1 CALO DCS power supply status CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] Outline  Introduction  Power supply description with hardware over-limit protection settings  ECS power supply control software – DCS partition tree  Alarm message and FSM “ERROR” state generation Conclusion & Planning: Upgrade Wiener OPC server to newest version Improve alarm message production

2 CALO DCS power supply status CALO meeting Anatoli Konoplyannikov [ITEP / LAPP]  Calorimeter DCS partition includes power supplies for low and middle voltages those powering the CW bases, HV control boards and also PS/SPD VFE electronics.  For detector operation in safe and secure mode all power supplies used in the LHCb calorimeter sub-detectors are equipped with hardware over - limit protection circuitry and in addition protection function implemented on ECS software level.  ECS software for power supplies is based on CERN and LHCb Online group framework components (fwWiener_3.2.0, lbLV_3.4.0, lbArchive_3.3). In addition for Agilent PS control a DIM server has been written.  There are three PVSS projects to manage the LV and MV of the CALO sub-detectors.  Rack Control is the DAI partition project for FE crates Wiener Marathon power supply control (common for LHCb experiment and developed by Online group).  CADCSLV is the DCS partition project for the Wiener LV power supplies dedicated for powering the CALO sub-detectors HV, VFE and LED intensity systems.  CADCSMV is the DCS partition project for the Agilent MV (30 – 150 V) power supplies dedicated for CALO sub-detectors HV system.  Status of the calorimeter power supplies in normal operation is shown by a FSM state and into LHCb Alarm Screen panel dedicated for alarm message handling. Introduction

3 Power supply description with hardware over-limit protection settings CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] Ten Agilent power supply units are used for producing middle voltages for calorimeter sub-detectors. 150V, 100V and 30V voltages are used for HV system. Hardware over- current protection limit set to Nominal value + 50%. Photos of the calorimeter Wiener LV power supply dedicated for VFE, HV and LED intensity control 48 low voltage Wiener power supply units are used in calorimeter Hardware over-current protection limit set to Nominal + 50%. Trimmer resistors for limit settings

4 ECS power supply control software – DCS partition tree CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] Screen – short of the top of the CALO DCS tree with standard FSM panels

5 CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] ECS power supply control software – DCS partition tree Screen – short of the CALO DCS tree with standard lbLV component panels for showing the power group and channel status.

6 CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] ECS power supply control software – DCS partition tree Screen – short of the CALO DCS tree with expert panels of the fwWiener component. The panels allow to change the over-current limit and select an action on failure. Limit settings Action Selector

7 Screen- short of the trend plot of the middle voltage Agilent power supply current. ECS power supply control software – DCS partition tree CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] All middle voltage Agilent power supply currents are archived now and a trend plot panel allow to see a current behavior in time. lbArchive component is used for this.

8 Alarm message and FSM “ERROR” state generation CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] General rules of the alarm handling defined in LHCb. / LHCb ECS Error Reporting Guidelines Reference. Prepared by LHCB Online Group / C. Gaspar/Editor / Alarms can have three severities: WARNING, ERROR and FATAL All messages reported in the Alarm Screen imply that an action should be taken by the operator (most of the time by contacting the expert). The meaning of the different severities is as follows: FATAL – Action should be taken immediately otherwise there could be damage to the detector (HV, Gas, Cooling problems for example) ERROR – Action should be taken, but there is no immediate danger WARNING – Action may need to be taken, the problem needs to be followed up (A temperature or Humidity level is starting to raise, for example)

9 CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] All problems should be reported to the operator using one single tool: The Standard PVSS/FW Alarm Screen. Example of the alarm (WARNING) message that produced in case of a 10 % over-current of the Agilent power supply. The alarm message generation is implemented now with using fwExternalAlertHandler LHCb component. But the last Clara’s recommendation to use the standard PVSS procedure for an alarm handling. I’m planning to change this implementation. Alarm message and FSM “ERROR” state generation

10 CALO DCS power supply status CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] Conclusion  All middle voltage Agilent power supply currents are archived now and a trend plot panel allow to see a current behavior in time.  Definition of the calorimeter low and middle voltage power supply operational status for producing alerts and changing FSM state has been chosen. The following power supply operational status will lead for: FATAL severity when power supply goes OFF, due to any reason (hardware or software limits overloaded). Alarm message is sent to the Alarm Screen and FSM state is changed to “ERROR”; ERROR severity when power supply has about 20 % of over- limit parameter (current or terminal voltage). Alarm message is sent to the Alarm Screen, but FSM state is not changed; WARNING severity is not implemented, due to the power supplies do not have temperature and humidity sensors. This warning could be produced by DSS sensors.

11 CALO DCS power supply status CALO meeting Anatoli Konoplyannikov [ITEP / LAPP] Planning: Update Wiener OPC server of the CADCSLV project to a newest version (v ). It is done already by Beat Jost for LHCb INFDAI project and Mathias Dutour from the CERN EN-ICE group promised to help me in case of problem. Improve an alarm message generation using the standard PVSS mechanism for alert generation. Rearrange CALO power supply DCS partition in the aim to simplify the procedure of the HV system initialization (implement correct order of the power supplies switching ON).