Persisted tags

The ControlLogix, GuardLogix, SoftLogix, CompactLogix and FlexLogix controllers have an option to use Persisted Tags for uploading the tag database from the file. This feature will improve the tag database upload time.

When the Communication Driver is activated with the Persisted Tags option selected, it reads the tags from the controller and stores them into a file under the bin\CIPTagDB directory.

If the version of the tag database matches the tag database file persisted from the last run, the ABCIP Communication Driver will skip the tag database upload option and use the persisted file as the basis of the tag database.

If the Communication Driver detects the controller database version is different from the version stored in the file, it will read the tags from the controller and synchronize the file.

The subsequent restart of the Communication Driver will read the tag database from this file. This file will store the database major and minor version information.

Important: If secured controllers (password protected), are a part of your hierarchy, changes in the Persisted Tags functionality will occur. See Tag database from file options matrix for a detailed description of each option.