In WinCC RT Advnaced, the HMI tags connected to PLC can have "Value Change" event, which is convenient and I believe is essential. I can use this to trigger a script to do complex tasks.

However, in WinCC Unified, this feature is no longer there?! See picture...

Did I miss any thing, or there is now new ways for this?

Thanks,

Hi cuitao02,

you have to defined new task in "Scheduled tasks" with trigger "Tags". 

This is only way what I found.