G.de cataldo-A. Franco INFN bari Investigated solutions and market survey for the HV-LV sub-systems

g.de cataldo-A. Franco INFN bari

Investigated solutions Investigated solutions and and

market survey for the market survey for the HV-LV sub-systemsHV-LV sub-systems

Investigated solutions Investigated solutions and and

market survey for the market survey for the HV-LV sub-systemsHV-LV sub-systems


LV-HV Sub-systemsCAEN solution: Resulting detector segmentation

Power requirements/segment

V A W FEE+ +2.8 4.8 (3.2) 13.5 (9.0)FEE- -2.8 5.0 (3.4) 14.0 (9.5)ADC+ +5 2.0 10.0ADC- -5 2.0 10.0MCM +5 3.0 15.0

Power requirements/segment

V A W FEE+ +2.8 4.8 (3.2) 13.5 (9.0)FEE- -2.8 5.0 (3.4) 14.0 (9.5)ADC+ +5 2.0 10.0ADC- -5 2.0 10.0MCM +5 3.0 15.0

12MCM Segments 4 ADC Segment9 FEE Segments, 180 (120) GASSIPLEX

each

9 HV Segments, 36 (24) wires each, this requires a grouping of 12 sense wires

12MCM Segments 4 ADC Segment9 FEE Segments, 180 (120) GASSIPLEX

each

9 HV Segments, 36 (24) wires each, this requires a grouping of 12 sense wires

FEE 1 FEE 2 FEE3

FEE 4 FEE 5 FEE6

FEE 7 FEE 8 FEE9

MCM1 MCM2 MCM3 MCM4 MCM5 MCM6

MCM7 MCM8 MCM9 MCM10 MCM11 MCM12

ADC1 ADC2

ADC3 ADC4

H1 H2 H3 H4 H5 H6 H7 H8 H9

7 x HMPID MODULE

3 x CAEN SY1527 (TCP/IP protocol)

Boards: 9 x A1517 3V-6A (prot. by the end of 6/2001)

11 x A1518 5V-3.6A(.. by the end of6/2001)

6 x A1821A 3kV (Delivered and test under way)

7 x HMPID MODULE

3 x CAEN SY1527 (TCP/IP protocol)

Boards: 9 x A1517 3V-6A (prot. by the end of 6/2001)

11 x A1518 5V-3.6A(.. by the end of6/2001)

6 x A1821A 3kV (Delivered and test under way)


Layout of the CAEN solution

Front view Rear view


Power requirements for each segment

V A W FEE+ +2.8 5.9 17.8FEE- -2.8 6.8. 18.7ADCa+b +5 8.0 40.0ADCa+b -5 8.0 40.0MCM +5 18.0 90.0

Power requirements for each segment

V A W FEE+ +2.8 5.9 17.8FEE- -2.8 6.8. 18.7ADCa+b +5 8.0 40.0ADCa+b -5 8.0 40.0MCM +5 18.0 90.0

2 MCM Segments

1 ADC Segment

6 FEE Segments, 480 GASS. each

6 HV Segments, 48 wires each

LV-HV Sub-systemsWIENER or EUTRON based solution:

assumed detector segmentation

For both these solutions, the HV For both these solutions, the HV PS is still based on the CAEN PS is still based on the CAEN SY1527 SY1527

For both these solutions, the HV For both these solutions, the HV PS is still based on the CAEN PS is still based on the CAEN SY1527 SY1527

MCM1

MCM2

ADC1a

ADC1b

FEE 1 FEE 2 FEE 3 FEE 4 FEE 5 FEE 6

H1 H2 H3 H4 H5 H6


The Master Power Box can operate via

• RS232 up 8 slave crates• CANbus up to 127 crate• TCP/IP offers performance for

larger numbers of channels.

Master power 3U box:Max DC Power/box =2.5 KW

Up to 12 PL600 modules/box One module consist of one floating

ch.2..7V - 25A max 175W

Master power 3U box:Max DC Power/box =2.5 KW

Up to 12 PL600 modules/box One module consist of one floating

ch.2..7V - 25A max 175W

FEE : 42 segments x 2 polarity 84 modules (2.8Vx12.7A=36.5W)MCM : 14 segment 14 modules (+5Vx18A=90W)

ADC : 7 segments x 2 polarity 14 modules ( 5Vx16A=80W)

Layout of the WIENER LV units

Master Power Box

Master Power Box


Layout of EUTRON-PLC devices

EUTRON PS UnitsEUTRON PS Units

PLC SIEMENS S7300PLC SIEMENS S7300

Connecting and sensing Board

Connecting and sensing Board

TO HMPID MODULESTO HMPID MODULES

3 x EUTRON BVD 720S 0..8 v 25 A1 x EUTRON BVD 1500S 0..8 v 50 A

For the EUTRON solution the power switching and sensing of each LV channel are based on a Siemens PLC system (relays and ADC modules) and a custom sensing board. This solution requires a control program developed ad hoc by the user.


