Date post: | 20-Jan-2018 |
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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.