Creating datalinks

Create a datalink for the tank level

  1. Click the Datalink Stamper button in the Toolbox.

    The Datalink dialog appears.

  2. Click the ellipsis button to search for the parameter reference.

    The Expression Builder dialog opens.

  3. Select Browse DeltaV Control Parameters to open the Browse dialog. (This may take a few seconds.)
  4. If TANK-101 is not displayed in the Look in: field, click the Up One Level button to go to Control Strategies, and then double-click the TANK-101 area.

    You can use the Up One Level button to move up one level in the hierarchy. The contents of the selected level are displayed in the list box.

    A list of the modules assigned to the TANK-101 area is displayed.

  5. Double-click the module name, LI-101. A list of function blocks and module-level parameters is displayed.
  6. Double-click the AI1 function block. A list of parameters is displayed for that function block.
  7. Double-click the PV parameter. A list of fields is displayed.
  8. Click the CV (current value) field, and then click OK. (Alternatively, you can double-click the CV field.)

    DeltaV Operate assembles the node, tag, and field information and enters it into the Expression Builder dialog.

  9. Click OK to return to the Datalink dialog.
  10. In the Datalink dialog box, in the Formatting group, select Numeric for the Type, and then click OK.

    If you have not assigned the module to a controller or if you set up a placeholder controller, you may get a message about the parameter reference not existing. Click Use Anyway to use this parameter reference for the tutorial.

    Note

    DeltaV Operate reads the datalink and automatically configures the settings in the Datalink dialog.

    The stamper and datalink appear and "float" on the picture.

  11. Click the upper left quadrant to place the datalink on the picture. (Refer to the picture in the Creating Datalinks topic for the approximate location.)

    The datalink appears on the picture as #####.##, surrounded by handles.

  12. To label the datalink, click the text button in the Toolbox, click to the left of the datalink, and type LI-101/PV.

    Click anywhere to change the pointer back to an arrow.

    Tip

    To move any object, you can select it and drag it to a new location. You can use the alignment tools to align objects horizontally and vertically. You can also use the arrow keys on the keyboard to make minor adjustments to the position of any selected object.