...
It can contain the reference to a column of an object of the Structured variable type in the form ObjectName[0]^ColumnName. In such a case, the KOM process tries to copy the values of arrays with the start address which is configured in tab Address to the relevant column of the structured variable. There is no need to create individual I/O tags for each item of an array or for some other repeated address structure. Only selected communication protocols support this functionality. More additional information is mentioned in the description of a particular communication protocol.
Note: it is also possible to use a non-zero index, e.g. SV.MyVal[7]^MyCol - in this case, values are written into the structured variable starting with the specified row (in example 7).
The copying of values into the column of a structured variable is implemented only for input, the change of a particular value of a structured variable (e.g. in HI or via event) will not be transferred as output through the communication into the device.
...