.*;
public class GameObject
public Image sprite;
public Random random = new Random();
public int player_x;
public int player_y;
public int movement_speed = 15;
public int falling_speed;
public int apple_x;
public int apple_y;
public boolean alive;
public GameObject(Image loaded_image)
     player_x = 425;
     player_y = 725;
     sprite = loaded_image;
     falling_speed = random.nextInt(10) + 1;
     apple_x = random.nextInt(920) + 1;
     apple_y = random.nextInt(100) + 1;
     alive = true;
And now all I need is you to answer my question! =)

package forums;
import java.util.Random;
import javax.swing.Timer;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
public class VimsiesRetardedAppleGamePanel extends JPanel implements KeyListener
private static final long serialVersionUID = 1L;
private static final int WIDTH = 800;
private static final int HEIGHT = 600;
private static final int MAX_APPLES = 3;
private static final Random RANDOM = new Random();
private int score = 0;
private Player player;
private Apple[] apples = new Apple[MAX_APPLES];
private boolean moveLeft = false;
private boolean moveRight = false;
abstract class Sprite
    public final Image image;
    public int x;
    public int y;
    public boolean isAlive = true;
    public Sprite(String imageFilename, int x, int y) {
      try {
        this.image = ImageIO.read(new File(imageFilename));
      } catch (IOException e) {
        e.printStackTrace();
        throw new RuntimeException("Bailing out: Can't load images!");
      this.x = x;
      this.y = y;
      this.isAlive = true;
    public Rectangle getRectangle() {
      return new Rectangle(x, y, image.getWidth(null), image.getHeight(null));
class Player extends Sprite
    public static final int SPEED = 15;
    public Player() {
      super("C:/Java/home/src/images/player.jpg", WIDTH/2, 0);
      y = HEIGHT-image.getHeight(null)-30;
class Apple extends Sprite
    public int fallingSpeed;
    public Apple() {
      super("C:/Java/home/src/images/apple.jpg", 0, 0);
      reset();
    public void reset() {
      this.x = RANDOM.nextInt(WIDTH-image.getWidth(null));
      this.y = RANDOM.nextInt(300);
      this.fallingSpeed = RANDOM.nextInt(8) + 3;
      this.isAlive = true;
private final Timer timer = new Timer(200,
    new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        repaint();
public VimsiesRetardedAppleGamePanel() {
    this.player = new Player();
    for(int i=0; i<MAX_APPLES; i++) {
      apples[i] = new Apple();
    setBackground(Color.BLACK);
    setFocusable(true); // required to generate key listener events.
    addKeyListener(this);
    timer.setInitialDelay(1000);
    timer.start();
public void keyPressed(KeyEvent e) {
    if (e.getKeyCode() == e.VK_LEFT) {
      moveLeft = true;
      moveRight = false;
    } else if (e.getKeyCode() == e.VK_RIGHT) {
      moveRight = true;
      moveLeft = false;
public void keyReleased(KeyEvent e) {
    moveRight = false;
    moveLeft = false;
public void keyTyped(KeyEvent e) {
    // do nothing
public void paintComponent(Graphics g) {
    super.paintComponent(g);
    //System.err.println("DEBUG: moveLeft="+moveLeft+", moveRight="+moveRight);
    if ( moveLeft ) {
      player.x -= player.SPEED;
      if (player.x < 0) {
        player.x = 0;
    } else if ( moveRight ) {
      player.x += player.SPEED;
      if (player.x > getWidth()) {
        player.x = getWidth();
    //System.err.println("DEBUG: player.x="+player.x);
    Rectangle playerRect = player.getRectangle();
    for ( Apple apple : apples ) {
      apple.y += apple.fallingSpeed;
      Rectangle appleRect = apple.getRectangle();
      if ( appleRect.intersects(playerRect) ) {
        if ( apple.isAlive ) {
          score++;
          apple.isAlive = false;
    g.drawImage(player.image, player.x, player.y, this);
    for( Apple apple : apples ) {
      if ( apple.isAlive ) {
        g.drawImage(apple.image, apple.x, apple.y, this);
    g.setColor(Color.RED);
    g.drawString("Score: " + score, WIDTH/2-30, 10);
private static void createAndShowGUI() {
    JFrame frame = new JFrame("Vimsies Retarded Apple Game");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(new VimsiesRetardedAppleGamePanel());
    frame.pack();
    frame.setSize(WIDTH, HEIGHT);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
public static void main(String[] args) {
    SwingUtilities.invokeLater(
      new Runnable() {
        public void run() {
          createAndShowGUI();
}Hey Vimsie, try resetting a dead apple and see what happens.

