This value indicates the primary reference time of the hwCfgOperateEntry
saved in the hwCfgOperateTable.This value is not valid if there is extra
space in the hwCfgOperateTable, that is, the hwCfgOperateEntry is not deleted
periodically.
If there is no space in the hwCfgOperateTable to save a new hwCfgOperateEntry,
the expired hwCfgOperateEntry that is unactivated or the hwCfgOperateEntry
that is processed may be deleted. Default value is 5.