The completed Labview diagram should now look like the picture below:

Size: px

Start display at page:

Download "The completed Labview diagram should now look like the picture below:"

Reynold Hodge
5 years ago
Views:

below. (Note: The balloons have been added for clarification.

1 The completed Labview diagram should now look like the picture below: Switch to the Labview Front Panel Window and rearrange the front panel as shown below. (Note: The balloons have been added for clarification. You will not see these on your Labview front panel.) 16 April 2008 Beckhoff Application Notes 21

2 Labview in RUN Mode This is what your Labview project should look like in the RUN mode. The number of iterations should be counting up. Flagging the Beckhoff KL1104 channel 1 input should cause the pdata indicator to turn on and off matching the state of the real world input. To stop the Labview application press the STOP PB we made on the front panel or you can also press the red stop sign icon in the menu bar area. Add a Second Digital Input Channel Stop the Labview application and return to the Labview connection diagram. Adding a second digital input will be much less time consuming. Rubber band around the original AdsOcx Invoke Node object, the numeric constants, the indicator, and the Local Variable for the indicator. Now, while holding down the control key, drag the selected items continuing to hold down the control key. After you have moved far enough to the right with the copy you can release the left mouse button and the Control key. A copy of everything you selected has been made. 16 April 2008 Beckhoff Application Notes 22

You can now edit the constants and the name of the newly created indicator as shown below. Again, use the TwinCAT System Manager to find the values to enter for the new constants.

3 You can now edit the constants and the name of the newly created indicator as shown below. Again, use the TwinCAT System Manager to find the values to enter for the new constants. Add a Third Digital Input Channel Again, rubber-band around the AdsOcx object, the numeric constants, the indicator, and the Local Variable of the indicator. Use the Control key and Left mouse drag to create another copy of everything needed for the next channel. 16 April 2008 Beckhoff Application Notes 23

4 Edit the values using the TwinCAT System Manager to ensure the correct values are being used. Add a Fourth Digital Input Channel Again, rubber-band around the AdsOcx object, the numeric constants, the indicator, and the Local Variable of the indicator. Use the Control key and Left mouse drag to create another copy of everything needed for the next channel. 16 April 2008 Beckhoff Application Notes 24

5 Edit the values using the TwinCAT System Manager to ensure the correct values are being used. As the new indicators were being copied in the Labview connection diagram, they were getting placed all over the Labview front panel. Open the front panel window as much as possible and move all the indicators to positions as shown in the running Labview application window (see below). 16 April 2008 Beckhoff Application Notes 25

Add AdsSyncWriteBoolReq Copy just the AdsOcx object without the numeric constants or indicators and move it to an open spot inside the While Loop.

6 Put the Labview application in run and flag each input with 24VDC. Make sure the correct indicator light is coming on in the Labview front panel virtual instrument. Add AdsSyncWriteBoolReq Copy just the AdsOcx object without the numeric constants or indicators and move it to an open spot inside the While Loop. If the While Loop is not large enough, click on the edge of the loop structure and grab a handle at an edge to open the structure as needed. Now, right-click with the mouse pointing at the TOP most blue box of the AdsOcx object. This time choose the method, AdsSyncWriteBoolReq. 16 April 2008 Beckhoff Application Notes 26

Turning Digital Output On Wire from the last digital input AdsOcx object to the one we just created. The Blue-Green wire is the reference to the AdsOcx Control on the Labview front panel.

7 Turning Digital Output On Wire from the last digital input AdsOcx object to the one we just created. The Blue-Green wire is the reference to the AdsOcx Control on the Labview front panel. The Pink wire contains error information. See the finished Labview project included with this document for an example of decoding the error information. You can copy the numeric constants by rubber-banding and doing a control key and click drag from any where you need them on the connection diagram. Wire the numeric constants to the new AdsOcx object and edit the values as shown. Continue to note the relationship of these values to the TwinCAT System Manager variables. 16 April 2008 Beckhoff Application Notes 27

The AdsOcx object does not require something connected to both side of the pdata item in this

8 Right-click on the left side of the pdata item in the AdsOcx object and select Create, then Control. We will not have to create a local variable of the control. The AdsOcx object does not require something connected to both side of the pdata item in this instance of the object. Label the control we just made (see below). Wire the control to the AdsOcx object. 16 April 2008 Beckhoff Application Notes 28

9 Return to the Labview Front Panel Go to the Labview front panel and re-arrange the objects as shown below. Put Labview in the RUN mode and toggle the digital output. Make sure the first channel output light on the Beckhoff KL2012 module is going on and off based on the Labview control's state. Add the second digital output channel by copying the objects from the first digital output in the Labview connection diagram window. 16 April 2008 Beckhoff Application Notes 29

Use the TwinCAT System Manager to make sure the numeric constants are changed to the correct values. The items to look for in the TwinCAT system Manager are shown below.