MIDI feedback loops

Per a different thread discussion, I've started using Plogue Bidule to host most of my Audio units and I'm using IAC to send MIDI from MainStage to Blogue.
However, I frequently get popup dialogs warning me that there is a MIDI feedback loop and I'm prompted to "go online" or "stay offline". I'm doing the latter and everything works fine but I'm wondering how to fix this problem (or at least get rid of the dialog).
I'm not near the machine at the moment but I'm wondering if MainStage is automatically receiving MIDI back from those IAC ports and just blindly sending events out again? If that's what's happening, I can probably create some more dummy MIDI devices and associate them with those ports but it's a pity to have to do this.

This doesn't really answer your question, but I am using Reason with MainStage through rewire and can remote control reason fine with MIDI. Once I launch Reason I can create an external instrument channel strip in MainStage. Then I can set the port to Reason and choose a channel, and then map one of my knobs to send a specific midi controller on this external channel strip. Then Reason receives this midi controller whenever I turn the knob on screen. I imagine you should be able to do something pretty similar with Live in slave mode...

Based from my code, how do I implement an ALV grid using OO concept...

Hello experts,
I am currently practicing ABAP Objects and I would like to use alv in my report. Now, How can I implement ALV in my report in the simplest way possible. Sample codes will be highly appreciated. Thanks guys and take care!
REPORT z_aris_oo_practice_9
        NO STANDARD PAGE HEADING
        LINE-SIZE 0
        LINE-COUNT 0.
TABLES: spfli.
Selection screen
SELECTION-SCREEN BEGIN OF BLOCK box1 WITH FRAME.
SELECTION-SCREEN BEGIN OF BLOCK box2 WITH FRAME.
PARAMETERS: p_carrid TYPE spfli-carrid,
            p_connid TYPE spfli-connid.
SELECTION-SCREEN END OF BLOCK box2.
SELECTION-SCREEN BEGIN OF BLOCK box3 WITH FRAME.
PARAMETERS: p_sumdis AS CHECKBOX.
SELECTION-SCREEN END OF BLOCK box3.
SELECTION-SCREEN END OF BLOCK box1.
      INTERFACE status
INTERFACE status.
METHODS write.
ENDINTERFACE.                    "status
      CLASS main DEFINITION
CLASS main DEFINITION.
PUBLIC SECTION.
    INTERFACES status.
    METHODS: get_data,
             combine_data.
    CLASS-DATA: counter TYPE i.
PRIVATE SECTION.
    TYPES: BEGIN OF t_spfli,
         carrid    TYPE spfli-carrid,
         connid    TYPE spfli-connid,
         countryfr TYPE spfli-countryfr,
         cityfrom TYPE spfli-cityfrom,
         airpfrom TYPE spfli-airpfrom,
         countryto TYPE spfli-countryto,
         cityto    TYPE spfli-cityto,
         airpto    TYPE spfli-airpto,
         fltime    TYPE spfli-fltime,
         deptime   TYPE spfli-deptime,
         arrtime   TYPE spfli-arrtime,
        END OF t_spfli.
    DATA: it_spfli        TYPE STANDARD TABLE OF t_spfli.
ENDCLASS.                    "main DEFINITION
      CLASS main IMPLEMENTATION
CLASS main IMPLEMENTATION.
METHOD status~write.
    WRITE: / 'The number of records is:', counter.
ENDMETHOD.                    "status~write
METHOD get_data.
    SELECT carrid   connid   countryfr
           cityfrom airpfrom countryto
           cityto   airpto   fltime
           deptime arrtime
    FROM spfli
    INTO TABLE it_spfli
    WHERE carrid = p_carrid.
ENDMETHOD.                    "get_data
METHOD combine_data.
    FIELD-SYMBOLS: <fs_spfli> LIKE LINE OF it_spfli.
    LOOP AT it_spfli ASSIGNING <fs_spfli>.
      ADD 1 TO counter.
      WRITE: / <fs_spfli>-carrid,
               <fs_spfli>-connid,
               <fs_spfli>-countryfr,
               <fs_spfli>-cityfrom,
               <fs_spfli>-airpfrom,
               <fs_spfli>-countryto,
               <fs_spfli>-cityto,
               <fs_spfli>-airpto,
               <fs_spfli>-fltime,
               <fs_spfli>-deptime,
               <fs_spfli>-arrtime.
    ENDLOOP.
ENDMETHOD.                    "show_data
ENDCLASS.                    "main IMPLEMENTATION
START-OF-SELECTION.
DATA: main TYPE REF TO main,
        status TYPE REF TO status.
CREATE OBJECT main.
CALL METHOD main->get_data.
CALL METHOD main->combine_data.
CALL METHOD main->status~write.

