Detector Control System of Tile Calorimeter
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Transcript of Detector Control System of Tile Calorimeter
Giorgi Arabidze (UoA)Tile Cal DCS team
Detector Control System of Tile Calorimeter
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Giorgi Arabidze UoA
Outline:
Introduction Control of Low Voltage Power Supply
system The High Voltage control Infrastructure related systems Connection with external systems Usage of Conditions and Configuration DB Available tools
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Introduction
For DCS implementation commercial SCADA software is used – PVSS II
DCS includes following main, infrastructure and calibration systems
The main systems The Low Voltage Power Supply system The High Voltage distribution system
Detector calibration systems The Cs calibration system The Laser calibration system
Infrastructure related systems Detector water cooling system and rack monitoring
Detector Safety System (DSS)
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Hierarchy of Tile Cal DCS
• Five Control Stations are used for implementation of BE system of DCS• 1x Sub-detector Control Station (SCS)
• Allows complete operation of sub-detector• Communication with DAQ, DSS, Calibration and infrastructure systems • Handles Bulk Power Supplies – 200 and 830/900 V
• 4x Local Control Station (LCS)• Handles LVPS and HV systems • VME crate control
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The DCS for LVPS system (I)
The LVPS system is composed by three devices: 200V bulk PS – provides input voltages to fLVPS devices fLVPS – DC-DC convertor device, provides input voltages for FE
electronics AUX boards – Control device for fLVPS devices
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The DCS for LVPS system (II)
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Used communication protocols: CAN Open – fLVPS and AUX board devices Mod Bus – 200V Bulk PS
Monitoring of system parameters with 10 sec frequency Acquiring 4346 parameters per partition
Two levels of message conversion for ELMB based readout: Raw to physical units, i.e. voltages, currents and temperatures Using calibration constants to adjust output and sense line voltages
The DCS for LVPS system (III)
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The Low Voltage switch ON procedure1. Switch ON 200V PS channels 2. Load calibration constants from Configuration DB3. Set output voltages to minimum and allow output voltages to FE
electronics 4. Rump-up voltages to nominal after 40 sec of stabilization time
The DCS for HV distributor system (I)
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8 Based on HV Bulk PS – 830/900 V
Provides common voltage for each set of PMTs (48 PMTs ) The HV regulator system – HV OPTO
Provides fine adjustment of the voltage for each PMT Voltages are controlled by the controller HV_MICRO
Communication protocols: Serial RS-422 with HV Bulk PS CAN Open with HV_MICRO controller
The DCS for HV distributor system (II)
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The PMT voltages are monitored with frequency of 10 sec Monitoring 4352 parameters per partition The C++ application is used for communication
The PMT states are defined by the internal firmware of HV_MICRO controller
Connection with external systems
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Connection to DAQ and Calibration systems established through SCS Using DIM/DNS interface Provides possibility to implement command/data exchange
Communication with DAQ system DCS publishes state of each Tile Cal module to DAQ system Information about DAQ activities (run type and number) available in DCS
Calibration systems Cs calibration system has possibility to retrieve/apply PMT voltages Parameters of Laser system are displayed on panels of DCS
Tile Cal Finite State Machine (FSM)
FSM – top level software for detector operationTo be used by shifters – common interface for all sub-detector
FSM granularity• CU – CAN/Mod Bus/serial branch • LU – Tile Cal module• DU – Channels of individual device units
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• Implemented commands on CU level• GOTO_READY – Switches ON all device units below• GOTO_STANDBY – Switches ON only LV supply part of sub-detector• GOTO_NOT_READY – Switches OFF all DUs below• RECOVER – Used after power cuts on Tile UPS
Tile Cal Finite State Machine (FSM)
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Usage of Configuration and Conditions DB
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Configuration DB – store data related with detector configuration Calibration constants for individual output and sense line voltages Nominal output voltages
Condition DB – store detector relevant information for understanding detector behavior Voltages, currents and temperatures Using smoothing to reduce amount of data