10 Use the TwinCAT System Manager to make sure the numeric constants are changed to the correct values. The items to look for in the TwinCAT system Manager are shown below. Re-arrange the controls on the Labview front panel as shown, below, and put Labview in RUN mode. Toggle the outputs and make sure both function correctly. We now have complete control of all the Beckhoff Digital I/O in the Labview application. 16 April 2008 Beckhoff Application Notes 30

11 Adding Beckhoff The next steps explain the addition of Beckhoff. Analog Input To get an analog input, copy one of the AdsOcx objects and the numeric constants wired to it to a blank location inside the While Loop. Remember to wire the Blue-Green and Pink wires from the last AdsOcx object we made for digital outputs to the new blank AdsOcx object we are working with now. Right-click with the mouse pointing in the TOP blue box of the AdsOcx object, go to Methods, and select the method, AdsSyncRead- IntegerReq. 16 April 2008 Beckhoff Application Notes 31

Right-Click on the indicator just created and create a Local Variable of that indicator. Right-click on the Local Variable just created and Change To Read.

12 Use the TwinCAT System Manager to determine the correct values to be entered for numeric constants. On the right side of the pdata item in the AdsOcx object right-click, select Create, and then select Indicator. Rename the indicator as shown to the left. Right-Click on the indicator just created and create a Local Variable of that indicator. Right-click on the Local Variable just created and Change To Read. Create the second analog input channel by making a copy of the AdsOcx object, the numeric constants, the analog indicator, and the Local Variable of the first analog indicator made in the last step. 16 April 2008 Beckhoff Application Notes 32

Analog Output To write to an analog output, copy an AdsOcx object and drag it to an open area inside the While Loop.

13 Use TwinCAT System Manager to enter the correct data into the numeric constants. Edit the name of the second analog channel control as shown in the picture, below. Analog Output To write to an analog output, copy an AdsOcx object and drag it to an open area inside the While Loop. Point the mouse at the TOP blue box in the AdsOcx object, Right-click, select Methods, then select the method, AdsSyncWriteIntegerReq. Wire the Blue-Green and Pink wires from the last AdsOcx object to the new one being edited now. 16 April 2008 Beckhoff Application Notes 33

14 Edit the numeric constants for the first Beckhoff Analog Output, KL4032 channel 1, as shown below. 16 April 2008 Beckhoff Application Notes 34

15 Create the second Beckhoff KL4032 output for channel 2 as shown below. Be sure and edit the numeric constants to match channel 2 on the KL April 2008 Beckhoff Application Notes 35

16 Arrange the Labview Screen and Test the I/O The Labview front panel will need to be re-arranged. When adding objects in the connection diagram, the associated object in the front panel tends to get placed quite a way away the already placed controls on the screen. Arrange your Labview screen as shown in the picture below. Put the Labview project in RUN mode and test all the Beckhoff I/O against the Labview virtual instrument's controls. Verify everything works as expected. 16 April 2008 Beckhoff Application Notes 36

The +/- 10 VDC analog module in this example generates values based on counts. 0 counts = 0 DC volts. 32767 counts = +10 VDC. -32768 counts = - 10 VDC. Use a volt meter to confirm this is accurate.

17 The +/- 10 VDC analog module in this example generates values based on counts. 0 counts = 0 DC volts counts = +10 VDC counts = - 10 VDC. Use a volt meter to confirm this is accurate. It s a good idea to put a short time delay in a Labview While Loop so the computer s CPU is not being totally monopolized by the Labview application. Even a value of 1 millisecond is enough to allow the computer s operating system some space to perform other tasks. Go to the Labview diagram and add a 1 millisecond time delay inside the While Loop Remember to save your work 16 April 2008 Beckhoff Application Notes 37

How to set up an Amazon Work Profile for Windows 8

How to set up an Amazon Work Profile for Windows 8 Setting up a new profile for Windows 8 requires you to navigate some screens that may lead you to create the wrong type of account. By following this