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Development of a PVSS-Controlled Distributed Control System for ECAL Prototype

This document details the proposed layout and implementation status of the Distributed Control System (DCS) for the ECAL prototype, led by Günther Dissertori at ETH Zurich. The DCS is divided into four sections corresponding to the sub-detectors: EBL, EBR, EEA, and EEB and consists of seven subsystems including high voltage (HV), low voltage (LV), cooling, precision temperature, humidity, laser monitoring, and TSS. The report summarizes communication strategies with the Data Acquisition System (DAQ) and highlights the ongoing development and testing of various subsystems.

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Development of a PVSS-Controlled Distributed Control System for ECAL Prototype

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  1. ECALPrototype DCS system using PVSS Günther Dissertori (for Alison Lister) ETHZ 8.7.2003

  2. Contents: • Proposed layout of the DCS • SM0 and SM1 layouts • Status of implemented sub-systems • Conclusions 8.7.2003

  3. Proposed layout

  4. Proposed layout • Separate into 4 sections of sub-detector: EBL,EBR, EEA,EEB • Each section has same structure • 7 sub-systems: HV, LV, Cooling, Precision Temp, Humidity, Laser Monitoring, TSS • Communication to DSS, DAQ and CMS central DCS

  5. SM0 and SM1 layouts ?

  6. Status of implemented sub-systems • DSS monitors the PLCs of the TSS • Internal structure reflecting that of the figure • All testbeam data sent to Oracle devdb. Easy to retrieve data to text files • Only systems not implemented: Laser monitoring and LV

  7. Supervisory System: • Based on FwFSM, Finite State Machine, sends commands, receives states • As a separate PVSS system • Will communicate with all other systems • Implemented into the Hierarchy (FSM) so far for Cooling and HV systems. Others to follow....

  8. Supervisory System:

  9. Status of implemented sub-systems Cooling system: • Ready for testing • Only sends states, does not receive commands, passive monitoring. • Calibration coefficients and limits can be changed from PVSS with a password.

  10. Cooling system main panel:

  11. Status of implemented sub-systems HV: • installed on final PC, long term stability tests started • Need a password to change any settings and turn on/off channels. Precision Temp: • development started: SM0 will have 2 parallel systems: 1 using ELMB, other using Keithley

  12. HV main panel:

  13. Precision Temp main panel: PROTOTYPE ONLY: for the Keithley system!

  14. Status of implemented sub-systems Humidity: • System similar to the Precision Temp, to be implemented TSS: • Implemented by the Belgrade group • Being tested at the moment

  15. Status of implemented sub-systems Communication with DAQ: • Done via an XML file read by a C++ proxy. Communication to PVSS via DIM. (note: not the final system, only for SM0, until the XDAQ system implemented)

  16. Status of implemented sub-systems • LV communication to be defined before a PVSS development can start • Possibility of web-enabling the Oracle database to allow everyone access to the data in the tables

  17. Conclusions • Close to achieve a nearly “complete” PVSS-controlled DCS for SM0 and SM1 • Aim for a complete control by the fwFSM system • SM0 first large scale test for ECAL-DCS • SM0/1 systems as “prototype” for complete ECAL • The feedback from the shifters during the first weeks of SM0 will be very important

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