S.Sergeev (JINR)

Tracker consists of4 stations of

4 views (planes) eachIn total ~7200 drift tubes (~450 per view)

To be controlled/monitored HV system LV system Gas system Thermo-sensors

Only “CERN Standard” solutionsPVSS II + JCOP framework as a basement for DCS

development

PVSS II is a SCADA toolkit for high level control system development

Visual programming (active pictures) Object-oriented (data point)

encapsulation inheritance member fields

Event-driven Events related to a change of a data point element (member

field) value Interpretive system

Language – some mixture of C, C++ and Pascal Distributed system

Straw tracker needs 4 HV (2 HV?) channels per view => 64 HV channels (32 channels)

Possible HV power supplies CAEN HV modules

A1832 – 12 channels, 6KV, 1 mA or A1535 – 24 channels, 3.5 KV, 1 mA

CAEN mainframe SY2527LC (up to 6 modules)

If Mainframe SY1527LC is used => could be shared with other sub-detectors

Windows PC OPC server PVSS II Windows or

Linux PC

Could be single PC

TCP/IPCOM/DCOM

(TCP/IP)

OPC clien

t

Ethernet

Should be used Wiener power supply Current per plain (view) ~3A Wiener MPV 4008L could be used

4 channel per module => one unit per station

0V ... 8V5A40W per channel12bit control DAC, ADC<10mVppCommunication by TCP/IP, USB, CAN-bus

Windows PC OPC server PVSS II Windows or

Linux PC

Could be single PC

COM/DCOM

(TCP/IP)

OPC clien

t

Ethernet

Terminator

CAN-BusInterface(Quasar XXXX)

CAN-Bus

JCOP framework + CERN Gas working group

CERN Standard 2-component gas mixer For safety (working in vacuum)

Up to 32 gas segments per view (???)Two electric valves per plane (station???)

with 2 flow meters to cut the gas in case of broken straw + manual valves to cut off the segment with the broken straw

Open questions

View (plane), 60 measurements in total, 0.5C 1 temperature measurement per cover on the

bottom of the PCB (to measure gas and board temp)   1 voltage measurement per cover   4 temperature measurements for mechanics.

There are 28 covers/view

Station 4 views 240 measurements/station (112 volt, 128 temp) 6 ELMBs

Detector 4 stations 24 ELMBs total

Windows PC OPC server PVSS II Windows or

Linux PCOPC clien

t

Ethernet

4 stations

CAN-BusInterface(Quasar XXXX)

CAN-Bus

6 ELMBs per station,24 ELMBs in total,

4 CAN-bus branches

Wiring is not clear,8 ELMBs per station?

Any detector DCS has three trees Hardware tree in terms rack-crate-board-

channel. Used for geographical addressing of infrastructure units

Logical tree in terms detector-subdetector-station-plane-channel-parameter. Used for navigation in the detector view

FSM tree. Used to propagate commands from top layer to bottom layer and states from the bottom to the top. Usually it is similar to the Logical tree

NA62 Root

TrackerStation1

View XLV

HV1

HV4Cover1

Cover28Temp.

Voltage

LVVoltageCurrentTemp.

HVVoltageCurrentTemp.

RampingTrip TO

Proposed states of the Straw tracker DOWN, color – BLACK. All power supplies are OFF

Available command – STANDBY OFF, color – BLACK. Some power supplies are on.

Available commands – STANDBY, DOWN STANDBY, color – BLUE. All LV power supplies are ON, all HV

power supplies are OFFAvailable commands – ON, DOWN

NOT_READY, color BLUE. ALL LV power supplies are ON, some HV power supplies are ON.Available commands – ON, DOWN

ON, color GREEN. ALL power supplies are ON.Available commands – STANDBY, DOWN

Error, color RED. Some power supplies are in TRIP state, overheating etc.Available commands – ON, STANDBY, DOWN, RESET(?)

It seems reasonable at the beginning of the work to use individual Windows PC for Tracker DCS running PVSS system (UI manager, DB manager, Event manager, Distribution manager) and all OPC servers. This PC should provide access to all tracker GUIs.

After the development is finished it seems to be reasonable to port Tracker DCS to common DCS PC (both PVSS panels and servers. To be confirmed)

To avoid crowds at a single Central DCS PC screen we plan to run tracker GUIs (PVSS UI manager) at the tracker PCs leaving the PVSS system at the central DCS PC.

To allow simple maintenance the tracker panels, functions etc. should be converted to the JCOP framework component.