IBM 3590 - Manual (Page 79)

magazine cell. This allows the operator to insert specific cartridges into the
priority cell. The magazine accumulates processed cartridges for pickup by
the operator.
When the ACF is in Accumulate mode, the following applies (see also “ACF
Notes” on page 56):
v Initial conditions
– Accumulate mode must be selected from the SET ACF MODE menu.
– We recommend that, initially, the magazine be empty, even though this is
not a required condition.
– All magazine cells have the cell-status indicator LEDs set to in-use
(steady green). This indicates to the operators that they should not place
cartridges in the magazine (only remove cartridges). This is to remind
the operator that the entire magazine is reserved as the accumulate
hopper.
v Enabling condition: Two ways to enable Accumulate mode follow:
– Insert a cartridge into the import position of the priority cell.
v Disabling conditions: The ACF becomes disabled in Accumulate mode as
follows:
– The magazine is full, and the last imported cartridge is returned to the
priority cell.
– An attention condition is detected in the ACF; for example, an extra
cartridge condition.
v Operation:
1. If the ACF is disabled and in Accumulate mode, the ACF becomes
enabled when a cartridge is inserted in the import position of the
priority cell.
2. When a cartridge is inserted into the priority cell, the cartridge sets the
cell-status indicator LED to in-use (steady green) for the priority cell. It
then waits for the device to become available.
3. When the device is available, the cartridge is loaded in the device, and
the priority cell indicator LED is turned off.
4. When a cartridge is unloaded from the drive, it is moved to the
magazine. The ACF places the cartridge in the top cell of the magazine
unless that cell is occupied. If the top cell is occupied, the ACF searches
down the magazine for the next available cell. Each cartridge is placed
in the export position.
5. When the last available cell in the magazine is filled, the ACF warns the
operator by activating all magazine cell-status indicator LEDs. They
show alert (steady yellow). If another cartridge is unloaded, it is placed
Chapter 4. Automatic Cartridge Facility (ACF) and Magazine 59