Serial devices and the DeltaV system > Using serial data in control strategies

Write an AI value to a specific dataset register

  1. Create a module containing an Analog Input block.
  2. Double-click the IO_IN parameter, and then click Browse to select a specific analog input channel.
  3. If desired, scale the analog input value using the XD_SCALE, OUT_SCALE, and L_TYPE parameters.
  4. Add an Internal Write parameter to the diagram. The Internal Write parameter is on the Special Items palette.
  5. Modify the properties of the Internal Write parameter by selecting a parameter type of External Reference.
  6. For the External parameter path field, click Browse. 
  7. In the Browse dialog, select System Configuration in the Look in field.
  8. Select DST Parameters in the Object Type field.
  9. Starting at Physical Network, drill down until the dialog contains DSTs. The list includes dataset tags.
  10. Double-click the dataset tag that contains the parameter (register) that corresponds to the dataset value to which you want to write.
  11. Double-click the parameter.
  12. Wire the AI block's Out parameter to the Internal Write parameter. 
Note

Any value that is on the Output side of the AI block is written to the serial device regardless of the status of the AI block.