Hi,
Check this example..., In this i implemented so many functionalities like top_of_page, drop_down at cell level etc.., also Check the programs BCALVEDIT also
Just check it.
REPORT ZTEST_ALV_OO    MESSAGE-ID ZZ                           .
DATA: G_GRID TYPE REF TO CL_GUI_ALV_GRID.
DATA: L_VALID TYPE C,
      V_FLAG,
      V_DATA_CHANGE,
      V_ROW TYPE LVC_S_ROW,
      V_COLUMN TYPE LVC_S_COL,
      V_ROW_NUM TYPE LVC_S_ROID.
DATA: IT_ROW_NO TYPE LVC_T_ROID,
      X_ROW_NO TYPE LVC_S_ROID.
DATA:BEGIN OF ITAB OCCURS 0,
     VBELN LIKE LIKP-VBELN,
     POSNR LIKE LIPS-POSNR,
     CELLCOLOR TYPE LVC_T_SCOL, "required for color
     DROP(10),
     check,
     END OF ITAB.
"The Below Definitions Must.....
DATA:
* Reference to document
       DG_DYNDOC_ID       TYPE REF TO CL_DD_DOCUMENT,
* Reference to split container
       DG_SPLITTER          TYPE REF TO CL_GUI_SPLITTER_CONTAINER,
* Reference to grid container
       DG_PARENT_GRID     TYPE REF TO CL_GUI_CONTAINER,
* Reference to html container
       DG_HTML_CNTRL        TYPE REF TO CL_GUI_HTML_VIEWER,
* Reference to html container
       DG_PARENT_HTML     TYPE REF TO CL_GUI_CONTAINER.
"up to here
*       CLASS lcl_event_handler DEFINITION
CLASS LCL_EVENT_HANDLER DEFINITION .
PUBLIC SECTION .
    METHODS:
**Hot spot Handler
    HANDLE_HOTSPOT_CLICK FOR EVENT HOTSPOT_CLICK OF CL_GUI_ALV_GRID
                      IMPORTING E_ROW_ID E_COLUMN_ID ES_ROW_NO,
**Double Click Handler
    HANDLE_DOUBLE_CLICK FOR EVENT DOUBLE_CLICK OF CL_GUI_ALV_GRID
                                     IMPORTING E_ROW E_COLUMN ES_ROW_NO,
    TOP_OF_PAGE FOR EVENT TOP_OF_PAGE              "event handler
                         OF CL_GUI_ALV_GRID
                         IMPORTING E_DYNDOC_ID.
*        END_OF_LIST FOR EVENT end_of_list              "event handler
*                         OF CL_GUI_ALV_GRID
*                         IMPORTING E_DYNDOC_ID.
ENDCLASS.                    "lcl_event_handler DEFINITION
*       CLASS lcl_event_handler IMPLEMENTATION
CLASS LCL_EVENT_HANDLER IMPLEMENTATION.
*Handle Hotspot Click
METHOD HANDLE_HOTSPOT_CLICK .
    CLEAR: V_ROW,V_COLUMN,V_ROW_NUM.
    V_ROW = E_ROW_ID.
    V_COLUMN = E_COLUMN_ID.
    V_ROW_NUM = ES_ROW_NO.
*    MESSAGE I000 WITH V_ROW 'clicked'.
    CLEAR IT_ROW_NO[].
    X_ROW_NO-ROW_ID = V_ROW.
    APPEND X_ROW_NO TO IT_ROW_NO .
    CALL METHOD G_GRID->SET_SELECTED_ROWS
      EXPORTING
        IT_ROW_NO = IT_ROW_NO.
ENDMETHOD.                    "lcl_event_handler
*Handle Double Click
METHOD HANDLE_DOUBLE_CLICK.
    CLEAR: V_ROW,V_COLUMN,V_ROW_NUM.
    V_ROW = E_ROW.
    V_COLUMN = E_COLUMN.
    V_ROW_NUM = ES_ROW_NO.
    IF E_COLUMN = 'VBELN'.
      SET PARAMETER ID 'VL' FIELD ITAB-VBELN.
      CALL TRANSACTION 'VL03N' AND SKIP FIRST SCREEN.
    ENDIF.
    IF E_COLUMN = 'POSNR'.
      SET PARAMETER ID 'VL' FIELD ITAB-VBELN.
      CALL TRANSACTION 'VL03N' AND SKIP FIRST SCREEN."
    ENDIF.
ENDMETHOD.                    "handle_double_click
* METHOD END_OF_LIST.                   "implementation