First cost estimationFirst cost estimation (cables and connectors not included)(cables and connectors not included)

• CAEN HV-LV

• EUTRON LV + CAEN HV(PLC software development not included)

• WIENER+ CAEN HV

LV HV

€ CHF € CHF

111.350 172.500 23.150 36.000

66.200 102.500 30.100 46.700

56.800 88.000 30.100 46.700


The EUTRON-PLC Control SystemThe EUTRON-PLC Control System

Requirements list;Requirements list;

The control system as a Finite State The control system as a Finite State MachineMachine; (bubble chart); (bubble chart)

Apparatus layout and technical Apparatus layout and technical specifications of the sensing board;specifications of the sensing board;

the PLC readout software.the PLC readout software.

E. Carrone,


The Requirements The Requirements listlist

• FEE LV switching ON: since the FEE requires ±2.8 V then both these polarities must be supplied contemporary,

• FEE LV switching OFF: before a FEE segments is switched OFF, the facing HV segment (see St.Rep3 at http://richpc2.ba.infn.it) must be switched OFF. This sequence is mandatory to prevent FEE breakdowns due to charge accumulation on the MWPC cathode pads. (In fact the ground reference to the MWPC sense wires is ensured trough the FE electronics, then the low voltage at the corresponding FE electronics segment must be applied before the HV segment is switched ON);

• Current and voltage ranges: Vload Iload must be in the admissible range: Vmin < Vload < Vmax, Imin < Iload < Imax. If Iload > Imax then the corresponding HV-LV segments must be automatically switched OFF according to FEE LV switching OFF sequence

• Alarms handling …• …

• FEE LV switching ON: since the FEE requires ±2.8 V then both these polarities must be supplied contemporary,

• FEE LV switching OFF: before a FEE segments is switched OFF, the facing HV segment (see St.Rep3 at http://richpc2.ba.infn.it) must be switched OFF. This sequence is mandatory to prevent FEE breakdowns due to charge accumulation on the MWPC cathode pads. (In fact the ground reference to the MWPC sense wires is ensured trough the FE electronics, then the low voltage at the corresponding FE electronics segment must be applied before the HV segment is switched ON);

• Current and voltage ranges: Vload Iload must be in the admissible range: Vmin < Vload < Vmax, Imin < Iload < Imax. If Iload > Imax then the corresponding HV-LV segments must be automatically switched OFF according to FEE LV switching OFF sequence

• Alarms handling …• …

It is intended to specify all the procedures to operate properly the LV power supply units while connected to the FE electronics. An incomplete example could be:

E. Carrone,


• OFF ( P.S. in Standby, relays OFF and Vout=0)

• Calibration (reading Voutput from units)

• Configuration (FEE segment selection)

• Standby (LV system in STBY status)

• ON (Ready For Physics: P.S. STBY removed, check of Current/Voltage values)

• OFF ( P.S. in Standby, relays OFF and Vout=0)

• Calibration (reading Voutput from units)

• Configuration (FEE segment selection)

• Standby (LV system in STBY status)

• ON (Ready For Physics: P.S. STBY removed, check of Current/Voltage values)

The control system The control system as a Finite State Machine:as a Finite State Machine:

state definitionstate definition

E. Carrone,

Taking into account the requirement list and how to properly operates the EUTRON units, the following “states” have been defined:


LV C.S. representation LV C.S. representation

STATESOFFStopRunningFillingReady

When the ON state is active Iload and Vload are monitored on all the active FEE segments. If one of these values is out of range then the relevant FEE segment is switched OFF and the HV system is contemporary notified to switch OFF the corresponding HV segment.

During the transition ON->STBY the HV status must be checked and if it is HV-ON then the LV C.S. must kill the HV system.

When the ON state is active Iload and Vload are monitored on all the active FEE segments. If one of these values is out of range then the relevant FEE segment is switched OFF and the HV system is contemporary notified to switch OFF the corresponding HV segment.

During the transition ON->STBY the HV status must be checked and if it is HV-ON then the LV C.S. must kill the HV system.

COMMANDSSTARTRUNFILLPURGESTOPMANRESET

COMMANDS

STARTCALIBRATECONFIGURESTOPSUSPENDFEEDRESET

CONF

STBY

ON

CAL

OFF

CALIBRATE

CONFIGURESTART

STOP

SUSPEND FEED

ALARM

AlarmConditionRESET

STATES

OFFCALibrationCONFigurationSTBY StandbyON ReadyALARM

LV: the bubble chart representation

E. Carrone,


Apparatus Layout

Power Supply: EUTRONBVD720S, 0-8V, 0-25 A.

PLC: Siemens S300Analog Inputs 8 x 12 bit.

Power Supply: EUTRONBVD720S, 0-8V, 0-25 A.

PLC: Siemens S300Analog Inputs 8 x 12 bit.

