21/6/2004 Colmar, DCS Work. G. De Cataldo Cern-CH&INFN Ba,I; A. Franco INFN BA,I 1 The candidate STANDARD diagram for the HV FSM in ALICE TO WHAT AND WHY IT APPLIES FOR THE CANDIDATE HV STANDARD DIAGRAM THE TIME SCHEDULE

21/6/2004 Colmar, ALICE week G. De Cataldo Cern-CH&INFN Ba,I; A. Franco INFN BA,I 2 Det-Mod-1 Detector DCS GasLV-1/ FEE-1HV-1 SMI Control Unit SMI Device Unit Ch 1 Nth_trip Soft-interlock Auxiliary communication channel: under definition HVMod 1 HVPS1 HV CRATE LV P Supplies FEE LVPS14FEEMod 1 LVPS1 HV LV/FEE Detector DCS Ch 1 Nth_trip Soft-interlock a) b) TO WHAT AND WHY IT APPLIES FOR The standard diagram applies for a detector part where some HV channels are connected ; It aims to reduce the HV ramping-up time; The HV control program has to provide intersystem software interlocks:HV-LV-, majority condition on the tripped channels for the error recovering; enabling/disabling channel configuration;…….. The standard diagram applies for a detector part where some HV channels are connected ; It aims to reduce the HV ramping-up time; The HV control program has to provide intersystem software interlocks:HV-LV-, majority condition on the tripped channels for the error recovering; enabling/disabling channel configuration;……..

21/6/2004 Colmar, DCS Work. G. De Cataldo Cern-CH&INFN Ba,I; A. Franco INFN BA,I 3 CONFIGURING ON Go_CONFIGURED RESET ERROR Severe Alarm conditions crate fan tray failure un-calib. Board external interlock…... RESET Go_INTERMETIATE Go_OFF Go_ON RESET OFF CONFIGURED_OFF INTERMEDIATE The candidate HV STANDARD diagram Acknowledged #trips < max/Δt RAMP_DOWN_HIGHRAMP_DOWN_FULLRAMP_DOWN_LOWRAMP_UP_HIGHRAMP_UP_LOWRAMP_UP_FULL Go_CONFIGURED_OFF Go_ON RESET Go_INTERMEDIATE Go_CONFIGURED_OFF RESET REPAIR Max/ Δt #trips ≥ max/Δt If #trips < max/Δt Wait time over for automatic recovering OFF BOOTING Go_OFF Reset (Kill) PWS_ON ON Power supply state diagram Alarm severities and ERROR recovering within the FSM Severe Alarm - - ERROR Warning Man. REPAIR Warning Auto REPAIR

21/6/2004 Colmar, DCS Work. G. De Cataldo Cern-CH&INFN Ba,I; A. Franco INFN BA,I Alarm Handling from the JOCOP FW sub-project guidelines and convention document Following the guidelines of the AWG the intention of an alarm is to bring an anomaly situation to the attention of an operator and as such alarms are considered to be messages which are displayed to the operator via the alarm display and that are logged. An alarm does not initiate an action. Should an action be required then this should be handled within the FSM. An alarm has several properties: · Its Origin, which is used to identify the source of an alarm. · Whether or not the alarm requires acknowledgement. · Its Severity Level, which is used to characterise the seriousness of the alarm. · Its Dependencies on other alarms. · Certain Additional Details about the alarm.

21/6/2004 Colmar, DCS Work. G. De Cataldo Cern-CH&INFN Ba,I; A. Franco INFN BA,I 5 Alarm sources ALARM NOTIFICATION in PVSS System RECOVERING within FSM Alarm notification in PVSS and system recovering within FSM

21/6/2004 Colmar, DCS Work. G. De Cataldo Cern-CH&INFN Ba,I; A. Franco INFN BA,I 6 Time schedule as Conclusions Dec. 2004Jan.05Mars.05 HV Standard LV Standard DCS Standard June 04July 04August 04Sept. 04Oct. 04 Definition of the Standard Diagrams HV-LV FSM Starting of implementation DCS ready