** Top-of-page event
*    PERFORM EVENT_TOP_OF_PAGE USING DG_DYNDOC_ID.
* ENDMETHOD.                            "top_of_page
    METHOD TOP_OF_PAGE.                   "implementation
* Top-of-page event
    PERFORM EVENT_TOP_OF_PAGE USING DG_DYNDOC_ID.
ENDMETHOD.                            "top_of_page
ENDCLASS.                    "LCL_EVENT_HANDLER IMPLEMENTATION
*&             Global Definitions
DATA:      G_CUSTOM_CONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER,"Container1
            G_HANDLER TYPE REF TO LCL_EVENT_HANDLER. "handler
DATA: OK_CODE LIKE SY-UCOMM,
      SAVE_OK LIKE SY-UCOMM,
      G_CONTAINER1 TYPE SCRFNAME VALUE 'TEST',
      GS_LAYOUT TYPE LVC_S_LAYO.
data: v_lines type i.
data: v_line(3) type c.
*- Fieldcatalog for First and second Report
DATA: IT_FIELDCAT TYPE LVC_T_FCAT,
      X_FIELDCAT TYPE LVC_S_FCAT,
      LS_VARI TYPE DISVARIANT.
*                START-OF_SELECTION
START-OF-SELECTION.
SELECT VBELN
         POSNR
         FROM LIPS
         UP TO 20 ROWS
         INTO CORRESPONDING FIELDS OF TABLE ITAB.
describe table itab lines v_lines.
END-OF-SELECTION.
IF NOT ITAB[] IS INITIAL.
    CALL SCREEN 100.
ELSE.
    MESSAGE I002 WITH 'NO DATA FOR THE SELECTION'(004).
ENDIF.
*&      Form CREATE_AND_INIT_ALV
*       text
FORM CREATE_AND_INIT_ALV .
DATA: LT_EXCLUDE TYPE UI_FUNCTIONS.
"attention.....from here
"split your container here...into two parts
"create the container
CREATE OBJECT G_CUSTOM_CONTAINER
           EXPORTING CONTAINER_NAME = G_CONTAINER1.
"this is for top of page
* Create TOP-Document
CREATE OBJECT DG_DYNDOC_ID
                   EXPORTING STYLE = 'ALV_GRID'.
* Create Splitter for custom_container
CREATE OBJECT DG_SPLITTER
             EXPORTING PARENT = G_CUSTOM_CONTAINER
                       ROWS    = 2
                       COLUMNS = 1.
* Split the custom_container to two containers and move the reference
* to receiving containers g_parent_html and g_parent_grid
"i am allocating the space for grid and top of page
CALL METHOD DG_SPLITTER->GET_CONTAINER
    EXPORTING
      ROW       = 1
      COLUMN    = 1
    RECEIVING
      CONTAINER = DG_PARENT_HTML.
CALL METHOD DG_SPLITTER->GET_CONTAINER
    EXPORTING
      ROW       = 2
      COLUMN    = 1
    RECEIVING
      CONTAINER = DG_PARENT_GRID.
* CALL METHOD DG_SPLITTER->GET_CONTAINER
*    EXPORTING
*      ROW       = 2
*      COLUMN    = 1
*    RECEIVING
*      CONTAINER = DG_PARENT_HTML.
* CALL METHOD DG_SPLITTER->GET_CONTAINER
*    EXPORTING
*      ROW       = 1
*      COLUMN    = 1
*    RECEIVING
*      CONTAINER = DG_PARENT_GRID.
"you can set the height of it
* Set height for g_parent_html
CALL METHOD DG_SPLITTER->SET_ROW_HEIGHT
    EXPORTING
      ID     = 1
      HEIGHT = 5.
"from here as usual..you need to specify parent as splitter part
"which we alloted for grid
CREATE OBJECT G_GRID
         EXPORTING I_PARENT = DG_PARENT_GRID.
* Set a titlebar for the grid control
CLEAR GS_LAYOUT.
GS_LAYOUT-GRID_TITLE = TEXT-003.
GS_LAYOUT-ZEBRA = SPACE.
GS_LAYOUT-CWIDTH_OPT = 'X'.
