1. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari Progress report on the HMPID LV System Cabling and LV sectorsCabling and LV sectors The WIENER PS Low Voltage SolutionThe WIENER PS Low Voltage Solution System Improvements with the New A1676W R3.04 FirmwareSystem Improvements with the New A1676W R3.04 Firmware Preliminary Test resultsPreliminary Test results ConclusionsConclusions

2. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari Cabling and LV sectors

3. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari Cabling and LV sectors LV Sensing wires Sensor cables

4. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari The LV System Setup with the WIENER PL500 F8 Weiner PL500 Control Firmware CAEN A1676W CAEN A1676W Control Firmware CAEN SY1527 CAEN SY1527 Control Software (Linux OS based) CAEN Wrapper Lib CAEN Wrapper Lib CAEN OPC Server ETM OPC Client Software ETM PVSSII GUI and Control Software

5. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari Main goals of the PL500 F8 remote control Weiner PL500 Control Firmware CAEN A1676W CAEN A1676W Control Firmware CAEN SY1527 CAEN SY1527 Control Software (Linux OS based) CAEN Wrapper Lib CAEN Wrapper Lib CAEN OPC Server ETM OPC Client Software ETM PVSSII GUI and Control Software Best solution Slow response time (2 sec) Low reliability (Already implemented) Slow response time (2 sec) Low reliability (Already implemented) Our solution Requirements of the remote control system: complete, fast and reliable. Complete: each LV channel has to be equipped with an exhaustive set of controlled parameters, including the power On/Off, the single channel Trip Off and the channel grouping for bipolar electronics that are missed in the present Wiener PS version. Fast: the remote control response time in case of OVV, OVC,… should be as fast as possible to prevent electronics' damaging. Reliable: the system safety has to be anyway ensured in case of: missing Ethernet and/or Can Bus connection, SY 1527 Power cut off and/or control software (PVSS) crash.

6. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari A1676W Can Bus Branch Controller A1676W Interface Board A1676W Wiener PS Controller characteristics: The Model A1676W is a board, designed for the SY1527/2527/3527 System family, which allows to control up to 8 W-IE-NE-R Mod. PL500 power supplies via CANBUS. The board is single-width. The A1676W can handle 64 PS channels, since each PL500 can house up to 8 channels. All the channels are seen as Caen channels. The board allows to control the PS channels through a complete set of programmable parameters, such as output voltage, current limits, etc. A1676W Wiener PS Controller characteristics: The Model A1676W is a board, designed for the SY1527/2527/3527 System family, which allows to control up to 8 W-IE-NE-R Mod. PL500 power supplies via CANBUS. The board is single-width. The A1676W can handle 64 PS channels, since each PL500 can house up to 8 channels. All the channels are seen as Caen channels. The board allows to control the PS channels through a complete set of programmable parameters, such as output voltage, current limits, etc.

7. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari The improved features of the PL500F8 via the New A1676W R3.04 Firmware New Channel Features: Single Channel ON/OFF (CH PW) Single Channel TRIPOFF (CH TRIPOFF) Channel Grouping New PL500 feature: Enable/disable the Bipolar Grouping Mode (CR GRP). New Channel Features: Single Channel ON/OFF (CH PW) Single Channel TRIPOFF (CH TRIPOFF) Channel Grouping New PL500 feature: Enable/disable the Bipolar Grouping Mode (CR GRP).

8. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari Telnet Window New A1676W R3.04 Firmware

9. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari Measure of the Channel Tripoff Response Time (T R ) A CH TRIPOFF has been induced (OVC on Ch#1), we measured the switch OFF time of the single channel (reaction time). CAEN SY 1527A1676WWIENER PL500 F8 Power Supply Can Bus (speed 1 Mbps) LECROY 9310AM Telnet connection Channel 1 probe 2 Can Bus probe 1

10. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari Statistical analysis of T R 1 crate8 crates 64 [ms]130 [ms] T R Max140 [ms]240 [ms] A1676W FW R. 3.04: 1 crate8 crates Status110 [ms]210 [ms] V mon, I mon 500 [ms]1470 [ms] PSOT, Temp. 48500 [ms]123495 [ms]

11. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari Measure of the Crate Tripoff Response Time When the crate TRIPOFF option is enabled, on the over-current occurrence, about 5 ms are requested to switch OFF the entire power box. WIENER PL500 F8 Power Supply LECROY 9310AM Channel 1 probe 1

12. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari In case of CANbus controller power cut (SY1527 power cut), an Interlock signal switches Off the connected PS’s. Recovering of the settings after a power cut is guaranteed since all the values are written in the E 2 PROM of the A1676A. In case of CANbus controller power cut (SY1527 power cut), an Interlock signal switches Off the connected PS’s. Recovering of the settings after a power cut is guaranteed since all the values are written in the E 2 PROM of the A1676A. System reliability CAEN SY 1527 WIENER PL500 F8 POWER SUPPLY A 1676W In case of CANbus disconnection, the occurrence of an over current can be limited by setting each channel Current Limit’ equal to the OVC. Is now under study the activation (via PVSS) of the the Interlock line to switch Off in a selective way the “unplugged” PS. Can Bus If the Ethernet connection is missed, the system still remains in its full operation. Interlock Ethernet Connection Interlock

13. HV-LV DCS Workshop – 16/03/2004 G. De Cataldo, A. Franco, A.Tauro - INFN Bari Conclusions The PL500F8 technical specifications fits the LV sector requirements but the control features. The prototype of the new project CAEN –WIENER (A1676W), with single channel ON⁄OFF, grouping,…, is now running! The test results on the reaction time, are in agreement with the expectations and are very encouraging!! The PVSS HMPID LV Control has been updated taking into account the new PS features