Your objective is to use the probe tool and the probe window and to examine data flow in the block diagram using execution highlighting.
Probes
If it is not already open from Activity 4, open the Convert C to F VI by selecting File»Open and navigating to labview\activity\solution\Convert C to F.vi.
Block Diagram
Select Window»Show Diagram.
If the Tools palette is not open, select Window»Show Tools Palette.
Select the Probe tool from the Tools palette and click the wire coming out of the Multiply function. A Probe window appears with the title [1] Probe and a yellow glyph with the number of the probe appears on the wire, as shown in the following illustration.
Note If automatic tool selection is enabled and you move the cursor over objects on the front panel or block diagram, LabVIEW automatically selects the corresponding tool from the Tools palette. However, you must manually select the Breakpoint, Probe, and Coloring tools.
Front Panel
Return to the front panel. Move the Probe window so you can view the probe value and both of the thermometer values. Run the VI. The value at the probe appears in the [1] Probe window.
Close the [1] Probe window by clicking the close box at the top of the Probe window title bar.
Execution Highlighting and Single-Stepping
Another useful debugging technique is to examine the flow of data in the block diagram using the execution highlighting feature.
Block Diagram
On the block diagram, begin execution highlighting by clicking the Highlight Execution button , in the toolbar. The Highlight Execution button changes to an illuminated light bulb .
Click the Run button to run the VI. Notice that execution highlighting animates the VI block diagram execution. Moving dots represent the flow of data through the VI. Also notice that data values appear on the wires and display the values contained in the wires at that time, as shown in the following block diagram, just as if you had probed the wire.
Begin single-stepping by clicking the Step Into button in the toolbar.
Click the Step Over button until the VI finishes executing.
Finish executing the block diagram by clicking the Step Out button in the toolbar. Clicking this button completes all remaining steps in the block diagram.