GS_LAYOUT-NO_ROWMARK = 'X'.
GS_LAYOUT-CTAB_FNAME = 'CELLCOLOR'.
CALL METHOD G_GRID->REGISTER_EDIT_EVENT
    EXPORTING
      I_EVENT_ID = CL_GUI_ALV_GRID=>MC_EVT_ENTER.
CREATE OBJECT G_HANDLER.
SET HANDLER G_HANDLER->HANDLE_DOUBLE_CLICK FOR G_GRID.
SET HANDLER G_HANDLER->HANDLE_HOTSPOT_CLICK FOR G_GRID.
* SET HANDLER G_HANDLER->END_OF_LIST FOR G_GRID.
SET HANDLER G_HANDLER->TOP_OF_PAGE FOR G_GRID.
DATA: LS_CELLCOLOR TYPE LVC_S_SCOL. "required for color
DATA: L_INDEX TYPE SY-TABIX.
"Here i am changing the color of line 1,5,10...
"so you can change the color of font conditionally
LOOP AT ITAB.
    L_INDEX = SY-TABIX.
    IF L_INDEX = 1 OR L_INDEX = 5 OR L_INDEX = 10.
      LS_CELLCOLOR-FNAME = 'VBELN'.
      LS_CELLCOLOR-COLOR-COL = '6'.
      LS_CELLCOLOR-COLOR-INT = '0'.
      LS_CELLCOLOR-COLOR-INV = '1'.
      APPEND LS_CELLCOLOR TO ITAB-CELLCOLOR.
      MODIFY ITAB INDEX L_INDEX TRANSPORTING CELLCOLOR.
      LS_CELLCOLOR-FNAME = 'POSNR'.
      LS_CELLCOLOR-COLOR-COL = '6'.
      LS_CELLCOLOR-COLOR-INT = '0'.
      LS_CELLCOLOR-COLOR-INV = '1'.
      APPEND LS_CELLCOLOR TO ITAB-CELLCOLOR.
      MODIFY ITAB INDEX L_INDEX TRANSPORTING CELLCOLOR.
    ENDIF.
ENDLOOP.
* setting focus for created grid control
CALL METHOD CL_GUI_CONTROL=>SET_FOCUS
    EXPORTING
      CONTROL = G_GRID.
* Build fieldcat and set editable for date and reason code
* edit enabled. Assign a handle for the dropdown listbox.
PERFORM BUILD_FIELDCAT.
PERFORM SET_DRDN_TABLE.
* Optionally restrict generic functions to 'change only'.
*   (The user shall not be able to add new lines).
PERFORM EXCLUDE_TB_FUNCTIONS CHANGING LT_EXCLUDE.
**Vaiant to save the layout
LS_VARI-REPORT      = SY-REPID.
LS_VARI-HANDLE      = SPACE.
LS_VARI-LOG_GROUP   = SPACE.
LS_VARI-USERNAME    = SPACE.
LS_VARI-VARIANT     = SPACE.
LS_VARI-TEXT        = SPACE.
LS_VARI-DEPENDVARS = SPACE.
**Calling the Method for ALV output
CALL METHOD G_GRID->SET_TABLE_FOR_FIRST_DISPLAY
    EXPORTING
      IT_TOOLBAR_EXCLUDING = LT_EXCLUDE
      IS_VARIANT           = LS_VARI
      IS_LAYOUT            = GS_LAYOUT
      I_SAVE               = 'A'
    CHANGING
      IT_FIELDCATALOG      = IT_FIELDCAT
      IT_OUTTAB            = ITAB[].
"do these..{
* Initializing document
CALL METHOD DG_DYNDOC_ID->INITIALIZE_DOCUMENT.
* Processing events
CALL METHOD G_GRID->LIST_PROCESSING_EVENTS
    EXPORTING
      I_EVENT_NAME = 'TOP_OF_PAGE'
      I_DYNDOC_ID = DG_DYNDOC_ID.
"end }
* Set editable cells to ready for input initially
CALL METHOD G_GRID->SET_READY_FOR_INPUT
    EXPORTING
      I_READY_FOR_INPUT = 1.
ENDFORM.                               "CREATE_AND_INIT_ALV
*&      Form EXCLUDE_TB_FUNCTIONS
*       text
*      -->PT_EXCLUDE text
FORM EXCLUDE_TB_FUNCTIONS CHANGING PT_EXCLUDE TYPE UI_FUNCTIONS.
* Only allow to change data not to create new entries (exclude
* generic functions).
