I need to have a few buttons on the HMI touch screen that the user can change the text on. I'm doing this by displaying a text field above the button & the text field is tied to a HMI Tag. These tags have nothing to do with the PLC, so they can be internal tags to the HMI.
Obviously if the power is lost then I want to retain the latest entry of the tag, and if the user powers up the HMI for the first time, then I need a default title for the buttons.