Input and Output tags, both analog and digital, have an Owner tab on their tag properties folder.
VTS supports the concept of owner/contributor (also referred to as container/contributor) relationships among tags, where multiple contributor tags can supply their values to an owner or container tag. An owner tag's value is determined by a mathematic function of the values of its contributor tags. An example of an owner/contributor relationship might be at a power generation station, where the owner tag would calculate the overall power output for the entire station based on the value of its many contributor tags. Within a contributor tag, you can select the owner tag and specify how the contributor’s value should be used.
Note: You must write your own Owner tag. This requires a good knowledge of VTS programming techniques. Please see the VTS Programmer’s Guide for instructions on creating a custom tag.
Owner
The Owner field enables you to specify a tag to which this contributor should supply its data. Establishing an owner/contributor relationship also allows standard tags to monitor custom tags without prior knowledge of the number of each tag type required.
The owner tag may keep track of different aspects of each contributor's data, from the presence of a user-defined manual data value, to questionable data, according to the configuration of the checkboxes appearing beneath the Owner field. These checkboxes also determine the way that this contributor tag's value should be used in the owner tag's calculations.
Record Data Quality
An owner tag may keep track of the quality of the data for each of its contributors. When selected, the Record Tag Quality checkbox enables you to increment the owner tag's count of the number of tags that are contributing quality data by 1, and decrement this count by 1 when this contributor is not supplying quality data.
Record Tag Validity
An owner tag may keep track of the questionable status of the data for each of its contributors. When selected, the Record Tag Validity checkbox enables you to increment the owner tag's count of the number of tags that are contributing questionable data by 1, and decrement this count by 1 when this contributor is not supplying questionable data.
Record Use of Manual Data
An owner tag may keep track of the number of contributor tags that are providing manual data (user-defined values), rather than reading data from their I/O device. When selected, the Record Use of Manual Data checkbox enables you to increment the owner's count of the number of tags that are contributing manual data by 1 when manual data has been provided for this contributor, and decrement this count by 1 when no manual data value has been specified.
Set Active/Unack. Priority
An owner tag may keep track of the alarm priority and status of its contributors. When selected, the Set Active/Unack. Priority checkbox causes the owner tag to keep track of the priority of the contributor's active alarm (or records an Invalid if the contributor is not currently in an alarm state). Selecting the Set Active/Unack. Priority checkbox also causes the owner tag to record whether or not the alarm has been acknowledged.
Set Owner\Data(n)[…] To Value
When selected, the Set Owner\Data0[…] To Value checkbox enables you to set the value of this contributor tag as the first element in the owner tag's array. You may choose to set this contributor tag's value in more than one of the owner tag's array elements if required.