Enable history

Check this property if you want to use history for this tag.

Storage period(ms)

Enter period of saving values in operating memory or in general database that you can setup in Project properties->Events/History tab. For History DB that are configured in Databases tab it doesn't work. For History DB you setup period of storage in its properties.

Store in DB

Check this property if you want to store data in general history database that you can setup in Project properties->Events/History tab. For History DB that are configured in Databases tab you have to add this tag in the Collection. To have possibility to add tag in the Collection of History DB you no need to check "Store in DB" property.

Use deadband

Check this property if you want to use hysteresis for storage history information. If the tag's value minus the last saved tag's value less than value set in Deadband property the tag's value will not be saved in the general database. This property works only for general database that you can setup in Project properties->Events/History tab. For History DB it doesn't work.

Deadband

This property contains deadband (hysteresis) value.