You can download the control module from the Explorer or from Control Studio. In order for extended block parameters to be sent to the device during the download, you must check the function block on the download dialog (the DeltaV software does this for you when a parameter has been changed in the configuration database). When the function block is checked, the values of all configurable parameters in the extended block are sent to the device for update. This technique is the least efficient and most time consuming method of making function block parameter changes in the device. The high level of communication that occurs on the H1 segment during this type of download does not impact control, but can result in slower display response at the Operator Station.
When possible, it is better to change fieldbus function block parameters from the Operator Station or Control Studio online than to download. To update the values in the configuration database after making a change from the Operator Station or Control Studio online, use the DeltaV Explorer or Control Studio to upload the module.