Query tag details

You can view the configuration details for specified tags.

To view tag details

1. In the Query Type list in the toolbar, select Tag details.

2. Use the Tag Picker to select one or more tags.

3. In the Columns pane, select the Columns tab.

4. Select which columns to include in the query results. The options that are available in this tab depend upon the type of tag you have selected. For example, a detector type only applies to event tags.

   The Tagname column is always shown.

   • Description: The description of the tag.

   • Date created: The date that the tag was created.

   • Address: The tag address, which is made up of the application name of the I/O Server, the name of the topic, and the address string of the tag.

   • Storage rate: The rate at which the tag is stored if the storage type is cyclic.

   • Acquisition rate: For polled tags of acquisition type 1, the poll rate in milliseconds.

   • Storage type: The type of storage defined for the tag. 0 = Not stored; 1 = Cyclic; 2 = Delta; 17 = The storage type has been changed from cyclic to "not stored." 18 = The storage type has been changed from delta to "not stored."

   • Acquisition type: The method by which the tag's value is acquired. If the tag value is acquired from an I/O Server, the name of the I/O Server, topic, and item must be specified. 0 = Not acquired; 1 = Acquired via an I/O Server; 2 = Acquired via MDAS or a manual update; 3 = System driver.

   • Messages: The message associated with the FALSE state of the discrete tag. A discrete tag set to 0 is in the FALSE state. Also, the message associated with the TRUE state of the discrete tag. A discrete tag set to 1 is in the TRUE state.

   • Maximum characters: The maximum number of characters for the string.

   • Raw value range: The minimum value of the raw acquired value. Also, the maximum value of the raw acquired value.

   • Engineering units: The unit of measure.For example mph, grams, and pounds.

   • Engineering units range: The minimum value of the tag, measured in engineering units. Also, the maximum value of the tag, measured in engineering units.

   • SourceTag: The source tag of the tag.

   • SourceServer: The source server of the tag.

   • Detector type: The name given to the type of detector.

   • Action type: The name given to the type of action.

   • Detector string: The script that contains the criteria for event detection. Detector scripts are executed on the local AVEVA Historian.

   • Action string: The script that specifies the event action. Action scripts are executed on the local AVEVA Historian.

   • Scan rate: The interval, in milliseconds, at which the system will check to see if the event conditions specified by the detector have occurred. This value must be greater than or equal to 500 milliseconds, and less than or equal to 1 hour (3600000 ms).

   • Status: The flag used by the event system at system startup and during runtime to determine if the event tag has been modified. 0 = Posted. Any changes have been detected and effected by the system. 1 = New. An event tag has been inserted, but is not yet executing. 2 = Modification. An event tag has been updated, but the older one is already executing. 98 = Disabled. 99 = Disabling requested. The event tag does not execute, even though the definition still exists in the schema. Note that there may be a delay of up to 30 seconds before a change in an event tag is seen by the running system.

   • Logged: Used to specify whether or not to log events for this tag into the EventHistory table. Event logging can only be turned off if no associated actions are configured.

5. To view the results, select the Data tab in the Results pane.