The “change window” option within the “PLC Control” object will only allow you to select numeric tags that are elements of an array. This is because the “change window” option requires both a trigger and write back address. Where the trigger is used to set the window number to navigate too and the write back is used by the HMI to confirm the window number when the navigation is finished.
If the element is not part of an array it will not display as an option within this menu because a single integer tag cannot be used for both the trigger and write back address. However, a non-array tag can still be used if you first transfer the value within that tag into HMI memory, such as LW-0, and then read LW-0 + LW-1 using the “change window” option within this object.