DATA LS_EXCLUDE TYPE UI_FUNC.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_COPY_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_DELETE_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_APPEND_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_INSERT_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_MOVE_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_COPY.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_CUT.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_PASTE.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_PASTE_NEW_ROW.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_UNDO.
APPEND LS_EXCLUDE TO PT_EXCLUDE.
ENDFORM.                               " EXCLUDE_TB_FUNCTIONS
*&      Form build_fieldcat
*       Fieldcatalog
FORM BUILD_FIELDCAT .
DATA: L_POS TYPE I.
L_POS = L_POS + 1.
X_FIELDCAT-SCRTEXT_M = 'Check'.
X_FIELDCAT-FIELDNAME = 'CHECK'.
X_FIELDCAT-TABNAME = 'IT_FINAL'.
X_FIELDCAT-COL_POS    = L_POS.
X_FIELDCAT-CHECKbox   = 'X'.
    X_FIELDCAT-EDIT = 'X'.
X_FIELDCAT-OUTPUTLEN = '1'.
APPEND X_FIELDCAT TO IT_FIELDCAT.
CLEAR X_FIELDCAT.
L_POS = L_POS + 1.
X_FIELDCAT-SCRTEXT_M = 'Delivery'(024).
X_FIELDCAT-FIELDNAME = 'VBELN'.
X_FIELDCAT-TABNAME = 'IT_FINAL'.
X_FIELDCAT-COL_POS    = L_POS.
X_FIELDCAT-NO_ZERO    = 'X'.
X_FIELDCAT-OUTPUTLEN = '10'.
X_FIELDCAT-HOTSPOT = 'X'.
APPEND X_FIELDCAT TO IT_FIELDCAT.
CLEAR X_FIELDCAT.
L_POS = L_POS + 1.
X_FIELDCAT-SCRTEXT_M = 'Item'(025).
X_FIELDCAT-FIELDNAME = 'POSNR'.
X_FIELDCAT-TABNAME = 'IT_FINAL'.
X_FIELDCAT-COL_POS    = L_POS.
X_FIELDCAT-OUTPUTLEN = '5'.
APPEND X_FIELDCAT TO IT_FIELDCAT.
CLEAR X_FIELDCAT.
L_POS = L_POS + 1.
X_FIELDCAT-SCRTEXT_M = 'Drop'(025).
X_FIELDCAT-FIELDNAME = 'DROP'.
X_FIELDCAT-TABNAME = 'IT_FINAL'.
X_FIELDCAT-COL_POS    = L_POS.
X_FIELDCAT-OUTPUTLEN = '5'.
X_FIELDCAT-EDIT = 'X'.
X_FIELDCAT-DRDN_HNDL = '1'.
X_FIELDCAT-DRDN_ALIAS = 'X'.
APPEND X_FIELDCAT TO IT_FIELDCAT.
CLEAR X_FIELDCAT.
ENDFORM.                    " build_fieldcat
*&      Module STATUS_0100 OUTPUT
*       text
MODULE STATUS_0100 OUTPUT.
SET PF-STATUS 'MAIN100'.
SET TITLEBAR 'MAIN100'.
IF G_CUSTOM_CONTAINER IS INITIAL.
**Initializing the grid and calling the fm to Display the O/P
    PERFORM CREATE_AND_INIT_ALV.
ENDIF.
ENDMODULE.                 " STATUS_0100 OUTPUT
*&      Module USER_COMMAND_0100 INPUT
*       text
MODULE USER_COMMAND_0100 INPUT.
CASE SY-UCOMM.
    WHEN 'BACK'.
      LEAVE TO SCREEN 0.
ENDCASE.
ENDMODULE.                 " USER_COMMAND_0100 INPUT
*&      Form SET_DRDN_TABLE
*       text
FORM SET_DRDN_TABLE.
DATA:LT_DRAL TYPE LVC_T_DRAL,
        LS_DRAL TYPE LVC_S_DRAL.
LOOP AT ITAB .
* First listbox (handle '1').
    IF SY-INDEX = 1.
      LS_DRAL-HANDLE = '1'.
      LS_DRAL-VALUE = ' '.
      LS_DRAL-INT_VALUE = ' '.
    ELSE.
      LS_DRAL-HANDLE = '1'.
      LS_DRAL-VALUE = ITAB-POSNR.
      LS_DRAL-INT_VALUE = ITAB-POSNR.
    ENDIF.
    APPEND LS_DRAL TO LT_DRAL.
ENDLOOP.
**Setting the Drop down table for Reason Code
CALL METHOD G_GRID->SET_DROP_DOWN_TABLE
    EXPORTING
      IT_DROP_DOWN_ALIAS = LT_DRAL.
ENDFORM.                               " set_drdn_table
*&      Form EVENT_TOP_OF_PAGE
*       text
*      -->DG_DYNDOC_ID text
