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DCS Workshop
André Augustinus22 June 2004
Status on services controls
22 June 2004DCS Workshop 2André Augustinus
Introduction To operate, detectors will interface to a number of
services such as:• Gas• Cooling and ventilation• Electricity• Magnets• Safety
This presentation tries to summarize the DCS aspects of the interface
Thanks to service groups for their input
22 June 2004DCS Workshop 3André Augustinus
Gas systems
Detector
Detector gas systems
Primary gas
22 June 2004DCS Workshop 4André Augustinus
Gas systems[responsibilities]
Primary gas• Build and maintained by TS/LEA
• Gas Distribution and Supply (GDS) group
Detector gas systems• Build by the Gas Working Group (GWG)
• According to specifications by the detectors
• Controls is collaboration GWG and IT/CO• Maintenance and operation by GWG
• Except very few specific operations
22 June 2004DCS Workshop 5André Augustinus
Gas systems[primary gas]
Primary gas is stored in dewars or batteries at the surface (SG or outside)
Dewars are backed up by batteries Batteries are usually doubled with automatic
switchover Information is available to the gas control system,
and can, from there, be made available to the experiment
22 June 2004DCS Workshop 6André Augustinus
Gas systems[detector gas systems]
A detector gas system consists of several ‘modules’• mixer, pump, distribution, purification, etc.
The control of each gas system will be based on a PLC (one per system)• GWG is responsible for control of each gas system
• Closed loop control, software in PLC• Guarantees autonomous and safe operation
Detector gas systems are maintained and operated by the GWG• according to well defined operational procedures (decided
between GWG and user)
22 June 2004DCS Workshop 7André Augustinus
Gas systems[detector gas systems]
A dedicated supervisory system will provide user interfaces etc. for the local operation (by GWG) of the gas systems• Based on PVSSII• Full control for gas experts and maintenance team
The experiment (detectors) is expected to have only limited interaction with the gas systems
22 June 2004DCS Workshop 8André Augustinus
Gas systems[detector gas systems]
Read access to ‘any parameter’ in the gas control system from the DCS• The detectors to express their needs
No actions (control) are expected ‘Meta commands’ available to the detector and
experiment (to trigger a predefined sequence)• E.g. restart after power cut
Some control might be required for special monitoring equipment• E.g. drift velocity measurement
22 June 2004DCS Workshop 9André Augustinus
Gas systems[detector gas systems]
Exchange of information via software• Mechanism and protocol to be defined
• Common effort for all experiments
• Access through ‘gateway’ (PC), no direct access to PLC’s Interlocks (open/close contact) can be generated
22 June 2004DCS Workshop 10André Augustinus
Gas systems
PLC
PC
Gas System
(local) supervisionand operation byGWG (PVSSII)
Detector
ALICE DCS, global supervision and operation (PVSSII)
High Voltagepower supply
Global commands (restart)Monitoring (status, alarms, data)
Gateway PC
LAN
Interlock
GWG ALICE
22 June 2004DCS Workshop 11André Augustinus
Cooling and Ventilation
Detector
Detector cooling
Primary Cooling
VentilationAir conditioning
22 June 2004DCS Workshop 12André Augustinus
Cooling and Ventilation[responsibilities]
Primary cooling• Full responsibility of TS/CV
Detector cooling• Build and maintained by TS/CV, including controls• ‘Day to day’ operation by the experiment
Ventilation (including air conditioners)• Full responsibility of TS/CV
22 June 2004DCS Workshop 13André Augustinus
Cooling and Ventilation[primary cooling & ventilation]
Both operated and maintained by TS/CV Operated through their control systems (wizcon) No interaction with experiment expected Possibility for experiment to get information on these
systems through ‘DIP’ (Data Interchange Protocol)
22 June 2004DCS Workshop 14André Augustinus
Cooling and Ventilation[detector cooling units]
The control of the cooling units will be based on a PLC (one per cooling unit)
We assume a major part of the controls as an intrinsic part of the cooling units:• TS/CV is responsible for the cooling unit control (closed
loop control, software on the PLC).• This will guarantee autonomous and safe operation
• TS/CV provides a supervisory system for their own use (based on wizcon) during commissioning, test and maintenance.
