Hi All,
we would like to use the DeltaV Excel Add-in to overwrite the on-line values in the controller. Is there any audit trail to track the changes done via OPC in DeltaV? We would like to "import" thousands of configuration parameters like this and we need somehow to track these changes.
Many thanks,
Adam
In reply to Youssef.El-Bahtimy:
There is a registry setting in DeltaV that disables logging of OPC server writes by default. The "journalDisabled" key is set to TRUE so that continuous OPC writes don't fill the Event Chronicle. Setting this key to FALSE enables the logging of all Writes from the OPC Server on that computer. It also adds the writes to the Upload files so the value can be uploaded into the database.
In a quick check with OPCWatchit, parameter writes are captured in the event chronicle with the interactive user and workstation node recorded, and the Module upload file also has the values captured. You have to restart the OPC client to read the key and change behavior.
NOTE: WARNING: CAREFUL: All OPC clients on the OPC server where this feature is enabled will log all writes. This is an OPC Server setting, not a client setting. Do NOT enable this on an OPC Server that is continually writing OPC data into DeltaV modules. Use a different node (Pro Plus or a different Application station) that only performs on demand writes, such as one time writes from the DeltaV Excel add in.
IF you are not comfortable with adjusting the registry key, contact your local representative or Emerson sure service provider and they can assist you. You can also look into using a Batch file to enable and disable this feature so you don't have to access the registry manually.
Andre Dicaire