Difference between revisions of "OWG meeting 31-Jan-2008"
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=Agenda= | =Agenda= | ||
* Review of minutes from [[OWG meeting 14-Dec-2007|14-Dec-2007]] meeting | * Review of minutes from [[OWG meeting 14-Dec-2007|14-Dec-2007]] meeting | ||
| − | * Electronics diagrams - Chris | + | * [[Media:HallD_Online_Electronics_31-JAN-2008.pdf|Electronics diagrams]] - Chris |
* Update on event size study - David for Eugene (who is out of town) | * Update on event size study - David for Eugene (who is out of town) | ||
* Experiment controls (see also [[Experiment Control System Choice]]) - Vardan | * Experiment controls (see also [[Experiment Control System Choice]]) - Vardan | ||
| Line 32: | Line 32: | ||
==Next Meeting== | ==Next Meeting== | ||
| − | 15-Feb-2008 2pm F326 | + | Fri 15-Feb-2008 2pm CC F326 |
==New Action Items from this Meeting== | ==New Action Items from this Meeting== | ||
| − | + | * Use full-scale FDC test as testbed for controls system. | |
==Minutes== | ==Minutes== | ||
| − | Attendees: | + | Attendees: Dave L, Dave A, Dave D, Elke, Vardan, Chris C, Fernando, Elliott. |
| + | |||
| + | |||
| + | '''Chris Cuevas showed the latest electronics diagrams''' | ||
| + | |||
| + | * Chris showed some new drawings, many things moving well along | ||
| + | * Chris showed the latest crate, FADC, and F1TDC counts | ||
| + | * Lots of progress defining newer systems such as TS crate | ||
| + | * ATCA may be an interesting alternative for the global sum crate (more on ATCA at the next meeting...) | ||
| + | * Chris reviewed milestone status | ||
| + | * Four more FADC250's coming, VXS testing continues | ||
| + | * 12-bit is our standard for the FADC250 | ||
| + | * Now have some space in Stan's lab downstairs | ||
| + | * TI design in progress | ||
| + | * New hire starting to work on clock and trigger distribution | ||
| + | * Collecting specs for F1TDC version 2 | ||
| + | * Crate sum design and prototyping going well | ||
| + | * 12-bit FADC requires front-end redesign to use new chip...current one runs too hot | ||
| + | * All drawings will follow Hall D official numbering scheme | ||
| + | * Need network diagrams, location of patch panels, routes, etc. | ||
| + | * More work needed on cable routes, rack layouts, etc. taking maintainability into account | ||
| + | * Three crates per rack seems ok | ||
| + | |||
| + | |||
| + | '''Dave Lawrence reported for Eugene Chudakov on progress in the event size study''' | ||
| + | |||
| + | * Low and high energy photon parts now combined in a single MC generator | ||
| + | * Threshold to about 3 GeV comes from cross section tables, above 3 GeV is Pythia | ||
| + | * MC includes coherent bremstrahlung spectrum | ||
| + | * Still needs realistic trigger algorithm | ||
| + | * Chinese group will arrive end of March and may work on event size study | ||
| + | |||
| + | |||
| + | '''Vardan Gurjyan told us about AFECS, the JLab DAQ group experiment controls framework''' | ||
| + | |||
| + | * AFECS == Agent Framework for Experiment Controls Systems | ||
| + | * Includes finite state machines (FSM's) | ||
| + | * Allows interoperation of hardware and software in a control system | ||
| + | * Allows integration of DAQ, run control, slow controls, etc. | ||
| + | * Talking to a component involves talking to its agent using a uniform API for all agents | ||
| + | * Allows scalability since only the agent needs a driver, and so some bottlenecks can be avoided | ||
| + | * Allows hiearchical design including FSM's at any level | ||
| + | * Supports many protocols (cMsg, CA, OPC, SNMP, etc) | ||
| + | * Written in pure Java | ||
| + | * Web-based monitoring component exists | ||
| + | |||
| + | |||
| + | '''Elliott presented preliminary choices for controls field busses and controller protocols''' | ||
| + | |||
| + | * This is the bottom of a three-layer proposed controls hierarchy | ||
| + | * Goal is to minimize number of field bus types, use Ethernet whenever possible | ||
| + | * Allen-Bradley PLC will be used for solenoid, target, gas systems, experiment cooling systems, perhaps other systems | ||
| + | * Operator gui's will have uniform look-and-feel, so Allen-Bradly HMI (gui builder) will only be used for expert screens | ||
| + | * Elliott proposes extensive use of OPC (world standard for talking to controllers), but also SNMP and others | ||
| + | * Will have CAN-bus and I2C | ||
| + | * See [[Field Bus and Controller Specifications]] for full list of bus/controller choices | ||
| + | |||
| + | |||
| + | '''Elliott proposed Linux-only EPICS for the slow controls layer in the Hall D control system''' | ||
| + | |||
| + | * Elliott attended two ICALEPCS conferences since 2002 and learned about possibilities there | ||
| + | * Viable alternatives are: EPICS, PVSSII, DOOCS/TINE, and Tango | ||
| + | * None appear to be compelling alternatives to EPICS at this time | ||
| + | * Elliott proposed world-standard Linux-only EPICS for the middle control layer | ||
