my customer is asking for a sort of “Daily Journal table / Event List” where he expects to find a table like “Switch x moved from open to close state” or “Machine X started”. Consider we have a lot of digital and int/uint variable ( around 60000 ) but most of them are changing only a few times at day. Which is the best way to achive a sort of event list? Is still the only way to add a script to each variable like reported in this post?
Adding a new alarm journal with a filter on “alarm/display/path” for those particular tags and to them a “description state” alarm can be a good idea?
How can then avoid to record this alarm also in the “main” alarm_event and alarm_event_data table? Does this big amount of alarm ( i.e. OnTime calculation and so on ) affect my gateway performance?
Thank in advance, best regards, Andrea.