Discrete history attributes

Enable history

Historized

If enabled, the system will historize the Field Attribute value.

None

Force storage period

ForceStoragePeriod

The time interval, in milliseconds, at which the value must be stored, even if the value has not changed. A value of 0 disables this feature. As an example, a setting of 3600000 indicates the value must be stored once per hour (measured from the time the object was last put onscan). If this value is less than the scan period of the host object, forced storage will occur every scan period (effectively equivalent to setting a value deadband of 0).

Supervisory, User

Sample count

SampleCount

Obsolete. Do not use.

Supervisory, User