Select Points to Debug

Note: A many to one NVI in Lon Spyder cannot be selected for debugging.

To select points that you need to debug:

  1. Click the SelectPt button on the tool bar. The Select Points dialog box appears. The following table defines the fields shown in the dialog box.
Name Definition
Select Function Block Shows all the Function Blocks, SBus wall module, Conventional wall module, Physical I\Os, Network Variables, Bacnet Objects, and Software Inputs that are not constants that have output points and are connected to other functional blocks or network variables. It also displays all OUT parameters of both SBus and conventional wall modules.
Select Output Points Shows all the output points of selected Function Blocks, SBus wall module, Conventional wall module, Physical I\O, Network Variables, Bacnet Objects, and Software Inputs that are not constants and are connected to other functional blocks or network variables.
Watch Window/ Shows the selected output points that appear in the watch window. You must select the option to view points in watch window check box to be able to see the values in the watch window.
Point Name Shows the values of the output points in the watch window.
Select point path Indicates the location of the component. It is a relative and not an absolute path
Select point ord Indicates the absolute path. It can be used to resolve the component.
OK Saves the selected points to be debugged and closes the dialog box.
Cancel Closes the dialog box. Any operation done so far is cancelled.
  1. Select the Function Block or Network Variable or Bacnet Object from the Select Function Block section. The output points are shown in the Select Output Points section.
  2. Select the output points that you want to view. The selected points appear in the Watch Window or Point Name section.
  3. Select the check box of the point you want to view in the watch window.

Note: Use the Select All option to select all points selected for debugging to be displayed in the watch window.
You can use the left arrow button to remove the selected points to the Select Output Points list. This removes the points from being selected for debugging or from being shown in the watch window.
If you select All in the Select Function Blocks list and double-click it, all points are shown in the third column with the watch window option checked.

  1. Click OK. The points appear in the watch window.

View Values in Watch Window

You can select points for debugging in the Engineering and Online Debugging modes. However, the selected points are displayed, in a watch window at the bottom of the wiresheet, only in the Online Debugging or Simulation modes. Use this to analyze your application logic and to find the field values being returned based on the logic you have defined.

To hide or display the watch window:

The watch window disappears or appears from the wiresheet.

Changes in Select Points Screen On Changing Modes

  1. If you select a point for debugging & check the watch window option in Engineering or Online Debugging mode, the same is retained in Simulation mode.
  2. If you select a point for debugging & uncheck the watch window option in Engineering or Online Debugging mode, the same is not retained in Simulation mode.
  3. If you select a point in the Simulation mode, the same point is retained in the Engineering or Online Debugging mode with watch window enabled.
  4. If a point selected for debugging & not for watch window in the Engineering or Debugging mode is selected in the Simulation mode, the point is retained in the Engineering or Debugging mode with watch window enabled.
  5. If you add and remove a point in the Simulation mode, the same point is displayed as selected for debugging but not for watching in the Engineering or Online Debugging mode.
  6. Select a point in Simulation mode. Move to the Engineering or Debugging mode and select the point for for both debugging & watching. Now, remove the option for watching. Move to the Simulation mode. The point is not shown in the simulation mode.

Related Topics

Force Values

Online Debugging