Try to add a MW or MD word instead of a bit.
The trigger bit is the bitno in the word.
edit: I notice that all the alarm bits are tagged with an individual tagname, i.e. Alarmword_200.x0, Alarmword_200.x1 etc
what is the address of these tags ?
I think this is a misunderstanding of how it works. Define just a word or doubleword, and then the triggerbit number refers to the individual bits within the word.
I use a DB array for alarms, and then have only one Tag of for example 64 datawords to have 1024 Alarms.
Another thing I notice in your first screenshot.
You have a direct condition for the alarm bit. If the condition is only active very shortly it will be a matter of random chance that the HMI gets to see the alarm bit being TRUE.
Think about that every alarm bit that the HMI is monitoring should be latched on (S) and then reset by another method, either a physical pushbutton or an akcnowledge bit from the HMI.