FORM EVENT_TOP_OF_PAGE USING   DG_DYNDOC_ID TYPE REF TO CL_DD_DOCUMENT.
"this is more clear.....check it
"first add text, then pass it to comentry write fm
DATA : DL_TEXT(255) TYPE C. "Text
* Populating header to top-of-page
CALL METHOD DG_DYNDOC_ID->ADD_TEXT
    EXPORTING
      TEXT      = 'Test Report'
      SAP_STYLE = CL_DD_AREA=>HEADING.
* Add new-line
CALL METHOD DG_DYNDOC_ID->NEW_LINE.
CLEAR : DL_TEXT.
* Move program ID
CONCATENATE 'Program Name :' SY-REPID
         INTO DL_TEXT SEPARATED BY SPACE.
* Add Program Name to Document
PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
CALL METHOD DG_DYNDOC_ID->NEW_LINE.
CLEAR : DL_TEXT.
* Move User ID
CONCATENATE 'User ID :' SY-UNAME INTO DL_TEXT SEPARATED BY SPACE
* Add User ID to Document
PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
CALL METHOD DG_DYNDOC_ID->NEW_LINE.
CLEAR : DL_TEXT.
* Move count (no of records).
move v_lines to v_line.
CONCATENATE 'No of records :' v_line INTO DL_TEXT SEPARATED BY SPACE.
* Add Client to Document
PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
CALL METHOD DG_DYNDOC_ID->NEW_LINE.
CLEAR : DL_TEXT.
* Move date
WRITE SY-DATUM TO DL_TEXT.
CONCATENATE 'Date :' DL_TEXT INTO DL_TEXT SEPARATED BY SPACE.
* Add Date to Document
PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
CALL METHOD DG_DYNDOC_ID->NEW_LINE.
CLEAR : DL_TEXT.
* Move time
WRITE SY-UZEIT TO DL_TEXT.
CONCATENATE 'Time :' DL_TEXT INTO DL_TEXT SEPARATED BY SPACE.
* Add Time to Document
PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
CALL METHOD DG_DYNDOC_ID->NEW_LINE.
* Populating data to html control
PERFORM HTML.
ENDFORM.                    " EVENT_TOP_OF_PAGE
*&      Form ADD_TEXT
*       To add Text
FORM ADD_TEXT USING P_TEXT TYPE SDYDO_TEXT_ELEMENT.
* Adding text
CALL METHOD DG_DYNDOC_ID->ADD_TEXT
    EXPORTING
      TEXT         = P_TEXT
      SAP_EMPHASIS = CL_DD_AREA=>HEADING.
ENDFORM.                    " ADD_TEXT
*&      Form HTML
*       text
FORM HTML.
DATA : DL_LENGTH TYPE I,                           " Length
         DL_BACKGROUND_ID TYPE SDYDO_KEY VALUE SPACE. " Background_id
* Creating html control
IF DG_HTML_CNTRL IS INITIAL.
    CREATE OBJECT DG_HTML_CNTRL
         EXPORTING
              PARENT    = DG_PARENT_HTML.
ENDIF.
* Reuse_alv_grid_commentary_set
CALL FUNCTION 'REUSE_ALV_GRID_COMMENTARY_SET'
    EXPORTING
      DOCUMENT = DG_DYNDOC_ID
      BOTTOM   = SPACE
    IMPORTING
      LENGTH   = DL_LENGTH.
* Get TOP->HTML_TABLE ready
CALL METHOD DG_DYNDOC_ID->MERGE_DOCUMENT.
* Set wallpaper
CALL METHOD DG_DYNDOC_ID->SET_DOCUMENT_BACKGROUND
    EXPORTING
      PICTURE_ID = DL_BACKGROUND_ID.
* Connect TOP document to HTML-Control
DG_DYNDOC_ID->HTML_CONTROL = DG_HTML_CNTRL.
* Display TOP document
CALL METHOD DG_DYNDOC_ID->DISPLAY_DOCUMENT
    EXPORTING
      REUSE_CONTROL      = 'X'
      PARENT             = DG_PARENT_HTML
    EXCEPTIONS
      HTML_DISPLAY_ERROR = 1.
IF SY-SUBRC NE 0.
    MESSAGE I999 WITH 'Error in displaying top-of-page'(036).
ENDIF.
ENDFORM.                    " HTML
Regards
vijay

