User interfaces
This library has two user interfaces.
v Operator Control Panel - on the front panel of the library
v “Web User Interface” on page 22 - accessed by way of a web browser
Operator Control Panel
The Operator Control Panel operates in two basic modes.
v User Interaction mode - This mode is employed when a user is pushing buttons on the Operator
Control Panel.
v System Driven mode - The normal mode of operation. In this mode, the Operator Control Panel
displays status that is associated with the actions that were caused from commands that are issued by
way of the drive's internal (drive to library) serial interface.
When an Operator Control Panel button is pressed and released, the Operator Control Panel
automatically changes to User Interaction mode. User Interaction mode continues until 3 minutes after a
user stops pushing buttons, or the requested accessor action stops - whichever is longer. At which time,
the Operator Control Panel returns to System Driven mode.
If necessary, the Operator Control Panel automatically changes to the System Driven mode. When this
operation occurs, the library must remember the previous function before the display mode changed.
Therefore, the next button that is pressed changes the Operator Control Panel to the User Interaction
mode from the System Driven mode.
In case of the activated user security feature, the User Interaction mode is restricted to Login and
Monitor menu items, until a user logs in with a correct password.
Operator Control Panel philosophy
Operator Control Panel operation must obey some basic rules. These rules of operation constitute a
philosophy.
v Any operational conflict between commands that are received over the host interface or the Web User
Interface and commands that are entered by way of the Operator Control Panel are avoided with a
reservation mechanism on a first-come, first-served basis. Any reservation by the Operator Control
Panel is canceled by an Operator Control Panel logout or a timeout, which cancels the User Interaction
Mode.
v Library firmware does not allow a user to select an impossible request. Those situations include, but
are not limited to:
– Moving a cartridge from any source to a full slot
– Moving a cartridge from an empty slot
– Loading a cartridge from any source to a full drive
– Unloading a cartridge from an empty drive
v Any error that is detected by the library or drive controller and not recoverable through predetermined
firmware algorithms is considered unrecoverable (fatal). An error code is displayed on the Operator
Control Panel display and the error LED illuminates. The error code remains on the Operator Control
Panel until a push button is pressed, which causes the Operator Control Panel to return to the Home
Screen.
v Numeric error codes are only used for unrecoverable errors, otherwise text status messages are
displayed.
© Copyright IBM Corp. 2007, 2018 19
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