IBM 3590 - Manual (Page 78)

– An attention condition is detected in the ACF; for example, an extra
cartridge condition.
– The magazine is not installed; choosing Start causes the ACF to return to
the disabled state.
v Operation
1. If the ACF is disabled and in Manual mode, and the operator chooses
Start on the operator panel, the ACF becomes enabled. It then verifies
that at least one cartridge is in the import position of the magazine. If
so, the ACF indexes down the magazine until it finds the first cell with
a cartridge in the import position. The ACF sets the cell-status indicator
LED for that cell to in-use (steady green) and moves the cartridge from
the cell to the device.
2. If the ACF is disabled in Manual mode with a cartridge placed in the
priority cell import position, the ACF loads the cartridge in the device.
It then sets the cell-status indicator LED to in-use (steady green) for the
priority cell.
3. If the ACF is enabled in Manual mode with a cartridge placed in the
priority cell, the ACF sets the cell-status to in-use. The indicator LED is
steady green. When the ACF completes its current operation, the ACF
automatically loads the priority cell as described in step 2.
4. When a cartridge that was loaded while in Manual mode is unloaded, it
is returned to its original cell if possible. The in-use indication is then
turned off. If the original cell is occupied, the ACF turns off the in-use
indicator LED and puts the cartridge in the priority cell, if possible. It
then sets the priority cell status indicator LED to alert (steady yellow). If
the priority cell is occupied, the ACF is disabled, and it presents check
status (see step 9 on page 57). The cell-status indicator LEDs for all cells
are set to attention (flashing yellow). An intervention message is posted
on the operator panel.
Accumulate Mode
Some customers organize their operations so that certain subsystems focus on
specific cartridge mounts. Thus, the entire device is dedicated to responding
to servicing specific volumes that are requested by the attaching host. For this
type of operation, the customer needs the ability to easily insert specific
cartridges. And to allow processed specific mounts to accumulate in a hopper
until it is convenient for the operator to retrieve a group of cartridges.
In Manual, Automatic, and System mode, cartridges are exported to the same
ACF cell from which they were imported, if possible. This makes them
convenient for processing scratch volumes. Accumulate mode differs in that
cartridges are always imported from the priority cell, and exported to a
58 3590 Operator Guide