Migration Panel - NGA Migration

In the panel (see above) the value archives have corresponding default suggestions for the NGA groups. By default, the value archives are mapped "one-to-one" to NGA groups. This means that a 5 minutes archive is converted to a 5 minutes NGA group. By default, also the NGA group names are adapted to correspond to the names of the value archives.

1. One value archive can be mapped to one or more different NGA groups or to no NGA group.
   Note: If you do not map a value archive to an NGA group, the archive configs (referring to this value archive) will be deleted during the migration.
2. One or more HDB groups can be mapped to one NGA group.

You can select how to map the value archives to NGA groups freely. The Default mapping is "one-to-one".

• When you have configured the mapping for the HDB groups to the NGA groups, click on Save. If you want to create new groups, click the + button - see the description below.
  CAUTION:

  In the panel you configure the mapping between the value archives and the NGA groups. The project is, however, not yet changed.

  Once you migrate, the project is changed. Migrate ONLY if you ARE SURE about your changes.

• To convert the value archives to NGA groups, click on Migrate.

  

  The check box Automatic import on project start starts the NGA Import automatically and the necessary data points are automatically created. Note that the automatic data import is only possible if all archive groups are imported to a managed database. This means that you must select a managed backend from the Group Settings.

  Note: When selecting the check box Automatic import on project start no additional Importer-specific configuration (such as DPE Mapping) can be specified.

  The Group Settings, Storage Settings

  and Settings for managed PostgreSQL® database
  are described in the chapter Create new group.
  Note:

  The migration process will be completed only after starting the WinCC OA project. Conversion messages are shown in the log viewer of the project and saved in the InstallPath/log/PVSS_II.log. When the conversion is finished, the "WCCOActrl (1), 2022.11.15 11:36:27.336, SYS, INFO, 0, , _archive configs successfully updated" message is written to the PVSS_II.log file.

  If the migration process fails, the following error message is shown: WCCOActrl (1), 2022.11.29 14:53:17.032, SYS, SEVERE, 0, , Problem during _archive conversion..

• Start the WinCC OA project.
  Note: Note that the historical data will be imported in a later step.