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Creating Temporary Tags in Faceplates for Confirmation Logic

Yes, you can achieve this using internal tags within the faceplate to implement a confirmation mechanism before writing to a PLC tag.

Here's a common approach:

1. Create Internal Tags: Define internal tags within your faceplate (e.g., 'TempChoice') to store the user's selection from the choice buttons.
2. Choice Buttons: Configure the choice buttons to write the desired value (1 or 2) to the 'TempChoice' internal tag.
3. Confirmation Button: Create a "Confirm" button. When pressed, this button's action will read the value from 'TempChoice' and write it to your PLC-connected tag.
4. Reset 'TempChoice': After confirming, reset the 'TempChoice' tag to a default value (e.g., 0) to prepare for the next selection.

Example in TIA Portal:

Within the faceplate's VB script or HMI tags, you can manage these internal tags and the logic for transferring the value to the PLC.

For detailed guidance, refer to the Siemens documentation:

• Creating and Using Internal Tags in HMI
• Faceplate Design in TIA Portal

SiePortal Resources: You can find further examples and discussions on the Siemens Industry Online Support forum via SiePortal.