Vector Element
For tag parameters not covered herein, see Tag Editor.
Vector tag uses another tag, which outputs an array, as its source. The array constitutes a data vector from which the vector tag retrieves an index-determined element.
Fig. 1. Vector element opened in the Tag Editor.
Source tag
Tag whose value is processed by the vector element; must supply vector data.
Index
Number of the element to retrieve from the vector. Indexing stars at 0. Thus, to retrieve 4 from a tag that returns [1, 2, 3, 4, 5, 6], must be set to 3.
If made writable, a vector element will be able to accept user input in the HMI, e.g., in Tag Lookup, and overwrite the specific index of the vector. The source tag does not have to be writable but its configuration must support writability.