82 Keysight E8402A, E8404A C-Size Mainframes User and Service GuideProgramming the Enhanced Monitor HISTory SubsystemHISTory:QUEue[:FETCh]? <event index>HISTory:QUEue[:FETCh]? returns a history event from the historyqueue corresponding to . The queue is in chronological order, withthe oldest event in the index as <event index> number 1.ParametersReturned DataComments– Many types of events are logged: amount of time on; wake-up test failures;temperature, current, power, voltage, fan warning events and conditions;calibration occurrences and results; test occurrences and results; and allhistory reset events. The event strings return in the language selected onthe display.Name Type Range Default Description<event index> uint16 1 through the value returnedfrom HIST:QUEue:COUNtnone The index of the historyevent requested.Type Range Default Description<event type> int16 0 to 127 none An number associated with thelogged event.<time stamp> uint32 0 to 4294967295 none Amount of time sincemanufacture that the eventoccurred. Units are set withHIST:UNIT<event string> string Event string associated with thelogged event.EventNumberDescription0 Mainframe powered off.1 History queue was reset/cleared3 Unexpected power-down occurred. Data was lost.4 Power-on test failure. Result given in the event string. Refer to next comment.5 - 17 Front slot temperature over limit. Event Number 5 is slot 0; 17 is slot 12. Limit isgiven in the event string.18 - 30 Middle slot temperature was over the limit. Event Number 18 is slot 0; 30 is slot12. Limit is given in the event string.
