Chapter 2. User InterfacesThis library has two user interfaces.v Operator Control Panel - located on the front panel of the libraryv “Web User Interface” on page 2-4 - accessed via a web browserOperator Control PanelThe Operator Control Panel operates in two basic modes.v User Interaction mode - This mode is employed when a user is pushing buttonson the Operator Control Panel.v System Driven mode - This is the normal mode of operation. In this mode, theOperator Control Panel displays status associated with the actions that werecaused from commands issued via the drive's internal (drive to library) serialinterface.When an Operator Control Panel button is pressed and released, the OperatorControl Panel automatically transitions to User Interaction mode. User Interactionmode will continue until 3 minutes after a user stops pushing buttons, or therequested accessor action stops - whichever is longer. At which time, the OperatorControl Panel will return to System Driven mode.If necessary, the Operator Control Panel automatically transitions to the SystemDriven mode. When this occurs, the library must remember the previous functionbefore the display mode changed. Therefore the next button pressed onlytransitions the Operator Control Panel to the User Interaction mode from theSystem Driven mode.In case of the activated user security feature, the User Interaction mode isrestricted to Login and Monitor menu items, until a user logs in with a correctpassword.Operator Control Panel PhilosophyOperator Control Panel operation must obey some basic rules. These rules ofoperation constitute a philosophy.v Any operational conflict between commands received over the host interface orthe Web User Interface and those entered via the Operator Control Panel will beavoided with a reservation mechanism on a first-come, first-served basis. Anyreservation by the Operator Control Panel is canceled by an Operator ControlPanel logout or a timeout, which cancels the User Interaction Mode.v Library firmware will not allow a user to select an impossible request. Thosesituations will 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 drivev Any error detected by the library or drive controller and not recoverable throughpredetermined firmware algorithms will be considered as fatal. An error codewill be displayed on the Operator Control Panel display and the error LED will2-1