Plug-Ins in a delay feedback-loop

I would like to set plug-Ins in a feedback loop from a delay plug-In
maybe in a simalar way like this:
from a audio track "send", i route the send signal in a delay. the delay output goes after in other plugins (filter, reverb, pitch shifter) and comes back in the delay input, but only maybe maybe 20%-30% of the output volume.
Does anybody know how to do this routing?

Admittedly, I had not tried the routing I had posted. I was just "thinking it through"... evidentially, not very well...
I knew I'd read multiple posts over at Sonikmatter about this sort of thing. Here's the first one I came across doing a quick search:
http://community.sonikmatter.com/forums/index.php?showtopic=7282
See if that gets you closer to what you had in mind...

Gmail IMAP "Copying message" feedback loop

Yesterday I sent an email with 10mbs of attachments from mail.app through gmail imap. after the message sent, I noticed that the spinning icon next to the gmail inbox was perpetually spinning. in the 'activity' window, it says:
Gmail Synchronizing with server
copying message
I figured mail.app and gmail were synchronizing the email. so i let the process go for a few hours yesterday, when I noticed that no new email had come in via gmail, so i checked the account through the web browser. sure enough to find new email, but nothing coming through to mail.app. so i cancelled the process and but the activity status just said "STOPPING: copying message" and didn't go away. So I restarted mail.app. as soon as mail.app was back up and running, the "copying message" status reappeared.
Last night, I let the operation go throughout the night, to wake up this morning with nothing changed. So this morning I checked my "recovered messages (Gmail).mobx" folder to see several 345mb message files. I removed the whole "recovered messages (Gmail).mobx" folder to the desktop and restarted mail.app but I still have the same error.
Incidentals:
The original message with the 10mbs of attachments was a series of 47 photos. Originally, I had dragged full res photos(6-7mbs/photo) into a mail.app message and chose "medium" from the "image size" pop-up at the bottom pane of the message.
My theory is that in between placing the photos in the message and mail.app resizing them, mail.app and gmail tried to save a draft of the message to the server with all the photos at their original size (they might have been somewhere around that 345mb mark). And somehow mail.app is freaking out continually trying to upload a draft of the message with 345mbs of attachments. just a theory.
how do i get mail.app and gmail imap out this weird feedback loop?
Message was edited by: Ed Fladung

I had the same problem myself, except that the message contained over 200 pictures. The actual email was only 7MB, but Mail must have decided to create a draft before it resized the pictures. I only noticed the problem after Mail had consumed over 1.5GB of my limited bandwidth and was taking up almost 4GB in RAM, and a lot more in swap. The solution here worked, but it's unfortunate that I needed it at all. Why would I ever want Mail to upload attached photos to an IMAP server at their original size, especially after the final version of the email with resized photos has already been sent? This NEEDS to be fixed, since it could be a huge problem for someone who is less computer savvy.

How i can implement the desired format in ODI ??

Hi
i want to export data from table to file
but in file i have specific format like
Account Number :A123456
Cutomer 1
Customer 2
Customer 3
Account Number : B999999
Cutomer 4
Customer 5
Customer N
How i can implement this
plz suggest me possible solutions for this
thanks

Hi,
I have done this before by using three files. The first file contains the header row - in your case, I would create a variable which selects the account number via rownum for example (you could add another variable so you could increment the rownum until exhausted). Then in the first ODISqlUnload
select 'Account Number :'||#variable.account_number
from table.
This creates you header row in a file
Then, in a second ODISqlUnload, select the 'Customer' data for the account number into another file
select customer_details
from table
where account_number = #variable.account_number.
So you end up with a list :
Customer 1
Customer 2
etc etc
Then using an ODIFileAppend, append the two files created above in the final output file. Then loop round in a package for all your account numbers, using the two temp files, then append to the final output.
Your final output file, then looks like:
Account Number :A123456
Customer 1
Customer 2
Customer 3
Account Number : B999999
Customer 4
Customer 5

How do I implement a feedback loop to control a DC motor?

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