Using fieldbus technology in the control strategy > Fieldbus control strategy procedures

Configure fieldbus block parameters

If it is not already selected, select the AI block, and you will see its default set of parameters listed in the parameter pane. In order for the device to work properly, you must configure the device's parameters.

  1. In Control Studio, double-click Filtered by at the top of the parameter list.


    This opens the Parameter Filtering dialog.



  2. Click the Select All button to make all parameters visible to you.

    The CHANNEL and XD_SCALE parameters must be correctly configured for AI and AO blocks or a configuration error will occur when the device is downloaded.



    Let's take the CHANNEL parameter as an example of how to configure a parameter. Because each device may be capable of more than one measurement, when you configure an AI block, you specify which measurement you want the block to process. The value for the CHANNEL parameter tells the block which measurement to process.

  3. Double-click the CHANNEL parameter to open the Properties dialog for this parameter. The device manufacturer publishes valid values for the channels, and much of this information is available in DeltaV Books Online.
  4. Enter that value in the Value field and click OK.

Now you know how to configure a parameter for a block. Experiment with Control Studio and open the Properties dialogs for other AI parameters or drag another block onto the diagram and look at its parameters. When you are ready, configure the other blocks in your control strategy. Consult the device documentation for recommended parameter values. Then, connect all inputs and outputs, assign the strategy to a node, and save and download the strategy.