• This allows full control for cooling experts
22 June 2004DCS Workshop 15André Augustinus
Cooling and Ventilation[detector cooling units]
The baseline assumptions are:• The cooling units will deliver cooling water of a pre-defined
temperature (and defined stability) to the sub-detector• This temperature can be defined by the sub-detector (within given
limits)
• The control system of the cooling unit will take care of the regulation of this temperature
• No external system (e.g. DCS) will be involved in the regulation loop
22 June 2004DCS Workshop 16André Augustinus
Cooling and Ventilation[detector cooling units]
PLC
PC
Cooling Unit
(local) supervision andoperation by TS/CV(WIZCON)
Cooling Circuit 1
Cooling Circuit 2
Water at x°C ± y°C
TS/CV
Detector
22 June 2004DCS Workshop 17André Augustinus
Cooling and Ventilation[detector cooling units]
DCS will be in charge of ‘day-to-day’ operation• The cooling system will operate autonomously,
independent of the status of the DCS
The control will be on a relatively global level (system level), rather than on the device level• Switch on and off a cooling unit
(or switch from one running mode to another)• Switch on/off a single cooling circuit within a cooling unit• Define the water temperature set-point for each cooling
circuit within a cooling unit
22 June 2004DCS Workshop 18André Augustinus
Cooling and Ventilation[detector cooling units]
Any information requested will be available to DCS• parameters, status, alarms• Detectors to express their requirements
Hardwired interlocks can be generated DCS will interface directly to the PLC’s
• Probably modbus TCP/IP
Arbitration mechanism to prevent confusion or worse (operation from DCS and TS/CV)
22 June 2004DCS Workshop 19André Augustinus
Cooling and Ventilation[detector cooling units]
For the majority of the cooling units there will be only very limited (active) interaction with the DCS during normal operation• One could think of a restart command that launches a pre-
defined start-up procedure after a power outage
During normal operation DCS will be mainly monitoring
Small and slow corrections on water temperature are possible for specific needs (e.g. TPC)• Should not disturb primary control loop
22 June 2004DCS Workshop 20André Augustinus
Cooling and Ventilation[detector cooling units]
PLC
PC
Cooling Unit
(local) supervision and operation by TS/CV (WIZCON)
Cooling Circuit 1
Cooling Circuit 2
Water at x°C ± y°C
TS/CV ALICEPC
ALICE DCS, global supervision and operation (PVSSII)
LAN
Low Voltagepower supplyInterlock
Global commands (on/off, setpoint)Monitoring (status, alarms, data)
Detector
Temperaturemonitoring
T1
T2
T3
Recalculatesetpoint
TPC-specific
22 June 2004DCS Workshop 21André Augustinus
Electricity
“Hazemeyer”
Transformer
Is
racks
“Tableau BT”
Prim
ary e
lectricity
EDF / EOS
22 June 2004DCS Workshop 22André Augustinus
Electricity[responsibilities]
Primary electricity• Full responsibility of TS/EL
Distribution of power to the racks• Build and maintained by TS/EL, including controls• ‘Day to day’ operation by the experiment
Control of (power to) equipment inside the racks• Crates and other equipment• Responsibility of DCS
22 June 2004DCS Workshop 23André Augustinus
Electricity[primary electricity]
Completely installed (refurbished), maintained and operated by TS/EL
Controlled and monitored by their own supervision system (ENS), delegated to TCR
Experiments can get information through DIP
22 June 2004DCS Workshop 24André Augustinus
Electricity[distribution to racks]
“Hazemeyercupboard”
“Hazemeyerdrawer” (TDM)
Each rack (UX) or pair of racks (CR) is powered from a ‘drawer’
Electrical protection and control
Under full control of DCS
22 June 2004DCS Workshop 25André Augustinus
Electricity[distribution to racks]
Hazemeyer drawers are controlled and monitored from a PLC (one for CR, one for UX)
Interface to DCS through Rack Control Application• common JCOP activity (driven by CMS)• based on modbus TCP/IP
DCS can switch on/off racks, monitor state• Through rack monitor (ELMB) RCA will also monitor other
parameters from rack: temperatures, turbine status …
22 June 2004DCS Workshop 26André Augustinus
Electricity
PLC
PC
“Hazemeyer”
supervision and operation by TS/EL (ENS)
TS/EL ALICEPC
ALICE DCS, global supervision and operation (PVSSII)
LAN
Commands (on/off)Monitoring (status, alarms, data)
Racks
PLC
No commandsonly monitor!
22 June 2004DCS Workshop 27André Augustinus
Electricity[distribution inside the racks]
TS/EL does not foresee any control inside the rack Lower granularity of power control on the equipment
level• Use facilities of the equipment (Wiener VME)• Use special power outlets• WG is looking at powering PC racks
Make inventory of needs, monitor technology
22 June 2004DCS Workshop 28André Augustinus
Magnets L3 solenoid and dipole
• Responsibility ALICE, TS/LEA and PH/TA3 Control systems by PH/TA3 group
• Similar for solenoid and dipole• PLC based control system, hardwired safety system• Own supervision system, based on PVSS
No control expected from experiment Interaction DCS with MCS hardwired (via DSS) If needed via software via ‘gateway’
• No direct access to PLC’s
22 June 2004DCS Workshop 29André Augustinus
Magnets
PLC
PC
L3 Solenoid
(local) supervisionand operation byMCR (PVSSII)
Dipole
ALICE DCS, global supervision and operation (PVSSII)
DSS
Monitoring (status, alarms, data)
Gateway PC
LAN
Interlock
PH/TA3 ALICE
PLC
22 June 2004DCS Workshop 30André Augustinus
Safety
Has been covered in previous workshops• Level 3 system by TS/MA: CSAM• ‘Secure’ part of DCS: DSS
CSAM information available to DCS via DIP DSS is integral part of DCS A common tool to group safety relevant information
22 June 2004DCS Workshop 31André Augustinus
Summary
Contacts with service groups well established Responsibilities in interface well defined Interface (technical) in most cases being defined
now Need your requirements (gas, cooling)