All channels update

[stephen s]

If I am not mistaken, LABView DSC stores changes in values in the database, and only adds a new value when there is an update.

I have some valves and setpoints that remain constant for several hours at a time. When I look at the data (extracted to a text file), I can see that after a while, the value in the database changes (or expires or something). Thus, a setpoint that may be constant at a value for a period of time may appear to have changed to zero.

Is there a way to "refresh" all channels to the database? I want ensure that no value in the database is more than 5 minutes (or other arbitrary time frame) old. For example, to force the database to store all values, changed or not, to the database every 5 minutes or so? And then it can sto
re changes between the states. Kind of like A & B frames in compressed video...

How can I do this?

[Roli]

In the tag configuration editor you can configure the Historical database. There you should find a setting called "max time between logs". If you enable this setting and set the value to 5 minutes it will do the job you are looking for.
Hope this helps
Roli

[stephen s]

Thank you.