current status
DESCRIPTION
Current Status. ● Stable system ♦ Intensively used (~1000 emergency dumps since Nov.09) ♦ Get confidence thanks to Operational tests (see next slide) ♦ No false dump. ♦ High availability, except for: ■ VME-bus controller board failures ( same problem with BI crates) - PowerPoint PPT PresentationTRANSCRIPT
Beam Interlock SystemMPP Internal ReviewB. Puccio 17-18th June 2010
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Bruno PUCCIO (TE/MPE) Machine Protection Panel - Internal review - 17-18 th June 2010 2
Current Status● Stable system
♦ Intensively used (~1000 emergency dumps since Nov.09)
♦ Get confidence thanks to Operational tests (see next slide)
♦ No false dump
♦ High availability, except for:
■ VME-bus controller board failures (same problem with BI crates)
BE/CO is aware of this issue. A solution/cure is expected…
■ few failures with redundant PSU installed in CIBU Thanks to redundancy, never lead to a
beam operation disruption.
■ 3 failures with redundant PSU of the VME crateAlways a primary side fault, together with
a permanent short
=> open the circuit breaker.
Unfortunately, only one UPS “reglette” is installed in each BIC’s racks; in other words: our redundancy is useless!
No immediate solution. Waiting for feedback from BE/CO & Elcotron…
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Radiation issues?● Controllers are installed in: CCR, SR3, SR7, UA (23,27,43,47,63,67,83,87), UJ33, TZ76, US15, USC55 and UJ56
♦ UJ56 case: a move to USC55 is already scheduled (shutdown 2012?)
(re-commissioning has to performed)
♦ Other cases: still waiting for R2E inputs (a move to the surface is technically possible; simply a question of
cost..)
● CIBUs are always installed in the User Systems’ racks.
The most critical cases are UJ14, UJ16, RRs,…
♦ If User System equipment is moved, CIBU will be obviously moved.
♦ Irradiation tests performed: the CIBU is most likely less sensitive than the host Equipment.
♦ Thanks to redundancy, SEU will not compromise safety but obviously could provoke a beam dump.
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Operational TestsPre-Operation checks (launched by Beam Sequencer)
configuration verification and integrity check
During Operation (DiaMon application)
fault diagnosis
and
monitoring
Post-Operation checks (included in PM )
response analysis
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In order to avoid blind failure, the User_Permit signal changes must be
regularly checked ð Automated Tests
Automated Test of CIBU connections (1/2)
Connections could be tested from end-to end
recovered “good as new”
But only from the input connectors...
BIS design allows 100% Online test coverage:
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Automated Test of CIBU connections (2/2)
● Already available with only:♦ BLM and BTV systems♦ PIC, WIC and FMCM
● Required for:♦ Collimation (Environmental parameters)♦ Collimation (Motor positions) ♦ Vacuum♦ Experiments (detector parts)♦ Experimental Magnets
…
● FESA property (for VME based system) and PVSS framework (for PLC based system) are both available
MI team is willing to help but it’s up to the User System team to implement
the functionality and write the code.
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Safe Beam Flag and Unmasking....
As an additional safety level,
what about the “removal” of the masks?
YESFALSE
It has been foreseen to force
the Safe Beam Flag to FALSE
before the ramp…
(could be implemented without difficulty)
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● Stable HW system despite few availability issues:
Summary
Not related to BIC boards; under investigation with help of BE/CO.
● Monitoring and Test SW in operation:- Pre-Operational checks recently integrated in LHC Beam Sequencer- Post-Operational checks are included in PM analysis- BIS Java application and Diamon application both give on-line diagnosis- CIBU Automated tests increase the level of confidence:
To be done by the User System teamPartially implemented; need MPP recommendation for (re)activating the “process”
Waiting for a decision...
● Radiation issues? will be only related to machine availability move of BIC in UJ56 already scheduled; for the other locations: we will follow R2E advices
● Masks removed before the ramp?
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Fin
Thank you for your attention
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Spare slides
Spare slides
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Key element of PM analysisThanks to the different gathered History Buffers:- Identification of the beam dump source - Reconstruction to the sequence of events that has led to the beam dump
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CIBU Test Layout
Java Application
FESA interface
User System’s Hardware
CIBU
Beam Interlock Controller
FESA interface
BIS Data Base
LSA Data Base
SET the CIBUTEST property(from User System FESA class)
Force B output Force A output
User_Permit_A input
User_Permit_A output
User_Permit_B output
Read A Read B
JAVA Application
CMW
ADigitalParameter
BDigitalParameter
TestDigitalParameter
ReturnWordStatus
GENERIC SCRIPT
USER_PERMIT_A USER_PERMIT_B Test
Front End (PLC, ...)
CIBU
PVSS
Common interface
User application
(User configuration via a XML file)
PVSS framework (supplied by EN/ICE)
Simplified layout