LAr DCS

HW On-Call Training

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LAr DCS system overview

14 PVSS (main DCS tool for ATLAS) projects are running on the 14 PC

Lar DCS control and monitoring systems : ROD system – Wiener VME crates; FEC system Low Voltage and Temperatures HV system ( 8 projects)

Lar DCS monitoring systems : LAr temperature readout LAr purity

LAr Sub-detector Control Station (SCS) – integration of the LAr DCS subsystems using FSM tool + LAr FE Cooling monitoring

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8 CA

NBu

s

ELMB x 58

FEC LV &TEMP

LV PS STATUS

A D

280 V PS

HV7HV3

PCATLLARSCS

FEC TERMO PUR ROD HECLVTEMP

Local Control Stations Station Names : PCATLLAR…

HV0HV1

4 CA

NBU

S

3 CA

N B

us

ELMB x27

48 MB

PURITY CRATE

12 PURITY BOARDS

17 Wiener CRATES

3 CA

NBU

S

270 V PS

HEC LV BOX x8

ELMB

ECA : 36 ECC : 378

CAN

BUS

ISEG

HV MODULES

(151 modules in 5 racks)

4 CA

BUS

UX 15

ATLAS

GCS

USA 15

CAN PSU x16

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LAr DCS system integration

The LAR DCS ( as well as ATLAS) is represented by means of a finite state machine (FSM) hierarchy which is operated by a DCS operator through an FSM and alarm screen.

In ATLAS the DCS is organized in three functional horizontal layers and the FSM is the main tool for the implementation of the full control hierarchy

The LAR sub-detector controls station is top of the LAR FSM tree.

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ATLAS FSM Architecture

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LAr FSM hierarchy

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LAr main FSM panel

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Ui Panel Layout

HV φ – wedges EMB

HV φ – wedges EMB PS

Cooling loops

FE crates ROD crates

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LAR partition Ui panel

Φ – granularity ; All graphic objects are “connected”

to the FSM objects (color of the cycles or wedges color is changing if STATUS or STATE of the FSM object is changing) ;

Text is displayed if the cursor points to a graphic object

There is a possibility to reach corresponding FSM object from the Ui panel

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ATLAS FSM The “STATE” and “STATUS” are defund for each FSM

node. They are two aspects that work in parallel and provide all the necessary information about the behavior of any system at any level in the hierarchy.

The STATE defines the “operational mode of the system” The STATUS gives more details about “how well the

system is working” (i.e. it warns about the presence of errors). The STATUS is somehow similar to the alert screen. Having the display of the STATUS within the FSM is useful to find out faster the information located in the PVSS panel of the element with an error

https://edms.cern.ch/file/685114//FSM_INTEGRATION_GUIDELINE.pdf

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LAr Alarm screen

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Alarm handling

Alarms from the PVSS alert configurations at the data point level will be displayed using the framework (FW) Alarm Screen, and are intended to be used for detailed problem tracking and acknowledgement.

A simplified alarm handling mechanism is introduced at the level of the FSM (“STATUS”). The STATUS allows for context based signalization of problems and error tracking inside the control hierarchy directly on the FSM operator interface.

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Access to the LAR DCS system

System monitoring could be done using of the LAR FSM Ui panels, from ATN – directly , from GPN – WTS (cerntsatldcs)

Limited number of the DCS actions could be done from the FSM panels

Any action should be approved by LAr Run Coordinator !!! E-log entry should be send before start and after finish !!!

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Access control

ALL users which have P1 role – DSC:LAR:admin,expert,observer and DSC:LARHV:admin,expert,observer can login on the WTS

ACR handshake mechanism is activated on the WTS shell, in order to login on the FSM or (and) local DCS PC access should be confirmed either Shift Leader or LAr Run Coordinator

If You have any DCS:LAR(xxx):expert role You can login on the FSM, for example DCS:LARHECLV:expert

If You have P1 - DSC:LAR:admin,expert You can login on the local DCS PC ( HECLV, SCS, FEC, TERMO, ROD, PURITY )

If You have P1 - DSC:LARHV:admin,expert You can login on the local LAr HV PC

P1 roles for HW ONCALL experts : DCS:LAR:observer,DDCS:LAR:expert,CS:LARHV:expert

LAr DCS sub-sytems

and last problem (alarms)

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ROD crate monitoring and control

HW 17 Wiener VME crates ( 7 racks in USA15 L2) + 4 TTC crates in USA15 L1 4 CANBUS lines to PC ( with one Kvaser Card) installed in ROD rack 10-18

(USA15) Dedicated cooling station

10-16

EMB-A-3

EMB-A-4

PM-EMB-A

11-16

EMB-A-1

EMB-A-2

12-16

PM-EMB-C

EMB-C-3

EMB-C-4

13-16

EMB-C-1

EMB-C-2

PM-EMEC-C

PM-EMEC-A

14-16

EMEC-A-1

EMEC-A-2

EMEC-A-3

15-16

EMEC-C-1

EMEC-C-2

EMEC-C-3

16-16

FCAL

HEC

PM-FCAL

PM-HEC

17-16

INJ

COOLINGSTATION

18-16

LARDCSRACK

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ROD crate monitoring and control

Points to attention :Wiener PS temperatureSBC resetexchange of Wiener PS

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FEC Low Voltage and Temperature

HW 58x the same system (32 for Barrel and 26

for EC)

280 V Power Supply in USA 15

LV Power Supply in Tile finger region

ELMB monitors FEC voltages, water temperature, LV Power supply

12 CANBUS lines to PC (with 4 Kvaser cards) installed in LAr DCS rack, 2 CAN lines from each cryostat face to warrant the readout and 4 lines in USA 15 (for 280 PS)

5 CAN Power Supply units (LAr DCS rack in USA15)

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FEC Low Voltage and Temperature

SW PVSS project “ ATLLARFEC ”, sys. # 55 , sys. Name = “ATLLARFEC” JCOP Framework – ELMB, CAN PSU (only) OPC CANopen server DDC

STATUS

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FEC Low Voltage and Temperature

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LAr Purity HW

30 devises inside of the cryostats 12 analog boards in the front-end crates of the cryostats 3U crate is housed in the DCS rack (6 boards) After digitization and histograming the results are transferred via a

CANBUS to a PC.

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LAr Purity

SW Readout with Labview PVSS project “ATLLARPUR”, sys. # 53 , sys. name = “ATLLARPUR” running on

the same PC OPC server for communication Labview and PVSS

Point to attention : Purity spikes

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FCAL current

Purity Barrel C3

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HEC LV system HW

270 V power supply in USA 15 4 HEC Low Voltage Power boxes per EC in Tile finger Region, 8 in total 9 ELMB/per box ( 8 ELMB will be used for the control and measurement of the low

voltage regulators and one to monitor and control power box) 9 CANBUS lines ( 1 line/box + 1 for 270 PS) Serial control lines for redundancy

SW PVSS project “ ATLLARHECLV ”, sys. # 52 , sys.name = “ATLLARHECLV” OPC server