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):

vInitial 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.

vEnabling condition: Two ways to enable Accumulate mode follow:

Insert a cartridge into the import position of the priority cell.

vDisabling 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.

vOperation:

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

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IBM 3590 manual Automatic Cartridge Facility ACF and Magazine