E. Carrone,

Dummy resistive Load

Power Supply

Siemens S300 PLC

Ethernet

NTWorkstation

Vload

sensingline

Power line

CH1/2

Iload sensing line

Set and reading PS Vout

from-toPLC relays

SensingBoard

SensingBoard

In order to split the PS current into several channels, each one connected to one FFE segment, a PLC relays module is used. The Vload-Iload measurement is based on a sensing board read out via 8CH ADC module.


Sensing Board

E. Carrone,

Vs +Vs + Vs -Vs -


The input stage of the ADC accepts the max Common Mode Voltage UCM= 2.5V. This imposes a Vsensing attenuation via a resistive net (UCM= (Vin+Vo)/2 3.9 V) .

The input stage of the ADC accepts the max Common Mode Voltage UCM= 2.5V. This imposes a Vsensing attenuation via a resistive net (UCM= (Vin+Vo)/2 3.9 V) .

Signal Conditioning

E. Carrone,

With the ADC LSB of 22.4 V in the range +-80mV, a current sensitivity

THE NET RESISTORTHE NET RESISTOR

4

43

43

4

43

4

43

4

21

2

sinsin

sin

R

RRVVV

RR

RVVV

RR

RV

RR

R

RR

RVVVV

pedsrgsengsenpedsr

gseninsssr

In order to measure the Vped, Rsens has been put in short circuit (Vsensing=0) and this resulted in Vped=5 mV. To evaluate the Ucm attenuation factor A= R4/(R3+R4), Vsr and Vsensing have been measured and it resulted in A=0.1325:

VVsensingsensing = (V = (Vsr sr - V- Vpedped)/A)/AVVsensingsensing = (V = (Vsr sr - V- Vpedped)/A)/AFinally

IIload load = V= Vsensing sensing / R/ RsenssensIIload load = V= Vsensing sensing / R/ Rsenssens

=LSB/A*Rs= 2.8 mA=LSB/A*Rs= 2.8 mA=LSB/A*Rs= 2.8 mA=LSB/A*Rs= 2.8 mA

on the Iload is achieved. This allows the C.S. to detect the single FEE chip failure which drains 45 mA per polarity.


PLC VAT (Variable Table)

ADC “brute” value

E. Carrone,

PIW 288 “V sensing + ADC” --- DEC 8872PIW 290 “V sensing – ADC” --- DEC -14440PIW 292 “V load + ADC” --- DEC 15496PIW 294 “V load – ADC” --- DEC -15496

MD 100 "I load +“ --- REAL 3.737275MD 108 "I load -“ --- REAL -4.101968

MD 132 "V load +“ --- REAL 2.802372MD 124 "V load -“ --- REAL -2.802372

MD 20 "V sensing + input ADC“ --- REAL25.67129

MD 28 "V sensing - input ADC“ --- REAL-41.7824

[V]

[A]

[mV]

Process Input Word

Memory Double Word


PLC Instruction List NETWORKTITLE =Sensing Current CH +

AN Q 4.1; S Q 4.1; AN Q 4.2; S Q 4.2; AN Q 4.0; S Q 4.0; AN Q 4.3; S Q 4.3; L PIW 288; ITD ; DTR ; L 2.893518e-003; *R ; T “V sensing + input ADC"; L 5.000000e+000; L “V sensing + input ADC"; +R ; T MD 68; L MD 68; L 7.566840e+000; *R ; T MD 84; L MD 84; L 6.210000e+001; /R ; T "I load +";

Relays switches

ADC reading value [mV]

Pedestal offset

1/A where A=attenuation factor

V I Conversion

Integer: 16 bit 32 bit

Integer 32 bit IEEE-FP 32 bit

E. Carrone,


The Configuration Program

A devoted program reads from a file the HV sub-system configuration ( # HMPID modules, HVsegment/module) and creates the DataPoint data base in the PVSS environment.

These data points are automatically created according to the specified variables (Crate/Board/Channel) of the CAEN OPC Server and it sets a link between the OPC variable addresses and the PVSS data base.

Control System for the CAEN SY1527 in the PVSS environment.


Monitoring panel of the HMPID HV System

Alarm condition

Segment disabled

“Burned-out”

Segment

Link to theEnable/DisablePanel

Link to theChannel Configure Panel

Link to the Monitoring Panel of SY1527

Link to the Monitoring Panel of the HV segment


Monitoring panel of the HV Segment (when the CAEN SY1527 OPC serv. Is running!)

Channel Name

Actual value of Parameters

Trend parameter Chart

Channel settings Channel Status HV-ON

Trend display settings


Enabling/disabling HV Segments

Segment Enabled

Segment Disabled

Option for global Enable/Disable

action

Exit


HV Channel configuration

Parameter Name Parameter Value

Cancel all the changes

Save the present configuration

Exit


SY1527 Control panelSY1527 Control panel

System Name

Crate Alarm condition

Crate Front panel status

Power

Fan & Power unit Status

Inserted board status

Board description

Crate commands Crate settings

Empty slot


HMPID DCS: LV prototype panel

Documents

G.de cataldo-A. Franco INFN bari Investigated solutions and market survey for the HV-LV sub-systems