User`s guide

Remarks
Although you can assign a name to location 0, the name will be
overwritten when the power is cycled and a new power-down state is
stored in this location.
When shipped from the factory, default names are assigned to storage
locations 0 through 4. The default names are "POWER_DOWN",
"STATE_1", "STATE_2", "STATE_3", and "STATE_4".
If you omit the <name> parameter, the default name is assigned to the
specified storage location. This provides an easy way to reset the
associated name to its factory default; however, the stored state is not
deleted.
Deleting the contents of a storage location (see MEMory:STATe:DELete
command) will reset the associated name to its factory default
("POWER_DOWN", "STATE_1", "STATE_2", "STATE_3", and "STATE_4").
A Factory Reset (*RST command) does not affect the configurations stored
in memory. Once a state is stored, it remains until it is overwritten or
specifically deleted.