Access secured Logix5000-series controllers

When Logix5000 controllers are secured (Password protected), accessing the program version number will fail. When the controllers are secured, the tag database in the ABCIP Communication Driver may not be in-sync with the controller tag database.

If the run-time tag database synchronization has not been turned off and the controller is unsecured, the ABCIP Communication Driver will re-sync the tag databases at the next re-synchronization interval.

When the controller is secured an error is returned to the ABCIP Communication Driver indicating that the controller is secured and a message will be logged indicating that tag database re-synchronization failed because the controller is secured.

Because re-syncing is still running at the re-syncing interval, if the controller goes from secured to unsecured, the tag databases will be re-synced if necessary and a message will be logged indicating that the controller is unsecured.

The system variable $Sys$DeviceSecurity will indicate if the controller security is On or Off.

You can turn on or off, through configuration, the tag database re-syncing, to minimize the traffic between ABCIP Communication Driver and the controller.

Note: The server can be started and in-sync with the controller, and the controller can be secured and un-secured with no changes, so that the server is still in-sync with the controller. Even though the controller is secured, the tag database can still be uploaded. The error returned from the controller when the controller is secured is only on the program version check.

The Auto-synchronize tag functionality matrix and Persisted tag functionality matrix show when a tag database upload will occur or not occur based upon security.