| + | * EPICS seems to be rapidly developing, has embraced Java, and old utilities are being replaced with modern versions | ||
| + | * EPICS community seems strong and growing, and is interested in modernization | ||
| + | * Eclipse-based Control System Studio seems like a good alternative to MEDM, DM, etc, and allows for much improved functionality | ||
| + | * Concerns about whether promising new development will pan out | ||
| + | * See [[Slow Controls Framework Choice]] for more details | ||
Latest revision as of 15:31, 6 February 2008
Contents
Agenda
- Review of minutes from 14-Dec-2007 meeting
- Electronics diagrams - Chris
- Update on event size study - David for Eugene (who is out of town)
- Experiment controls (see also Experiment Control System Choice) - Vardan
- Field Bus and Controller Specifications - Elliott
- Slow Controls Framework Choice - Elliott
- Online Design Goals and Online Major Milestones now include Electronics - Fernando, Elliott
- Online Action Items
Time/Location
Note change from usual date/time:
10am Thurs 31-Jan-2008 CC F326
(Fri 1-Feb-2008 is tracking review all day)
To connect by telephone:
1) dial:
+1-800-377-8846 : US
+1-888-276-7715 : Canada
+1-302-709-8424 : International
2) enter participant code: 39527048# (remember the "#")
Announcements
Next Meeting
Fri 15-Feb-2008 2pm CC F326
New Action Items from this Meeting
- Use full-scale FDC test as testbed for controls system.
Minutes
Attendees: Dave L, Dave A, Dave D, Elke, Vardan, Chris C, Fernando, Elliott.
Chris Cuevas showed the latest electronics diagrams
- Chris showed some new drawings, many things moving well along
- Chris showed the latest crate, FADC, and F1TDC counts
- Lots of progress defining newer systems such as TS crate
- ATCA may be an interesting alternative for the global sum crate (more on ATCA at the next meeting...)
- Chris reviewed milestone status
- Four more FADC250's coming, VXS testing continues
- 12-bit is our standard for the FADC250
- Now have some space in Stan's lab downstairs
- TI design in progress
- New hire starting to work on clock and trigger distribution
- Collecting specs for F1TDC version 2
- Crate sum design and prototyping going well
- 12-bit FADC requires front-end redesign to use new chip...current one runs too hot
- All drawings will follow Hall D official numbering scheme
- Need network diagrams, location of patch panels, routes, etc.
- More work needed on cable routes, rack layouts, etc. taking maintainability into account
- Three crates per rack seems ok
Dave Lawrence reported for Eugene Chudakov on progress in the event size study
- Low and high energy photon parts now combined in a single MC generator
- Threshold to about 3 GeV comes from cross section tables, above 3 GeV is Pythia
- MC includes coherent bremstrahlung spectrum
- Still needs realistic trigger algorithm
- Chinese group will arrive end of March and may work on event size study
Vardan Gurjyan told us about AFECS, the JLab DAQ group experiment controls framework
- AFECS == Agent Framework for Experiment Controls Systems
- Includes finite state machines (FSM's)
- Allows interoperation of hardware and software in a control system
- Allows integration of DAQ, run control, slow controls, etc.
- Talking to a component involves talking to its agent using a uniform API for all agents
- Allows scalability since only the agent needs a driver, and so some bottlenecks can be avoided
- Allows hiearchical design including FSM's at any level
- Supports many protocols (cMsg, CA, OPC, SNMP, etc)
- Written in pure Java
- Web-based monitoring component exists
Elliott presented preliminary choices for controls field busses and controller protocols
- This is the bottom of a three-layer proposed controls hierarchy
- Goal is to minimize number of field bus types, use Ethernet whenever possible
- Allen-Bradley PLC will be used for solenoid, target, gas systems, experiment cooling systems, perhaps other systems
- Operator gui's will have uniform look-and-feel, so Allen-Bradly HMI (gui builder) will only be used for expert screens
- Elliott proposes extensive use of OPC (world standard for talking to controllers), but also SNMP and others
- Will have CAN-bus and I2C
- See Field Bus and Controller Specifications for full list of bus/controller choices
Elliott proposed Linux-only EPICS for the slow controls layer in the Hall D control system
- Elliott attended two ICALEPCS conferences since 2002 and learned about possibilities there
- Viable alternatives are: EPICS, PVSSII, DOOCS/TINE, and Tango
- None appear to be compelling alternatives to EPICS at this time
- Elliott proposed world-standard Linux-only EPICS for the middle control layer
- EPICS seems to be rapidly developing, has embraced Java, and old utilities are being replaced with modern versions
- EPICS community seems strong and growing, and is interested in modernization
- Eclipse-based Control System Studio seems like a good alternative to MEDM, DM, etc, and allows for much improved functionality
- Concerns about whether promising new development will pan out
- See Slow Controls Framework Choice for more details
