ACC ACC

?

Detector

PVSS II PVSS II

Ethernet

Database(s)

OPCclient

DIMclient

14448

High Voltage Low Voltage

User interface

PVSS II

LV

PMDC

on

tro

l ro

om

(A

CR

)[FSM?]

Crate Control

On-detectorelectronics

32

Temp. Monitor

VME(wiener?)

1

15/03/06

Detector

12

156

Crocus(on-detector crates)

UX-C05/06

CR3

CR4-X03

UX-C05/06

SY1527(A1821N)

CAEN OPCserver

EASY 3000

PVSS IIOPC client

E

HV

LV

48V PSCLV (48V)

1

2

6

6

1

CR3

PCI-CAN

Wiener OPCserver

PVSS IIOPC client

C

CR3

PCI-CAN

ELMB OPCserver

PVSS IIOPC client

C

1

ELMB

2

DDL

CR3

SG2

CR5

SG2

Gas system

PLC

Gas

E

Detector

PVSS IIDIP

[GWG]

Gas

GasPVSS

UX-C

CR3

CoolingPlant

PLC

Detector Cooling

E

Detector

PVSS IIModbus/TCP

1

[TS/CV]

TS/CVSCADA

PMDDCS

SMI Control Unit

SMI Device Unit

VETOPRE

HVPSUM24 48

UM 0 23

LVPS

2.5 -2.5HV

3.3

Detector oriented hierarchy

CrateCtrl

Temp

Hardware Device

Infra

Present Standard State diagram for the DCS

Due to the increasing number of integrated sub-systems in the ALICE DCS, in order to allow a complete integration the present sub-detector DCS state diagram may change.

GO_STANDBYCONFIGURE (run_mode)CALIBRATE (calib_mode) GO_BEAM_TUNGO_READY

MOVING_BEAM_TUN

MOVING_STBY_CONF

MOVING_READY

MOVING_BEAM_TUN

CONFIGURE (run_mode)CALIBRATE (calib_mode)GO_STBY_CONFGO_READY

GO_STBY_CONFGO_BEAM_TUNCALIBRATE (calib_mode)CONFIGURE (run_mode)LOCK

OFF

DOWNLOADING

GO_OFFCONFIGURE (run_mode)GO_STANDBY

CALIBRATING

CALIBRATING

READY

DOWNLOADING

READY_LOCKED

UNLOCK

STBY_CONFIGURED

STANDBY

BEAM_TUNING

CALIBRATINGDOWNLOADING

STOP

STOP

STOP

Need Of LVDB

• Without LV Distribution, if the LV trips all 6 chains on the module consisting 4608 cells will be off.

• LV segmentation will help in isolating the faulty chains by tripping LV supply for the particular chain if fault persists.Also fault can be monitored remotely and can be use for data analysis.

• Prevents FEE boards from going bad due to excess current drawn by the chips due to HV sparks.

General description of LVDB

• LVDB helps us in actively distributing the LV-supply among the FEE board chains (12 FEE Boards per chain).

• It also controls the over-current in a chain which may be caused by HV spikes or board going bad. Current limit can be adjust for the different no of FEE boards in a chain.

• One board can supply 6 chains and also through DCS, chains can be monitored and we can have off time of chain in database.

Low Voltage Distribution Box (LVDB)

To translator Supply

Current adjustment pot

Sensing points to DCS

Power I\P from LV Supply

Remaining work

• LV no work done till now

• FSM’s need to be finalized

• Configuration dB

• Testing and finalization of LVDB

• Use of ALICE GUI