Giorgi Arabidze (UoA)Tile Cal DCS team

Detector Control System of Tile Calorimeter

04/20/23

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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

04/20/23

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Giorgi Arabidze UoA

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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Giorgi Arabidze UoA

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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Giorgi Arabidze UoA

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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Giorgi Arabidze UoA

The DCS for LVPS system (II)

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Giorgi Arabidze UoA

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)

04/20/23Giorgi Arabidze UoA

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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)

04/20/23Giorgi Arabidze UoA

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)

04/20/23Giorgi Arabidze UoA

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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

04/20/23Giorgi Arabidze UoA

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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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Giorgi Arabidze UoA

• 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)

04/20/23Giorgi Arabidze UoA

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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