Random mode must be selected from the SET ACF MODE menu. v Enabling conditions: Random mode is enabled if all the following

conditions are met:

The magazine is installed in the ACF.

The magazine lock is in the locked state.

A valid Move Medium command is received.

vDisabling conditions: The ACF is disabled in Random mode if one of the following conditions are met:

The magazine is removed from the ACF.

The magazine is unlocked.

An attention condition is detected in the ACF; for example, extra cartridge condition.

vOperation:

1.When first enabled in Random mode, the ACF waits for attaching host commands.

2.All magazine cell-status indicator LEDs are set to in-use (steady green). The in-use indicator LEDs remain on unless Random mode is disabled. The priority cell cell-status indicator LED is activated as it is used.

3.All cartridge movement is under control of the attaching host by using the Medium Mover commands.

4.The ACF honors the Prevent Allow Media Removal command. It does not allow operator-initiated export of cartridges any time the command has specified Prevent Media Removal.

5.The priority cell has an assigned element address and can be accessed by the accessor under attaching host control. If an operator inserts a cartridge in the priority cell, the ACF notifies the attaching host. The ACF will not access the cartridge in the priority cell unless commanded by the attaching host.

6.If a cartridge that was loaded while in Random mode is unloaded, it may not always be returned to its cell of origin. The attaching host controls the cartridge location. When the cartridge is placed in a magazine cell, it is placed in the import position.

Cell Status Indicator LEDs

This section describes the operation of the cell status indicator LEDs for the ACF and the priority cell. It also describes the conditions that are identified by the indicator LEDs. The indicator LED operations are described under the following headings:

v“Cell Status: Flashing Yellow–Attention indicator LED” on page 65.

v“Cell Status: Steady Yellow–Alert Conditions” on page 66.

643590 Operator Guide

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Image 84
IBM 3590 manual Cell Status Indicator LEDs